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96 Bonneville Oil Pressure/Engine Knock problems

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Old Apr 2, 2012 | 09:12 PM
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Harmonic balancer won't cause the oil pressure to drop. Unless you were revving 7000rpm and the balancer went unbalanced and fubard the crankshaft.
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Old Apr 2, 2012 | 09:16 PM
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There is something interesting....I turned on the car just now and the noise is gone. So obviously the noise only comes when the oil pressure decreases.(Which means the oil gets to thin)

I also revved it and I did not hear any knocking/ticking. So I revved it really heard to 4k and I heard the slight knock.

Maybe there is a slim hope it could be something else. (I doubt it though)
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Old Apr 2, 2012 | 09:17 PM
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Really wish there was a edit button on these forums.

Anyways, seems like replacing oil with thicker oil might actually work.
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Old Apr 2, 2012 | 09:19 PM
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Reason why I say replacing oil with a much thicker oil will help is because this will give the engine more time to stay at a stable oil pressure and engine knocking won't occur as fast.
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Old Apr 2, 2012 | 09:20 PM
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Just mind baffled that the knock and tick is totally gone.
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Old Apr 2, 2012 | 09:22 PM
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Let it run for a few minutes. Betcha it will come back.
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Old Apr 2, 2012 | 09:24 PM
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We'll I would assume so because the oil gets to thin as the engine gets hotter.
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Old Apr 2, 2012 | 09:27 PM
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The bearing clearances also increase due to thermal expansion. They are usually quiet when cold, but get louder as the heat increases.
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Old Apr 2, 2012 | 09:28 PM
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Just wondering how thick of oil I should go. 15-40 or 20-40 or 10-40
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Old Apr 2, 2012 | 09:31 PM
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I know alot of car dealers the sneaky ones will put straight 30 or 40 in vehicles to make them quiet.
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