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I was replacing the timing belt in my 1990 Volvo 240DL. Got the belt on and all the timing marks are rite. Went to crank the engine and nothing. It cranks but doesn’t start. It sounds like it’s not getting any compression. I DO NOT HAVE A COMPRESSION TESTER so I can’t do a compression test. Is there another way to do a test to see if it’s getting compression with out a tester? If it helps any it’s a 4cyl SOHC 2.3L FI engine. It is getting spark and fuel I’m 100% sure that all the timing is correct also. Please I really need help with this one as I’m completely lost.
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Are you 100% sure you have all the timing marks right? Heres a pic of the timing marks I took from Mitchell1. Good luck.
One more thing.
Why did you replace the belt anyway?
Did it break?
If so then you probably have a bent valve(s).No I’m replacing it before it broke as I don’t know when it was last replaced and I’ve had one break before and it killed my engine. I’m going to have to check the timing tomorrow as I’m at home and the car’s at a friends house. Thanks for the illustration!!
Put the engine back to TDC and check the timing marks.
Then manually rotate the crankshaft with a breaker bar for 2 revolutions. After the final revolution, the timing marks should line up.
Not at at 2 RPM’s. Usually valves only really bend when the engine is revving high, or so I’ve heard.
Nah, the starter turns an engine at 300 rpm tops. It’s not going to bend a valve. Valves bend when they are floating down with alot of force and smack a piston moving in the opposite direction at equal force. I talked with Brian from Briansmobile1 about this a bit. His experience is that valves often don’t get bent unless the vehicle was accelerating when the belt let go. He said he will often throw a new belt on before pulling the heads in an effort to try saving the customer money. I’m curious how Eric feels about this now though.
Ok so I had the crank shaft at bottom dead center. I realized I was looking at the wrong mark on the crank shaft. I turned it the rite way and now it sounds great. Just gotta put it all back together.
Quoted From Trcustoms719:
I first hand have seen valves get bent from someone cranking and cranking
the engine with the timing marks way off (it was actually on a ’99 volvo xc70).
Also the RPMS that a starter rotates an engine at can vary from car to car….Ok, I believe you. I haven’t seen it personally, but you learn something everyday. It’s why I love this forum. I was thinking more along the lines of if you had the timing belt off a tooth or two. If it was backwards, then yeh, I can totally see that happening. Thanks for the heads up man. 🙂
Quoted From rhsimmons92:
Ok so I had the crank shaft at bottom dead center. I realized I was looking at the wrong mark on the crank shaft. I turned it the rite way and now it sounds great. Just gotta put it all back together.
Good job on finding the fix though man. Let us know how it runs when you get ‘er back together.
Beefy I’ve actually been told that a belt will snap during idle and startup believe it or not. And from my personal experience it’s true. I’ve had timing belts snap on me twice and both times it was after I took my foot off the gas to slow down going in to either a speed zone or going down a hill. But either way if none of the valves are bent then my car must be out of time. and if that’s the case then that would be great.
No, I can see how you misread it. I wasn’t saying timing belts don’t break unless the vehicle was accelerating. I was saying that Brian told me (us on his channel) that he often found that unless the belt broke during acceleration, valves didn’t get bent. Meaning, if the belt broke at idle, according to him, there was a good chance of no internal engine damage, and he would try a new belt before he pulled heads. Anyway, I know you said you don’t have a compression tester, but I found this:
http://www.autozone.com/autozone/access … ing=search
Autozone will rent these out for the price, and you get the money back when you return it. If you are sure your timing marks are set up right, the next step is a compression test. Although, I went back and re-read yer original post. This car ran before the timing belt replacement, right? Did you ever get around to double checking your timing marks? If not, do that first, then go for the compression test.
If you think you have a bent valve (which i doubt, more of a timing issue), i would recommend doing a leak down test –
Leak down test video –
http://www.youtube.com/watch?v=WgrfT0LF … t3EVppbf88
A compression test may also yield some results –
http://www.youtube.com/watch?v=X_tbksFY … ure=relmfu
The Chilton online we have a link to has alot of testing procedures too for the Volvo ignition systems.
You didnt damage the crankshaft sensor did you or forget to plug it in?
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