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

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.


 


More Videos...


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.





Porsche 944 S2 How to replace water pump, timing belts and shaft seals
нажмите CC и выберите русские субтитры for English titles press CC The video gives a tutorial how to replace the water pump, all belts and the shaft seals on a Porsche 944 S2. Das Video gibt eine Anleitung zum Wechsel der Wasserpumpe, aller Riemen und der Simmerringe bei einem Porsche 944S2 Видео представляет наглядное пособи о том как заменить водяной насос, все ремни и прокладки уплотнения валов на Porsche 944 S2.





Porsche 944 engine assembly - cylinder head
Assembly of the cylinder head for a Porsche 944. This is where I install the valves, put the head on the short block, and put on the camshaft. If you have a 928, just do this twice!





Porsche 944 engine damage part 1/2
Repair of a Porsche 944 S2 cylinder head, destroyed by a broken secondary timing chain.





Timing Belt - the Forgotten Belt (by Dayco)
Timing Belt - the Forgotten Belt. This video stresses the importance of checking and following the manufacturers recommended replacement interval for the timing belt. Along with recommendations to replace the "hardware" associated with the Timing Belt (Tensioner, Water Pump, and Idler Pulleys) at the same time the Timing Belt is being replaced. To find out more information on our Timing Belt, Timing Belt Kit, Water Pump Kit, and Timing Component Kit, visit www.daycoproducts.com





Porsche 944 12 sec run
My porsche on MC39 Dragrace where I manged to clock 12.089 on 1/4 mile with 201kmh trap speed.





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





Timing Belt Change Porsche 944 - Video #2.wmv
This is the second in a series of videos detailing the installation of timing and balance belts on a 1983 Porsche 944





Timing Belt Change Porsche 944 - Video #7.wmv
This is the seventh in a series of videos detailing the installation of timing and balance belts on a 1983 Porsche 944





Porsche 944 engine damage part 2/2
Repair of a Porsche 944 S2 cylinder head, destroyed by a broken secondary timing chain.





What's inside a 944 engine
I'm getting ready to build a Porsche 944 engine, and thought I'd explain some of what I do.





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





1994 Honda Accord w/ Bent Valve
A video illustrating how your 94 Accord's engine will probably sound if it has a bent valve. Bent valves often happen in cars containing intereference engines, such as this particular model of Honda. They occur most often when the timing belt breaks during operation of the engine. This is an expensive repair, requiring the engine head to be dismanted. To avert this disaster, change your timing belt every 90k miles or sooner. This particular car had about 178k miles on it at the time of the video. There was a bent valve in cylinder 2, and the cylinder lost all compression.





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.





Which car is faster? Which Car is Faster?




Similar 1/4 mile timeslips to browse:

1984 Porsche 944 Electric: 9.952 @ 130.900
Lowell Simmons, Engine: 2- 11, Tires: 275/60/15 Mickey Thompson ET Streets


1987 Porsche 944 turbo: 11.200 @ 130.900
Sid McMullen, Engine: 3.0, Turbos: holset hx 40super Tires: BFG drag radials


1991 Porsche 944 Turbo: 11.742 @ 126.000
Frank, Engine: Porsche, Turbos: K26-8 Hybrid Tires: 10x16 Avon


1986 Porsche 944 Turbo: 11.987 @ 122.680
Bruce, Engine: 2.5 Liter, Turbos: Turbonetics 60-1 Tires: Nitto NT555R


1990 Porsche 944 Turbo: 12.139 @ 116.790
Frank, Engine: 2,5 Liter, Turbos: K26/8 Hybrid Tires: 10x16


1986 Porsche 944 TurboCup: 12.500 @ 117.000
Peter, Engine: 2500cc Turbo, Turbos: K27/8 Tires: Yokoham 048R


1986 Porsche 944 turbo: 12.670 @ 111.650
tms951, Engine: 2.8 stroker, Turbos: 60-1 hifi Tires: 275/40/17 Bridgestone RE750


1988 Porsche 944 Turbo Cup: 13.000 @ 110.000
Roger Barcelo, Engine: 2479 cc Inline 4 (M44/52), Supercharger: none Turbos: KKK type K27#8 Tires: N0 Toyo


1988 Porsche 944 Turbo: 13.100 @ 111.000
PiperP, Engine: 2.5L 4 CYL 8:1Comp, Supercharger: NO Turbos: 60-1/8 Tires: Stock


1986 Porsche 944 Turbo: 13.909 @ 108.420
Scott Story, Engine: 2.5L 4Cly, Turbos: KKK K27-DR Tires: BFG CompT/A ZR 225/


1983 Porsche 944 supercharged: 14.090 @ 98.530
Sid McMullen, Engine: 2.5, Supercharger: eaton M90 Tires: cheap


1986 Porsche 944 Turbo: 14.173 @ 100.600
Bob, Engine: Stock Mechanicals, Supercharger: - Turbos: Stock K-26 #6 Tires: 225/50/16 Summitomo HTR+


1986 Porsche 944 turbo: 14.553 @ 97.640
Bob, Tires: Potenza re-750 245/45/16


1986 Porsche 944 Turbo: 14.800 @ 101.200
Drew Roberts, Engine: 2.5l, Turbos: k26/6 Tires: goodyear f1 gs d3


1986 Porsche 944 Twin Super Charger: 14.880 @ 96.120
Mr. J, Engine: stock 2.5L 217-horse inline-4, Turbos: yes, single Tires: 225/50VR-16


1987 Porsche 944 S: 15.200 @ 98.000
Todd, Engine: 2.5L,


1985 Porsche 944 : 15.990 @ 94.750
KIKI, Engine: 4 cylinder, Supercharger: no Turbos: no


 


©2014 DragTimes - Disclaimer - Contact Us