Drag Racing 1/4 Mile times 0-60 Dyno Fast Cars Muscle Cars

4g63 Balance Shaft Elimination - bearing modification

This is the first part of a two part series about balance shaft elimination on 4g series engines. This video details the bearings, the other video will cover the front case modifications. I've already got a low-def video of the front case mods, and I plan to re-shoot that one in HD when I'm in the assembly phase. It's linked in the video. The balance shafts are designed to cancel out harmonic vibrations caused by combustion and the spinning rotating assembly. They may offer a greater degree of comfort to the driver and passengers, but with that comfort comes a price. Often, when a 4g63 timing belt gives up, it's because the balance shaft belt breaks or comes loose and takes the timing belt out with it. When that happens, it can total your pistons, valves, damage the crankshaft, wrist pins, timing belt tensioner and crank angle sensor. Basically, it can total your motor. The balance shafts also have a combined weigh over 10 lbs and both are driven off the timing belt making them additional and heavy rotating mass. If you've got a lightweight flywheel but still have balance shafts, you have your priorities mixed up. So here's what you do with the bearings. It's easy. You can do this at home. You CAN do it with the motor in the car, BUT DON'T. You must enjoy punishment to do this like that. The end result will slightly increase your oil pressure, but usually not enough to cause concern unless you have a full-circumference bearing turbo, ball bearing turbo--with your oil feed coming off the oil filter housing. The head feed would be better in that case because it's regulated at 15 PSI.


 


More Videos...


CRANKWALKED? 7-bolt teardown 1080HD
Now this is a story all about how My bearings got flipped-turned upside down And I'd like to take a minute just sit right there And tell you how I used to mix and burn my gas and my air. In RVA suburbs born and raised On the dragstrip is where I spent most of my days Chillin out, maxin, relaxing all cool, 'n all shooting some BS outside with my tools When a couple of guys who were up to no good Started running races in my neighborhood I heard one little knock and my rods got scared And said "You put it in the garage until you figure out where..." I Begged and pleaded that it not be that way, But it didn't want to start and run another day. I kissed it goodbye, because the motor punched its ticket I got out my camera, said "I might as well kick it." Crankwalk yo this is bad Drinking metal shavings from an oil pan. Is this what the rumor of crankwalk is like? Hmm this won't be alright But wait I heard knocking, grinding and all that Is this the type of failure that should happen to this cool cat? I don't think so, I'll see when I get there I hope they're prepared for this video I share. Well I pulled all the bolts and when I came out There were chunks in my fluids in the pan and they drained out I aint all depressed cause I seen this before. I got my books and my wrench and we'll do it once more. I sprang into action like lightning disassembled I whistled while I worked and my hands never trembled If anything you could say that this bling is rare, and when I saw what broke I stained my underwear. I turned off the air compressor 'bout 7 or 8 And I yelled to crankcase "Yo holmes, smell ya later" I looked at my internals they were finally there To sit on my workbench and stink up the air. Audio track by RojoDelChocolate. Here's the 48,000 mile-old 7-bolt I blew up summer 2011 after over 150 drag passes, a half dozen Dyno sessions, 4 transmissions, 3 clutches and 10 years of hard all-weather use.





