[RESOLVED] Cam gears off 2 teeth, jumped timing..

[EricGRIT09]

Ok so I guess what I'm looking for here is for someone to just go over my situation and tell me if I am approaching it correctly.

I was accelerating from a stop light, ~50% throttle, when my car just cut out in first gear at about 20mph. No really strange noises, just stopped running.

When I go to crank the engine, it doesn't even try to start up. It turned over fine, but did not start at all. I checked the cam gears and the timing is off 2 teeth there.

My game plan right now is that I have a timing belt, tensioner and pully kit, and a balance shaft belt ready to go on. I'm hoping that I didn't bend any valves, and I know its a crapshoot, but what do you think my chances are of just being able to re-do the timing and having everything turn out okay? Also, is there anything I should be doing right now other than what I listed?

Thanks in advance.

 

[Joshuah Stedman]

Not sure about the prep you should be doing, but this has happend to 2 of the 3 ppl i know that had this happen to them (bent valves). If they are bent, PM me and ill tell you the redneck way on how to fix bent valves w/o buying new ones haha

 

[Project90Talon]

The 4G63 is an interference motor. If your timing jumped, you bent valves.

 

[Insane Performa]

compression test it and you'll know if you have bent valves. My timing belt broke at like 30mph in 3rd gear one morning after along night of drinking with a bad hang over and it bent almost every valve. 2 teeth you might get away with no bent valves. But you need to figure out why it jumped.

 

[Fabian]

compression tests dont always tell you if you have bent valves because they could be so minorly bent that the compression doesnt leak out fast enough. I've actually jumped timing and survived without bent valves. But I think that was a once in a dsmer's lifetime kinda thing...since you're in there already you should just do a balance shaft elimination too. That will save you headaches in the long run. And you're already there so why not? PM me if you wanna know where to get the elimination kit for $15

 

[BogusSVO]

a quick test for bent vlaves, with the head on the car and no T-Belt.

Remove the VC, and spark plugs, remove the cam tower caps and cams. with the cams removed all the valves will be closed.

then using your compression test hose, apply compressed air into the cylinder, then listen at the TB and exhaust for air leakage.

If you hear the air comming out the TB...you have bent INT Valves, and if out the exhaust, bent Exh Valves

 

[99rtguy]

yeah, take the valve cover off and see if there are any cam lobes that arent touching the lifters, or if the valve springs are compressed when they shouldnt be. we've got an aveo in the shop here that had the timing belt go, bent every valve, bad too

 

[tljohnson1]

You have a 50/50 shot of having bent valves. My tensioner gave slack at about 25mph and the timing belt jumped 2 teeth and i had no valve damage. Since it was not a drastic timing jump you have a decent shot that your valves are still in good condition.

 

[Nvisabl]

a quick test for bent vlaves, with the head on the car and no T-Belt.

Remove the VC, and spark plugs, remove the cam tower caps and cams. with the cams removed all the valves will be closed.

then using your compression test hose, apply compressed air into the cylinder, then listen at the TB and exhaust for air leakage.

If you hear the air comming out the TB...you have bent INT Valves, and if out the exhaust, bent Exh Valves

instead of taking it all apart just do a leak down after fixing the Timing belt . no need to remove cams ect ect ..Also remove schrader valve from your compression hose

 

[EricGRIT09]

Hey thanks for all the replies.

I haven't been able to get back to my car to work on it, so hopefully this week I will finally get the chance. I took a quick look at it last week, and the timing is totally off. When the exhaust cam gear is at 3 oclock, the intake is also at 3 oclock.

So, got some new valves, and hopefully with a new full timing job and valves, headgasket and bolts, I will have a running car again.