View Full Version : 95 Deville Oil Presure

04-07-05, 03:32 AM
Hi I have a 95 Deville w/ 140k i had a light tap for a fiew days then the low oil pressure light came on Found I had a bad oil pump. Now I changed it and I have what sounds to be valve noise and have no idea what caused it. It almost sounds like I have no Oil going into the valve covers. Please help

09-30-05, 09:58 PM
update the tapping went away I think it was the lifters. It still comes up with the low oil pressure. I changed to the rolletta 15-40 and still get the message. Replaced thermostat w/ a 180 and bolth radiator fans. Is there anything else that can cause this?

10-01-05, 10:08 AM
Make sure there are no leaks from the oil pressure sending unit.

10-04-05, 12:13 AM
There are no leaks by the sending unit there seems to be one by the front "by the crank" of the engine although I cant find it

10-04-05, 09:54 AM
Make sure the harmonic balancer bolt is torqued appropriately. The oil pump is driven by a compression fit between the balancer and the oil pump, so if the bolt is loose, there will not be enough friction to drive the oil pump.

10-16-05, 12:48 PM
The bolt is torqued correctly is it possable that that fiting is worn?

10-16-05, 02:39 PM
At this point it you should hook up a mechanical pressure gauge to see the true pressure. It might just be a bad sender.

Most new cars run less oil pressure than older cars. Normal bearing wear may be dropping your pressure below the threshold of the switch. Put a mech gauge on to be sure.

10-16-05, 03:16 PM
I have a mech guage on it already at idle the guage varys from 0-5psi at 2500 it is roughly 20psi