Cylinder Head 204 - Porting & Polishing
This is a first-generation 1992 1.6L Hyundai Elantra small-combustion-chamber head. Thats what it is. It's a J1 Elantra cylinder head. Good luck finding another one like it. (read more)... In Cylinder Head 106 I talked about the mainstream porting theories as they are discussed. We looked at a cylinder head that I have thousands of dollars of professional work performed on, and a bone-stock second-generation head that I didn't port. In this video I just might do something you haven't seen done before. For some, that may be uncomfortable. The port and polish job I perform here is what I think will work best for my current build. This is not an extreme killer port job. What will be different here is where port textures are concerned, I will be following the advice of a reputable source that will remain un-named. You're free to port yours differently than I do in this video, and I give you that out, around the 20 minute marker. The Hyundai is far from being an ultimate-performance build. It's a $400 box of scraps with nothing but time invested. It's perfect for this video. My finished product WILL be an improvement over what I had. I don't yet have access to a flow bench. I still have an achievement to un-lock. As far as you should be concerned with the techniques I employ... without flow numbers there is no evidence of what this will do, but we will gather lots of info from dynp sessions and drag strip time slips. If I could test it on a flow bench, I would. There are MANY, and when I say many, I mean thousands of flame war mongering pirates floating around on rough seas with a hair trigger cannon finger itching to fire if you port a head any differently than what the herd mentality says to do while porting a cylinder head. I cover the herd mentality because it has merit. It's been tested. Tried and true. But I don't follow it to the letter of the law. I'm definitely not here to de-bunk it. I would port a cylinder head differently for each build based on how that engine was used. There's an extremely valid reason why relating to air speed. It's not the texture of a port that maximizes the effect of fuel atomization, but the velocity of the air running through an x or y sized valve. The driving factor in this is the piston speed. I'm not going to give you the technical information, but will refer you to information about the Lovell factor. There's a better description of this in the links below, and even a calculator to help you find your engine's sweet spot. Why the Lovell factor is important: https://www.highpowermedia.com/blog/3346/the-effect-of-valve-size Lovell gas factor calculator: http://www.rbracing-rsr.com/lovellgascalc.html Only people who have flow testing equipment know for sure what really works and have the capability to produce a perfectly-matched port job for the ultimate performance build. Those guys know the definition of ultimate, and THEY are floating below the water Aegis-class submarines ready to blow your comment up if you don't know what you're talking about. They don't care if you're an armchair mechanic or a herd of pirates. I will say, they're zoomed in pretty close on me right now, and I'm expecting to take a few hits. My work will be tested based on Dyno and drag strip performance, and the results will be posted here. Fortunately, those kinds of videos are a WHOLE LOT EASIER TO MAKE!!!





7-Bolt Shortblock Failure - Full Diagnosis
If you are your own mechanic, there is no more important character trait worthy of development than the ability to own your mistakes. That's where the line is drawn between good mechanics and bad mechanics. It's not the failures but how they deal with them that measures their ability. In short, it's not easy to admit you did something wrong or were negligent. But if you don't own it and talk about it, it doesn't get fixed, and nothing positive can come from it. It was my quest to overcome my clutch issue that lead to the creation of a video. That video is the textbook perfect guide for how to correctly install a DSM transmission. https://www.youtube.com/watch?v=6bE_9sWtnSY&list=PL4B97C16D423317DD Crankwalk as described is caused by a casting defect. This was not a defect. This was preventable. A lot of people would find something like this and not tell anyone out of embarrassment. I'm not ashamed. It's my fault. I got good use out of this engine and it was tough enough to make it 48K miles since the last rebuild despite my abuse. I'm here to tell you if you bought a used car that's had its clutch replaced, or if you ever pay someone else to do it... make sure it has this bolt. It's stashed away between the starter and the transfer case, so it's hard to see. Make sure all of your bell housing bolts are torqued properly because fastener problems can destroy your shortblock, clutch and transmission. If your car fails because of a mis-aligned transmission, you have no reason to blame crankwalk. It wasn't until I bought my next AWD car that I discovered there was a smaller bolt on the other side of the block. I destroyed 3 transmissions in the GSX first. With the damage already done to my crankshaft, I then lost a shortblock. It's an ounce of prevention that's worth metric tons on your bank account. Grade 10 M8x60 bell housing bolt = MD706012. It gets 22-25'lbs of torque. Owning my mistake permits me to learn from it through con$equence$, and never repeat it. What good would it have done anyone else for me to learn this lesson and not share it? That's why I'm providing this video to all of you. Sharing it can perhaps help someone else avoid this costly mistake. This is the final chapter for my 7-bolt, and this book is going back on the shelf. Here are some valuable resources if you're trying to read bearing damage: http://www.enginebuildermag.com/Article/5150/csi_engine_bearings_when_good_ bearings_go_bad.aspx http://catalog.mahleclevite.com/bearing/ http://www.studebaker-info.org/tech/Bearings/CL77-3-402.pdf And of course, now that I've covered the complete oil system, transmission and driveshaft series of videos, you now have all the tools necessary to ensure your 4g63 lasts a very long time. Whether the casting defect exists?... or it's all caused by a bolt, or the harmonics, or whatever... Sure, crankwalk exists and it's horrible. But with the small amount of movement required for your crankshaft before it contacts the block isn't far enough to make your clutch drop to the floor when you turn. You'd be hearing woodpeckers and jackhammers on the crank long before that clutch pedal would fall to the floor. Some people are going to hate on me for saying that. That's fine. I believe all of the people who experienced the clutch pedal issues had fastener problems on their bell housing. DSMs get a bad reputation for this but we can change that. Crankwalk is never the cause of your engine failure. Crankwalk is always a symptom of the real problem. It's your disease that makes you deny it's your fault. You've got the 'itis. DSM-itis. Whenever you dig deeper, you'll discover what applied all of those thrust loads to your crankshaft to begin with, and it's not going to be a casting defect that moves your crank .101". Mine only went .014", but all of the same parts failed. PLEASE tell me in the comments if you find this bolt is missing from your car.





