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84LX89GT · 12-31-2003, 04:16 AM

My oil pressure gauge now stands a bit over 1/2 all the time after installing a new crank, bearings and oil pump. It used to read 1/4 at idle and 1/2 under load, and although some of the bearings didn't look too good it never knocked or anything. I'd say it's normal. If you look at a chiltons book it says something like 40-60 psi at 2000 rpm. If you're getting down to 15 psi or so at idle your engine might be getting worn on the bottom end.
If you're concerned you can always add "liquid bearings"

(15W40 oil or 20W50 oil) to take up the clearances a bit and get pressure back up.

12-31-2003, 04:16 AM	#3
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	My oil pressure gauge now stands a bit over 1/2 all the time after installing a new crank, bearings and oil pump. It used to read 1/4 at idle and 1/2 under load, and although some of the bearings didn't look too good it never knocked or anything. I'd say it's normal. If you look at a chiltons book it says something like 40-60 psi at 2000 rpm. If you're getting down to 15 psi or so at idle your engine might be getting worn on the bottom end. If you're concerned you can always add "liquid bearings" (15W40 oil or 20W50 oil) to take up the clearances a bit and get pressure back up. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)