LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Whats wrong: timing or bent valves?

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Old Nov 23, 2004 | 08:52 PM
  #1  
SkillZ25's Avatar
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From: So Cal
Exclamation Whats wrong: timing or bent valves?

Recently my water pump was going out so I decided to replace/upgrade it. After I installed my new CSI electric WP I took it on a test drive and was driving it normal when all of the sudden it tripped out and it seemed like it went into N (so it revved up). After it went up to like 5K so I let off the gas and either I turned off the ign. or it died when the rpm's went down(I really dont remember).

Anyways it was a no start from there so I figured out my timing chain was broken.(and later found out some teeth on the crank and cam gears were broken off).

I fixed all of that and put it back together....still a no start...no fire from the opti....so I got a Delteq.... Intsalled great....Starts now!....but the idles at like 400 RPM and sounds like ****( sounds like its barely staying alive) .....bent valves from the timing chain break or did I install my opti wrong and the timings all messed up?
Old Nov 23, 2004 | 10:40 PM
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Re: Whats wrong: timing or bent valves?

Do a compression test...should tell you if any valves are not seating (bent)
Old Nov 23, 2004 | 10:48 PM
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Re: Whats wrong: timing or bent valves?

Was planning on that one. I will. But is there a slim chance that I just put my opti on wrong and the optical senser is broke?
Old Nov 24, 2004 | 02:59 AM
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Re: Whats wrong: timing or bent valves?

..bump
Old Nov 24, 2004 | 06:57 AM
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Re: Whats wrong: timing or bent valves?

I would say that you have VERY good chance of finding a bent valve(s)
Do a compression test. There shouldnt be alot of variance between cylinders.
If there are bent valves, might wanna worry about some valve to piston contact as well.
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