Cylinder Head Re-Polish
UPDATE: INgrooves and Believe Digital have filed fraudulent strikes against my YouTube Channel for this video. They do not respond to disputes. If my disputes expire without first being dismissed by these labels, I will never remove this text because others deserve to know about the copyright abuse of the recording industry. Record labels file claims on YouTube to content they don't own because they want to steal other people's creative property, install their own advertising, and profit from works they had nothing to do with creating whatsoever. It's their new business model. They are doing to the public what they've been accusing the public of for decades. They and the artists they represent can not legally stake any claim against my audio content as it was created 100% with loops owned and provided ROYALTY-FREE by Apple Computer, Inc. These USAGE RIGHTS come with the PURCHASE of Logic Pro Studio. APPLE INC. RESERVES OWNERSHIP RIGHTS of this royalty-free content used to produce my audio track, not the artists that these entities have fraudulently submitted for waveform scanning to the Content ID system. The license agreement can be found here: http://www.apple.com/legal/sla/docs/logicstudio8.pdf Anyone claiming ownership of any part of this video other than Apple, Inc. is committing fraud. Blocking my monetization is harassment. A DMCA violation would be extortion. I composed and recorded this song. It's my original composition. I own ALL THE RIGHTS to the content in this video, the equipment used to produce it, and possess the receipt, packaging and printed license agreement included with all of the products used in this video's creation. 4 other un-named labels have also filed claims on this one video. 2 were dismissed within hours of submitting the dispute, 2 required more than 2 weeks of digging through public web forums until someone provided me their private email addresses and it still required several emails. The two remaining have completely ignored their responsibility to respond to the dispute process, which takes 30 days to expire. One of them will be immortalized here permanently as of October 10th, 2013. YouTube is not taking adequate measures to ensure the record labels own the materials they submit for waveform scanning. YouTube does not provide contact information to YouTube partners for any of these entities who file fraudulent content ID claims and then ignore disputes. YouTube does not remove the works submitted by record labels that include public domain, royalty free, fair use or licensed samples. It appears they don't do any screening of the works submitted by the labels. YouTube needs to fix these issues for the sake of your quality entertainment because uploaders are suffering from the lack of these features, and this kind of e-bullying will stop channels from producing and uploading quality original content for you to watch. Time I spend disputing claims and ownership rights is time I'm not wrenching, filming and editing. The recording industry has devolved into a waste of everyone's time. Their usefulness in modern media distribution has driven them to these desperate measures to remain relevant and profitable. Now they just resort to harassing other self-made artists that they don't represent over content they don't own. --------------------------------------------------------------------------- -------- Hey, you know this is just one of those extraneous things I have to do that takes time. This car won trophies for this, and it has a reputation to maintain. When we're putting this thing back together, there's a certain order I have to do things in. Polishing comes before the final cleaning and parts installation. After that, it never ends. This is purely cosmetic. I created the soundtrack using Logic Pro. Because I can. It's mine.





Crankshaft Refurbishing
Many of you have seen this one before. I apologize if bringing it back offends anyone. Domestickilla gave me a crankshaft, and it's a nice one that I want to clean up and use again. You'll be seeing a lot of it and because of this, this video deserves to be here. I fixed what I broke, and this was my experience. In this video Ballos Precision Machine demonstrates magnetic dye penetrant testing, crankshaft polishing and inspecting the balance of a "butchered" 4g63 6-bolt crankshaft.





