: Oil pressure problem



unruley247
12-23-04, 02:37 PM
My 96 deville is giving my the damn flashing light and stop engine warning every so often sometimes days and week apart I have had the oil pump and oil pressure senor change. On the day when warning shows up rpm are around 700 when idle. I need help!!!!!!!!!! I hope I don't need Bearings Might junk if I do Because I Have 200000 miles on motor

sts96
12-23-04, 02:58 PM
Perhaps its time to switch to high milage engine oil or the next weight . Imagine at only 200k. lol sts96

unruley247
12-23-04, 05:08 PM
Do you think 10-40 can do the trick

sts96
12-23-04, 06:30 PM
I think loss of oil pressure at idle will do more damage than 10-40 ever would. lol sts96

dkozloski
12-23-04, 06:32 PM
I usually troubleshoot oil pressure problems by temporarily installing a known good gauge in parallel with an idiot light sensor and finding out what the problem really is. Then you can tell if it is a worn out motor, bad relief valve, or just a sender problem.

BeelzeBob
12-23-04, 11:14 PM
Try one of the heavy duty 15W40 oils such as Delvac or Delo or Rotella. The extra viscosity may help prevent the oil pressure warning light from coming on.

Was the replacement oil pressure switch an OEM part or a generic part from the autoparts store?? If it was a generic part you might try the OEM part as the set point for the oil pressure warning is specific to the Northstar.

unruley247
12-24-04, 10:05 AM
I don't know where switch was purchased but believe from car quest maybe i will get one from gm

dkozloski
12-24-04, 02:52 PM
As a last ditch measure there are oil pressure switches for trucks that are adjustable by exchanging shims under a spring.

BeelzeBob
12-25-04, 10:09 PM
I don't know where switch was purchased but believe from car quest maybe i will get one from gm


If it was anything other than a Cadillac Northstar specific oil pressure switch it will cause problems like you describe. Get the OEM switch.