Question about 1997 Oldsmobile Aurora
When fully warmed up, my Olds Aurora V8 gives me an in-dash and audible low oil pressure warning at low rpms (traffic signals, stop signs, idle) and immediately goes off when I resume higher rpms, usually around 1,000. It registers 8 psi at idle intil it drops at low rpms and alarms go off. Help, please, it's driving me nuts! I've replaced the Oip pressre sending init and sensor (switch). thanks. Paul in OKC, OK
Thicker oil is all you need. 5w30 is too thin when it warms up and the sensor cant pick up the flow going past. 10w40 should stop all the issues
Posted on Apr 21, 2010
The problem is that the upper pan seal, it's an aluminum plate and seals various oil passages has lost it ability to seal. It has factory installed RTV seal in groved locations. It needs to be replaced and is a major job, since the motor needs to be dropped out. Use 50 weight oil until you want to spend the money to had done
Posted on Feb 17, 2011
As suggested by your expert, I changed the oil pump & it turned out to be functional (the old one), but weak, as your repair guru thought. Thanks!
Posted on Jul 08, 2008
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Posted on Jan 02, 2017
Here's a few things to check out. First, you need to know if the oil pressure is correct or not. You can figure this out by removing the sensor and replacing it with a manual oil pressure gauge for testing purposes. If you find that the manual gauge is showing higher pressures, you can breathe easy and start looking at your instrument cluster for the problem. If, however, your oil pressure is reading the same, you need to figure out why your oil pressure is so low. One thing to check out, is to change out your filter, especially if it's a brand other than GM's AC Delco. Some filters are TOO restrictive, and can cause low oil pressure issues. Secondly, the viscosity of oil that you use can make a difference as well. As engines get older, and acquire higher mileages, they wear down a little. This makes larger gaps for oil to pass through, thus allowing your oil pressure to lower. For higher mileage vehicles, it's recommended to go with a slightly thicker oil, which will combat this problem. If these don't bring your pressure up enough, you may have to consider replacing your oil pump. This is more involved, as you must take the pan off the engine, and that can be a pain sometimes. You may opt for a higher volume pump, which would compensate for your increased tolerances. Hope this helped you out!
Posted on Oct 23, 2009
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