Oil pressure

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Nov 19, 1999 | 11:50 AM

Joe

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Junior User

Joined: Jun 1999

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Oil pressure

I have a 78 F-150 with a 302, When I start my truck the oil pressure reads about 40psi when idling. But when the truck warms up the gauge drops to about 10-15psi when idling. Is this normal??

Thanks

Joe

Nov 19, 1999 | 12:12 PM

390fe

Fleet Mechanic

Joined: Jul 1999

Posts: 1,360

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From: Iowa

Oil pressure

This is normal for an older, high mileage engine.

Nov 19, 1999 | 08:28 PM

Big Red Ford

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Oil pressure

From my experience with my newly rebuilt 460 and the loss of oil pressure that I experienced when engine got warm was found out to be in the main bearings. I had too much clearance... (mine was due to machine shop errors). But from that experience, and if you have lots of miles on your engine... your main bearings might be getting worn out... hence, more clearance for you to lose pressure at. Good luck.