92 Buick Roadmaster

SEEKERR10

MEMBER
1992 BUICK

I have a 92 buick roadmaster, it has 121000 on the odometer. The motor was replaced with a 94 LS1. When the car is idleing it has no oil pressure, when the rpm's are up the pressure is ok. I took it to a shop and was told that was normal. Is it normal for oil pressure to drop to zero? I changed the oil and the pressure is ok for about a week and then it started acting up again. Could this be a bad pump or a sending unit? I was told the mileage on the replacement motor has 64000 on a fresh rebuild. It was taken out of a wrecked 94 Impala SS. I would welcome any advise or words of wisdom.

2 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Have you removed the sender and used a test gauge? Pressure should be at 5psi at idle.

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Monday, October 15th, 2007 AT 5:19 PM

SEEKERR10

MEMBER
2 POSTS

Yeah, it checked out good.
I noticed when removing the sender it was loose and only leaked when motor was at operating temp. Thanks alot for the help. I hope this topic will help someone else.