Calculate Your Compression Ratio
This is everything you need to do to calculate your compression ratio. No foolin'. Every equation and process demonstrated. Find all your variables. Know your exact compression ratio in every cylinder. This is how you do it. Just because your service manual says your car is 7.8:1 or 8.5:1 compression doesn't mean that it is. Whenever there are casting irregularities, variations in piston height, parts that have been machined, non-OE parts, or changes to your head gasket selection, your compression ratio WILL change. It's highly probable that you're only CLOSE to spec if you've never touched your engine at all since it was "born", and that it doesn't MATCH spec. Even if it did, how would you know? This. 5 variables. V1 Swept Volume V2 Deck Volume V3 Piston-to-deck clearance V4 Piston dish cc's V5 Head combustion chamber cc's The ratio math: V1+V2+V3+V4+V5 = volume of combustion chamber at BDC V2+V3+V4+V5 = volume of combustion chamber at TDC The ratio is... (V1+V2+V3+V4+V5) ÷ (V2+V3+V4+V5) : (V2+V3+V4+V5) ÷ (V2+V3+V4+V5) or BDC ÷ TDC : TDC ÷ TDC First you fill in the variables, then you calculate volumes, then you add the volumes, then you reduce the ratio (fraction). It's that easy. Here are your magic numbers: 0.7854 = Pi quartered to the ten thousandth 16.387 = number of cc's in a cubic inch. If you divide any number in cc's by 16.387 it gives you inches. If you multiply any number in cubic inches by 16.387 it gives you cc's. Quartering pi lets you use the calculation: BORE x BORE x STROKE x .7854 = volume of a cylinder instead of... π x (BORE ÷ 2) x (BORE ÷ 2) x STROKE = volume of a cylinder Either way is right. You get the same result if you calculate pi to the ten thousandth. While I apologize for all the math, no I don't. I'm really not sorry. You actually clicked here for it whether you realize it or not. This is ALL the math, the tests, and the whole process to calculate your cylinder volumes and compression individually even if you don't know any of your variables yet. All of my numbers are present for those who want to calculate out the last 3 cylinders out of curiosity just to see how it affects cylinder volumes and compression ratios from one cylinder to the next. Why would I do that for you? Why would I deprive you of that practice? Just assume that all 4 of my combustion chambers are 41.75 ml if you do this. Clicking like share and subscribe helps a channel grow. It also motivates me. Don't sweat the camera. It's enough to know that so many of you care about what I'm doing here. From the bottom of my atmospheric dump, I thank you all! This gift horse's teeth are all over the place, but he sometimes poops gold nuggets. PS: Use ATF for your piston dish volume tests, not alcohol. Of course it's better just to use the spec sheet included with your pistons... but not everyone gets that luxury. Water is just fine for head combustion chamber tests. Dry and re-oil all parts that water touches.





4g63 Block Oil Gallery Mod
This modification is intended to improve your 4g series engine's oil delivery. People frequently discover large chunks of flash in their engine's main oil gallery. It's because the galleries are part of the cast, they're not machined into the block. There is also a very rough sharp edge where the main oil gallery is bored into the block, and oil must make a slightly greater-than 90° turn in order to begin its course to the parts it lubricates. Both of these conditions cause turbulence in the oil flow. My goal in this video is to eliminate as much of that as I can. This is a cheap and easy modification if you have the tools, and the patience. Any engine with cast-in oil galleries could probably benefit from this. Be careful not to cut into the high pressure oil gallery or else you will circulate un-filtered oil to the #1 main, oil pump, and rear balance shaft. You will also deprive the rest of the engine the oil pressure it needs to operate. So in short, punch a hole in that and it's trash. I did this my way, everyone may choose to do this a different way. I just wanted to make this video to raise awareness. Also, there's a great thread on DSMtuners about this. Pictures and everything. Written by a machinist and friend of the DSM community. Go give him some reps because he's posted a lot of great info about the DSM oil system over the years. http://www.dsmtuners.com/forums/articles-engine-fuel/452546-4g63-block-oili ng-mod.html





6&7-Bolt 4g63 Front Case & Oil Pump Rebuild
Here we disassemble, clean, inspect and rebuild both popular 4g63 front cases. This is not difficult, you just need to know what to look for. Something else that happens in this video is the analysis of one of the factors that caused my 7-bolt engine to fail. It wasn't the only cause, and we'll talk about that later, but left to its own devices and without the other contributing factors, it would have been the only cause.





