Oil pressure problem
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Senior User
Joined: Mar 2003
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Oil pressure problem
I bought an 88 ranger with a 2.9 two weeks ago and now I am having oil pressure problems. When at a warm idle the oil pressure dummy light starts to flicker until i rev it up, and now I think I amn hearing the lifters tapping 
, I was thinking maybe installing a k&n oil filter because they have helped gain oil pressure in my other rigs and switching to a heavier oil like some 15w-40 delvac which I have pleanty of. Please help, I have worked all summer to buy this truck and now I need to make sure I dont mess up the motor. Thanks to all who reply.
P.S. The truck never did this the first week I had it.
, I was thinking maybe installing a k&n oil filter because they have helped gain oil pressure in my other rigs and switching to a heavier oil like some 15w-40 delvac which I have pleanty of. Please help, I have worked all summer to buy this truck and now I need to make sure I dont mess up the motor. Thanks to all who reply.P.S. The truck never did this the first week I had it.
Fleet Mechanic
Joined: Dec 2003
Posts: 1,436
Likes: 117
From: Virginia
I have an 88' 2.3L that always reads fine while driving, and when it is first started. But it is low at idle and when warmed up. I also don't have a real gauge but I did find where some of my pressure was being lost.
If you check your valve cover gaskets and oil pan gasket for leaks you may find where some psi is being lost. I also had some old cracked hoses that didn't help either. I have replaced all but the oil pan gasket, and the pressure improved, but not quite normal yet.
If you check your valve cover gaskets and oil pan gasket for leaks you may find where some psi is being lost. I also had some old cracked hoses that didn't help either. I have replaced all but the oil pan gasket, and the pressure improved, but not quite normal yet.
New User
Joined: Sep 2004
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Putting in the heavier weight oil will give you higher oil pressure but the root cause of your problem is most likely worn crankshaft bearings. If you continue to have low oil pressure you will need to replace them.
Randy
Randy
