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Old 05-29-2011, 09:12 PM   #1
KyleL113
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Slight detonation still after overheat?

1969 with a 350 overheated today i heard the detonation before i saw the guage. After i let it cool and filled it up with coolant and changed the exhaust gasket that i think was the culprit it still detonates a little under load. any suggestions. No detonation before overheat.
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Old 05-29-2011, 09:37 PM   #2
Boog
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Re: Slight detonation still after overheat?

Find the reason for the overheat and correct it. Check timing. A blown exhaust gasket isn't the cause of overheating. Bad thermostat will.
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Old 05-29-2011, 09:40 PM   #3
fastwillie 696969
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Re: Slight detonation still after overheat?

check the inside of your distributor for condensation from the overheating ,could be cross firing from the water/
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Old 05-29-2011, 10:43 PM   #4
KyleL113
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Re: Slight detonation still after overheat?

the exhaust leak was not a small one. loading and unloading from the trailer high centered and pushed the header around a little. the gasket fixed the overheating but slight detonation ONLY under load. wouldn't cross firing happen at any rpm load or no load?
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