Hyundai Elantra 4g63 Shortblock Assembly
HOLD ON TIGHT! HERE WE GO! We begin the blueprint and assembly on my 1992 Hyundai Elantra's bastardized 4g63. The parts used in this are from a mash of different brands and models outside of the typical 2.0L 4g63, but the specs and standards I am following for its assembly are for the 2.0L DOHC. If you want to follow along in your service manual to verify what I've done here in this video, the processes we cover here detail pages 11C-95 through 11C-105 of the 1g Overhaul manual. I would prefer you not rip them from the binding and throw them away, relying only on this video for instruction... but rather use this video as a motivational guide, and as a demonstration of the techniques involved in those sections. You gotta do the cooking by the book. I never had any intention of making instructional videos on this particular car, but after it blew up I slowly realized it's actually a better case study for how a 4g63 ticks than anything else in my driveway. There are several reasons for this. One being that it's a mix of parts that shouldn't be bolted together, and the other is that many of you watching my videos aren't trying to build a 600hp engine out of aftermarket parts. You're trying to put back together what used to be your daily driver. This car covers those bases. Don't think for a second I won't go through this same trouble and level of detail for the GSX. I will. When I do, having this information in this video will give you a better understanding on how and why I do things the way I do when I get there. This was the shortest I could condense this video. I've never uploaded a video this long, and I hope I never have to do it again. It took a month to create on cutting-edge equipment, 16 hours to export, and 9 hours for YouTube to process. My script for the voiceover is 6 times longer than the whole script for the movie Pootie Tang. 6 times. Longer. Than a Hollywood movie.





Block Preparation Part 1
Preparation for powder coating and Glyptal application. Audio track is an original performance by Rojo Del Chocolate. My block is being powder coated rather than painted. It's just something I do. The GSX had it on the last block so it's getting it again. Since the tools are so similar and the mess is the same, I'm going ahead and preparing it for the Glyptal application as well. These 2 coatings will require being baked separately. The powder coating is baked on at a hotter temperature than the Glyptal, so it's going first. The surface preparation instructions for Glyptal is as follows: Surface to be painted should be dry and free from dirt, wax, grease, rust and oil. Remove all grease and oil by washing surface with mineral spirits. Wipe or scrape off all loose dirt, rust or scale. The last sentence is what's covered in this video. The 2nd sentence happens next (although it's already degreased), and I'll get it back from powder coat with it in the state described in sentence #1 completed. If following these instructions to the letter of the law. Second and third opinions in... the main journal is fine. You'll notice that I didn't coat the main caps, or "suitcase handles". I'm not going to. You bang around on these installing and removing them, and I don't want to risk chipping them once they're coated. They're below the windage area, and there will also be an un-coated main bearing girdle down there. This video covered 25 hours of actual work. Yes, I kept changing into the same filthy clothes every shoot because I wanted it to look consistent. You have to take your time doing this kind of work, and be VERY VERY CAREFUL! If for some reason you're crazy enough to attempt what I do in this video, you do so at your own risk. This is an elective treatment that I've never done, but I am by no means the first person to do it. I'm learning about it just like the rest of you.





Turbo Elantra Bearing Failure Diagnosis
I had time to look at this thing up close. Go through the oil system, and check out all the bearings. Looks like another good study for my oil system series because it's the opposite problem that my GSX experienced. High oil pressure can be remedied a number of ways, but left unchecked can actually take a toll on your bearings. The way your engine bearings work, the parts they suspend are supported only by an oil film layer, and flow needs to be right in order for it to work as an actual bearing. If the oil supply is insufficient, then it loses the ability to suspend the part causing it to crash into the bearing surface. If oil flow is too great, friction is increased, the flow becomes turbulent, and the oil film doesn't form properly. High oil pressure can float and spin rod bearings, and that's worst-case scenario. I had several un-favorable conditions going on inside this engine and that makes it a little bit difficult to link what my engine experienced to any one singular thing. I think it's easier to look at it like some sort of perfect storm. From sub-standard parts for how the engine components would be used, to oil pressure, to part fatigue, to part history to abuse... this thing's got a little bit of everything working against it and that's why it's such a hilarious car. It was given to me with one condition. "See what this thing will do, and see how long it goes before it breaks." My take on it is, the parts are still less than ideal, and they've still got life left in them. It's worth fixing. These parts are worthless as a race motor, and normally I'd have junked 'em, but it's the Hyundai.





