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Porsche 944 Timing Belt Failure BENT Valves

Porsche 944 Timing Belt Failure & subsequent results. Got a 944 Porsche 2.5lLiter 4 Cylinder. Unfortunately it has an interference head. Some mechanics tried to "fix" it not knowing what "interference" means. They replaced the timing belt and bent the valves even more. They gave up the 2nd time around. Good thing they never finished the job as it would not have worked anyway.


 


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Porsche 944 Timing Belt Failure BENT Valves PART 2.wmv
Porsche 944 rebuilt head installed & ready for start up





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.





E30 BMW 325i engine failure and after rebuild startup
My friends BMW engine failed here is some of the video we recorded and photos. I also included the first start up video.





What Happens When You Don't Change Your Oil Part 1
This is part 1 of what happens when you do not change your oil. This car is only 3 years old and has 135k miles on it.





Suzuki GSX-R Transmission Install & crankcase assembly
Suzuki GSX-R Transmission Install & crankcase assembly. In order to get to the gears the crankcase has to be deconstructed since it houses both the engine & transmission. This video shows parts of the reconstruction process.





Bent valves
This is what it means when a timing belt breaks.The valves bend after they hit the pistons.This is a test i use to determine quickly if severe damage has occured.A shop may use vacuum or simply rebuild the head as bent valves become obvious when refaceing them.Valves of a small stem diameter may not leak as the valve spring pressure pulls the valve straight enough to seal. But after repeated cycles of opening the head of the valve will break of destroying the engine. Also the valve guides are usually cracked in KIA HYUNDAI heads and the smalls pieces will go in the engine.I have seen guides cracked in all the 16 valve heads





Testing for Leaking/Bent Valves
--Please Read-- :) Some of the best advice I can offer you about fixing your car is to search for an online forum related to your car, or even for your specific engine. If you have a popular car or engine, this can be an amazing tool in diagnosing and fixing cars yourself! -------------------------------------------------------------- Directions 1. Get kerosene, gasoline, or break cleaner. 2. Tilt head on its side, with the ports of the valves you're testing pointing up and exposed. 3. Fill the intake or Exhaust ports with the liquid you chose, make sure to use enough liquid to cover the back of the valve head completely inside the port. 4. Look at the valve surface in the combustion chamber for leakage. (Let it sit for several minutes) 5. If there is a leak, you could have a bent valve or just a bad seal of the valve to the head. You might have to replace the valve, or just use some lapping compound to lap the valve/seat to resurface. 6. Repeat for the other side if you wish. 7. This is a great time to replace valve seals if you have noticed they are worn too much. 8. If you have any questions, please post them here and I'll try to answer them quickly. -------------------------------------------------------------- You just tilt the head on one side or the other depending whether you want to test the intake or Exhaust valves. I'm testing the intake valves in this video. I did this way because I didn't have the leakdown test equipment, but also because I wanted to replace my head gasket anyway. I wouldn't say this is the best way to test initially if you suspect leaking or bent valves because it requires you remove the head. Try just a regular leakdown test first. But if you're taking it off anyway it's pretty nifty and doesn't require the leakdown test tools. There are several methods to do this, this is just the one I chose in my situation.





15ft timing belt!
long and very expensive timing belt fitted, new front crank oil seal fitted, its going to run N/A for a while, even tho the power is only 280hp, the torque is 400ft/lbs!! so corner exit should be awesome.... might try to source a 944 lsd gbox , it would fit , but they are so expensive, but kirk wont stop badgering me if i dont!! i dont know, i think it might be too sideways with an lsd, i love drifting, but this golf has to be a grip machine....





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 leak test how to check for bent valves
i did this video to help some of you not get ripped off when buying a motor. i will be doing many videos of how to test parts and what to look for. please email me if you have question or what to learn how to test something else pls52202@yahoo.com or thinkperformancemotorsports@gmail.com





Porsche 944 Turbo - Watch This!
1986 Porsche 944 turbo - 2011 EURO CAR DAY CHAMPION! Engine performance: K26 Lindsey Racing turbo, cold air intake, Lindsey Racing 3inch Exhaust with magnaflow sport muffler, Lindsey Racing ignition wires, 3bar FPR, Lindsey Racing chips, shimmed wastegate, and a Lindsey Racing Boost enhancer set at 18 psi of Boost.





Timing belt failure..Bad result.!
Toyoya diesel...broken cam belt.





TIMING BELT FAIL
This is why you should check and replace your timing belt regularly





Snap-On Stud Remover on Porsche 944 Turbo Headstuds Demo.
Video demonstration of using a Snap-On Stud remover to remove the headstuds of a Porsche 944 turbo block.





DIY - how to change front main seal on a Porsche 944
Here's a tutorial on changing the front main seal on a Porsche 944 or 951.




Which car is faster? Which Car is Faster?





Similar 1/4 mile timeslips to browse:

1984 Porsche 944 Electric: 9.952 @ 130.900
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1987 Porsche 944 turbo: 11.437 @ 125.090
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1991 Porsche 944 Turbo: 11.742 @ 126.000
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1986 Porsche 944 Turbo: 11.987 @ 122.680
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1990 Porsche 944 Turbo: 12.139 @ 116.790
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1986 Porsche 944 TurboCup: 12.500 @ 117.000
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1986 Porsche 944 turbo: 12.670 @ 111.650
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1988 Porsche 944 Turbo Cup: 13.000 @ 110.000
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1988 Porsche 944 Turbo: 13.100 @ 111.000
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1986 Porsche 944 Turbo: 13.909 @ 108.420
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1983 Porsche 944 supercharged: 14.090 @ 98.530
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1986 Porsche 944 Turbo: 14.173 @ 100.600
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1986 Porsche 944 turbo: 14.553 @ 97.640
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1986 Porsche 944 Turbo: 14.800 @ 101.200
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