High Oil Pressure 456 GT - Advice Needed ! - Ferrari Life
 
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post #1 of 4 Old 07-04-2004, 09:27 AM Thread Starter
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High Oil Pressure 456 GT - Advice Needed !

I was driving a 456 GT yesterday and the oil pressure at 5500 rpm was pushing the needle on the gauge above 10 bar (which is the max reading on the gauge). Any idea what coulfd be causing this and is it a major concern :-? (blown head gasket ) ???
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post #2 of 4 Old 07-04-2004, 06:58 PM
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Boxer,

Unlikely to be a head gasket problem, as any weakness which allowed combustion pressures into an oilway would also result in oil passing back into the cyls during the non-power cycles => you would be burning/losing oil noticeably.

In my mind it is either:
(a) normal (but it does sound too high), or
(b) a gauge calibration problem (ie reading inaccurately), or
(c) a pressure-relief valve malfunction. Oil pumps need to generate good pressure at very low rpm and so usually produce excess pressure at med/high rpms. I'm not sure what pressure blow-off system the 456 has, or how accessible it is but maybe it's a bit sticky.
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post #3 of 4 Old 07-05-2004, 11:04 AM Thread Starter
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4kids3fish, Thanks. Hopefully it is b or at the worst c. Appreciate the advice. Boxer42
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post #4 of 4 Old 07-10-2004, 12:26 AM Thread Starter
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It turned out to be B) and has been fixed. Oil pressure readings are perfect and accurate now. Thanks.
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