Blueprint 108 - inspect the deck
There's a reason why there are no subtitled specifications in this video for the block. It's because they don't exist in either service manual, 1g or 2g. You're not supposed to remove material from a block on the deck surface because it has ill effects on parts of the combustion chamber geometry, and alters your compression ratio. It can be done intentionally in some cases for a desired side-affect, but if you have to deck a 4g63 head, it would be advised to use a thicker head gasket. The Mitsubishi Multi-Layered-Steel or MLS gasket is slightly thicker than the OEM composite gasket. Also, HKS, Power Enterprise, Cometic, and other performance brands all make MLS gaskets that are .065 and thicker. THERE IS ONE ERROR IN THE VIDEO. I said a block with .002" warpage is junk. I was completely and totally wrong. While I don't wish to spread misinformation, I don't think it's a big enough error to warrant re-editing this video. I just wasn't paying attention. .002" warpage on a cylinder head is the service limit before it needs machining. I meant to say .02"... or two HUNDREDTHS (not thousandths) of an inch. ...and here's my justification... A warped block to me is junk either way even if its minimal because your MLS gasket will never seal unless both the head and the block are perfectly flat. Trust your machine shop to get the values for how much is taken off, and buy the correct thickness gasket for your machine work. A factory head gasket (composite) is .051" The MLS Mitsubishi gasket is available in the stock .051 and a .062" Cometic makes gaskets up to .072" There are some brands that go as high as .127", but I'd have thrown both the block and head away long before then.





New Year's Eve Hyundai Teardown
It goes like this. One of the best friends I've ever had built this car from junk parts. He said it best, "it was built from literally a box of scraps". It ran an 13.2 in the quarter mile using no aftermarket performance parts of any kind. That quarter mile time was limited by traction. I know this car had more in it, but I never managed to get it to stick before encountering this. More on this build... The proper bolts were not always available, but the builder knows isht from Shinola. Even though this engine defies all engineering logic from Mitsubishi, the builder knew what would work and what would not. Budget was of the most primary of his concerns, and it shows at every turn, and it's what brought us to the kind of failure we find in this video. I asked him what bearings he used. He said, "...the least expensive ones I could find. Picture Aluglides. Now picture generic Aluglides. I paid half-as-much for those bearings as I would for generic Aluglides. Bolt too long? Put a nut on it and shorten it. Oil pan too close to the pickup? Hammer a big dent in it to make clearance for it. Wrong water pipe? Put a brass hardware store tee in the line to tap a turbo coolant feed. Forget buying ARP's, this is an all-standard re-used factory fastenere'd no-oil-squirter .030"-overbore 6-bolt with the cut-off balance shaft mod. It's using a small combustion chamber head off of a 1.6L Mirage with a 2.0L non-turbo block. The plug wires are used. The radiator hoses were used. Everything but the head gasket came from a junk car. The FWD turbo gearbox is from my 150,000 mile old Plymouth Laser that donated the block to the Colt. This is one of the most amusing cars I've ever wrapped my fingers around because of these kinds of character-building attributes. Nevermind that the chassis has less than 70,000 miles on it (not bad for a '92), it's just that it's built without using any new parts. Parts were substituted when they were not available, and it's ridiculously powerful. Thank you Jamie. You discovered your answer. I'm happy to help. I'll be changing some things like the oil pan bolts, bearing quality, some of the plumbing and fixing a few wiring harness problems, but I'm not changing anything else if I can avoid it. This car was never intended to have anything upgraded to deliver raw power, and I'll do my best to keep it that way, replacing and restoring what failed so that we can keep pushing these generic non-turbo .030" over pistons to the limit. Apparently, 24 PSI from a 14b is not enough. In the meantime, my diagnosis is that excessive oil pressure lead to the breakdown of the #1 bearing. After all, it's the 1st bearing in-line in the oil system on the main gallery. It's the most isolated from clutch harmonics, yet it was the one that spun. The #1 bearing supplies the oil pump. The teardrop on the head is nearly gone from head resurfacing, and this is a no-balance-shaft no-oil-squirter block. I think high oil pressure is why it falls on its face above 6000 rpms. There's a restriction upstream from the lifters and they deflate at high RPMs, losing lift. I'll fix it. I've got the parts.





