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Can a bent valve cause detonation?

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Old May 7, 2008 | 10:29 PM
  #1  
68chevypu's Avatar
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From: Stockton CA
Default Can a bent valve cause detonation?

As you can see from my sig Im not making the power I should be from a cam/bolt on car.

My tuner said it was because of timing he had to pull from detonation. The motor has been mechanically over-reved once and it bent a pushrod. Im wondering if I bent a valve slightly and its causing a loss of compression and detonation. I've done a compression check and everything was in the 170-180 range.

However I have read that compression tests wont always tell if there is a problem.


Also, I do not have access to a leakdown tester and wondered:

If I pull the valve cover and remove the rockers and set a ruler over all the valves tips would I be able to see a difference in height from a bent valve? Thanks alot guys.
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Old May 8, 2008 | 12:00 AM
  #2  
PREDATOR-Z's Avatar
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From: BFE
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No, visual check of a bent valve is difficult (unless seriously bent).
Yes a bent valve can cause detonnation, because it can leak oil in chamber.
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Old May 8, 2008 | 12:07 AM
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68chevypu's Avatar
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Launching!
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alright thank you, Ill try and track down a leak down tester.
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