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oil pressure drops when engine is warm

 
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jsull60



Joined: 20 Mar 2010
Posts: 1

PostPosted: Sat Mar 20, 2010 5:19 pm    Post subject: oil pressure drops when engine is warm Reply with quote

engine runs great when it is cold. when hot the oil pressure drops to 0 at idle. it will go up to 20-30 at 4000 rpm. it used to run about 25 at idle and 40 at 4000 rpm. i just changed the oil and put 20/50 in it with a can of engine restore but got the same result on test drive. the boat is a 89 sea ray with a 454 engine. any thoughts????
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MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Thu Mar 25, 2010 9:04 am    Post subject: Reply with quote

Hello, how many hours are on the engine? Have you tried using a mechanical gauge to verify the oil pressure at idle? Cool
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