Cylinder Head 201 - Radius Cut Valve Job
This video covers the complete valve job process that your machinist might perform. If the 100 series videos didn't help you identify and correct a problem with your cylinder head, then this is the next step. This video is brought to you with permission from my machinist in full 1080HD, and covers cleaning up the head inside and out, preparation and setting up a radius cutter, cutting all 16 valve seats, valve grinding, and spans 3.5 hours of actual work in under 30 minutes. There's nothing like this anywhere else on YouTube. THANK YOU BALLOS PRECISION MACHINE. Thank you for the professional explanation and execution of a job excellently-done, and un-precedented access to your facilities. A valve job is done by re-grinding or replacing valves, and then having new seats cut to match the faces of the valves you're using. There are several different machines that might be utilized to achieve this result, but the process is the same no matter how it's done. There are seat cutters that utilize cutting stones. There are valve seat cutters with 3 separate angles installed 120° out-of-phase, and there are single cutters with all 3 angles (radius cutter) that cut with one blade in one pass. The machine demonstrated here is a Sunnen VGS-20 Radius Cutter. This machine (now out of production) produces a gradual curved seat that's superior to the shape of a traditional 3-angle seat. While a radius cutter does contain the 30, 45 and 60 degree angles, it does so without leaving any sharp edges between their faces. My valve selection includes Supertech 1mm oversized nitride-coated stainless steel undercut and back-cut intake valves, and 1mm oversized Inconel back-cut Exhaust valves. Inconel is a high-temperature alloy utilized in marine and forced-induction performance engines that can handle more abuse than steel can without melting. The other characteristics of the valves which are discussed typically yield bigger gains in airflow than simply using a bigger hole and a bigger valve. Why I did this to a perfectly-good cylinder head: I changed cams. Because the valves were previously recessed during another valve job 9 years ago, my valve installed height was increased and this raised the operating positions of my rocker arms. My new camshaft selection dictates using the stock valve install height. The only solutions to this valve install height problem are to either replace the valve seats, or install oversized valves. I opted for the latter.





Cylinder Head 105 - Valve Job Basics
Valves not sealing? Valves not bent? This is how you fix that problem. In this video I outline the basic valve job procedure. Cleaning the valves, cleaning the seats, cleaning the combustion chamber and lapping the valves in to make a better seal. Here I cover the process start-to-finish. It's the same exact process for pretty much all non-rotary combustion engines. It takes patience and perseverance to do this job, but anyone can do it. Reference your service manual for measurements and service limits. Everything else that's not in your service manual is in this video. I apologize for not having broken busted crap to work with in this video. It's more beneficial to all of you when bad fortune falls on me because it gets well documented, and many people watching these videos are looking for answers. If you have bent valves, you will discover it quickly once you chuck one up in the drill. You'll see the face of the valve wobble around while it spins. You'll see evidence of this damage on the valve seat. If it's bad, you may see damage on the valve guides in the form of cracks or missing pieces where the valve guides protrude through the head ports. Give all that stuff a good visual inspection. ...and if you doubt yourself, never hesitate to get a second opinion or consult a machine shop. They will have access to expensive tools that you wont find in your average gearhead's garage.





Which car is faster? Which Car is Faster?




Similar 1/4 mile timeslips to browse:

2006 Yamaha YZ 250 2 stroke: 12.940 @ 97.550
Daniel Eising, Engine: 249cc, Supercharger: - Turbos: - Tires: knobbies


1993 Volvo 940 : 13.065 @ 104.150
Derrick Wooten, Engine: 2.3 turbo, Turbos: 15g


1992 Volvo 940 Turbo: 13.200 @ 101.980
John Nobinger, Engine: 2.3L 4 cylinder, Supercharger: None Turbos: Mitsubishi 15g Tires: 225/50/R16 Hankook


1995 Volvo 940 Turbo: 14.008 @ 100.300
Eric Simpson, Engine: 2.3L 8V, Turbos: Single TD04H:-15G upgrade Tires: 205/55-16


1995 Volvo 940 Turbo: 14.120 @ 98.730
Sean Williams, Engine: Volvo Redblock (2.3L SOHC 8V L4), 200k miles, Turbos: TD04HL-15G Tires: 205/55/15 Warrior El Cheapos


1937 StreetRod Morris 8: 14.418 @ 99.020
phil gilbert, Engine: sbc crate engine, Supercharger: no Turbos: no


1992 Volvo 940 Turbo: 15.600 @ 88.730
Matt Lipa, Engine: Stock 2.3L I-4, Turbos: Stock Mitsubishi 15-g


 


©2014 DragTimes - Disclaimer - Contact Us