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.
How to polish a crank ( crankshaft )
Engine-Guru.com Presents a video on how to polish your crank shaft. Any questions call 616-430-3114 ask for KYLE. We are located out of Grand Rapids ,Michigan.
Mitsubishi 4G63 Honing with Torque Plate
See what a difference a torque plate makes on a Mitsubishi 4G63 block out of an Evo IX makes as John Edwards @ Costa Mesa R&D Automotiove Machine walks you through the steps. (949) 631-6376 Don't forget to 'Click' and SUBSCRIBE.
Cylinder Head 103 - Deck Tech
How to clean, inspect, and determine what you can do with your cylinder head. Also how WHAT you do affects your oil system. There are many variables at play when you make changes to your cylinder head deck from your oil system, compression ratio, your valve timing and potentially even disaster. 'best not to go that far with it. Watch this video and avoid it if you're building your own 4g63 head.
The differences between this head and a 1g head are mostly related to port sizes on the intake and Exhaust, and different sized head bolt holes. The 7-bolt uses an 11mm bolt, and a 6-bolt uses 12mm. 1g heads have gigantic intake ports, but aside from that, valve geometry, oil system functionality and the service limits are all the same.
Also, click these links for in-depth discussions about oil port modifications for all generations of Mitsubishis, and specifically for 2g head installations on a 1g block.
4g63 Oil Port Modification:
2nd gen head on a 6-bolt block:
Possibly 2 of the best threads on 'Tuners for anyone considering a 1g-in-a-2g or for anyone that wants to know everything about a DSM oil system.
4G63 Datsun 1200 - Jett Racing
Mitsubishi 4G63 turbo powered Datsun 1200 Ute by Jett Racing. Racing in the Pro Compact class at the 2012 Sport Compact Brisbane Jamboree.
CRANKWALKED? 7-bolt teardown 1080HD
One for the weekend warriors... Audio track by RojoDelChocolate. And that really is Mr. Chocolate himself playing some jungle-action on his drum kit to a bunch of garage band loops. Give the man some props!
Here's the 48,000 mile-old 7-bolt I blew up this summer after over 150 drag passes, a half dozen Dyno sessions, 4 transmissions, 3 clutches and 10 years of hard all-weather use. The cleanliness of the crankcase and overall lack of carbon buildup is a testament to the quality of Mobil1 Synthetic oil.
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,
And 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 trying to get depressed cause I got all my spares out.
I sprang into action like lightning disassembled
I whistled while I worked and my hands never trembled
The 7-bolt was FRESH with the shine like a mirror
If anything I can say this bling was rare
What I saw inside the engine 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.
Blueprint 104 - The Crankshaft
It's important to know what you've got even before dealing with the machinist. If you want to inspect a crankshaft, this is how you do it. I detail the process of removing the crank and what to measure. All specifications in this video are illustrated with a 6-bolt 4g63 turbo block, but are all actually the same for 7-bolt engines with the exception of the rod widths.
Cylinder Head 101 - Remove Cams Rockers & Lifters
Going through a 4g63 Cylinder Head? You're on the right channel. I don't know how many parts there will be to this series, I suppose it could go on forever... We all have different ways of doing it, and I'm going to show you mine.
This video won't put a dent in most people's grey matter outside of entertainment value... but I tried to keep it fun. I'd like to leave at least a small dent. But no music in these because they're going to cover a lot of ground and fast. I'm not doing anything difficult. This part of this job really isn't. Most everybody pays someone else to do the complicated stuff for them, and those people do it every day so it's still easy unless you earn your money to pay for it from difficult and degrading means.
But this video's about getting started. There's some safety and organization tips to be aware of before diving in. Stuff that could help people whether or not they even own a Mitsubishi. Everything else is in the videos!
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.
Mitsubishi Galant Stroker Motor
This is a Mitsubishi, 4G63, Galant engine that we put a late-model 2,4 stroker crankshaft into. See some of the mods that you need to do to do this inexpensive stroker conversion. Costa Mesa R&D Automotive Machine (949) 631-6376 Don't forget to "Click" and SUBSCRIBE.
4g63 Turbo Manifold Swap #1
This is one of the problems I found after the Thursday night test & tune. Over the next 2 days, I kept watching my airflow counts dropping gradually in my logs and knew what was going down. Then I decided to drive it to work and it sounded like somebody was running next to me with a lawnmower... further confirming that I knew what was going on. Yep. Pre-turboExhaust leak. It still had balls when I mashed the gas, but I could tell it wasn't right. I was surprised because when I found the crack, I realized I shouldn't have even been able to spool the turbo. This manifold flows better than the stock piece, sure... but unless you get one made of inconel, it's a raging pile of crap. Get rid of it. 304 stainless doesn't cut it. I even had the lower turbo/Exhaust brace in place, so it wasn't getting wrenched on accelerating and decelerating. This thing just wore out & broke off from heat and pressure, and it did it in less than 2000 miles. Yes, it's the one in the polishing video.
Other things that are a good idea to do...
1) always use factory turbo bolts and washers. You're supposed to replace them with NEW bolts and washers. Use FACTORY TORQUE SPECS! 21-23lbs + 60-70°
2) Stainless Steel 3mm turbo gaskets are re-usable. Worth the investment.
3) Use Stainless Steel ARP head studs. They don't break off like OEM ones do. This job sucks when you snap off factory studs. Use FACTORY TORQUE SPECS! 19-21 lbs (even on ARP hardware) for the M8 nuts. 21-23 lbs on the outer two M10 nuts if you have a 2g.
4) if you have to replace one, just get the EVO manifold. It dwarfs both the 1g and 2g. The turbo flange is bigger, so put my turbo port & polish video to use. It doesn't need to be ported like the 2g part does, and it's a thicker cast making it last much longer. If you have the cash, go ahead and buy the Forced Performance cast manifold. You won't regret it.
5) The only people that will know why this video is called Manifold Swap #1 are the people who read the info. I have a brand new FP manifold that's being ceramic coated, and I had bought it prior to this failure, not anticipating that it would happen. Lucky me. I hated where the tubular bits ended up in my engine bay, and they're preventing me from re-installing my polished valve cover. The only reason I put that thing on my car was because the 2g stock manifold was ugly. Ugly, sure... but it works just as good and more reliably than these tubular things. If you buy a manifold, buy a CAST manifold.
WORLDS FASTEST AWD / 4G63 DATSUN / 20B RX7 IN TESTING
Willowbank Raceway held the 1st of the 2012 Top Sportman Series on the weekend. Reece McGregor and the Heat Treatments Skyline thought it would be a good chance to have some test runs in their worlds fastest RB26 powered 4wd skyline. The team worked hard all day and were rewarded with a final pass or 7.64, not far off their 7.56 record, although something tells me theres plenty more to come from this car again.
Another car using the test lane was Rob Novak in his Jett Racing 4G63 powered Datsun 1200. The team made adjustments through the day and saw a PB 7.35 @ 187mph on the second last pass of the night, the final wild pass on video then saw a transmission failure but a happy team none the less.
Final team testing was the Direct Clutch/Promodz Rx7, the car is 3/4 chassis and a running 3rotor 20BT tweaked by Mazfix. The team recently made adjustments in the rear and also in transmission and are starting to see results, it ran a 7.99 @ 171mph through the day, then later in the night suffered a leaking Boost pipe. Owners Jerry and Dan tell me they havent even started to push the motor yet, so another car with plenty more to come, and im sure that pb 7.80 will soon be slashed.
These cars should all be running at the up and coming Sydney Jamboree at WSID and by the looks of things have some unfinished business they want to take care of :)