low oil pressure at idle
#1
Instructor
Thread Starter
low oil pressure at idle
Went for a drive today, about 90 degrees in Columbus. Noticed at an idle the oil pressure dropped to 14. oil temp and coolant temp both about 225. Oil level is full. 87,000 miles.
Had this problem last summer when it actually dropped as low as 12. changed to 10w30. Looks like that didn't help much.
Any suggestions would be greatly appreciated.
Had this problem last summer when it actually dropped as low as 12. changed to 10w30. Looks like that didn't help much.
Any suggestions would be greatly appreciated.
#5
Oil Pressures
First I think I would change back to 5w-30 synthetic. Then here is the pressures right out of the manual for a 1997. Possibly they may be different for different years. maybe someone could chime in for your year. I also just needed to install a new oil pressure sensor from Autozone, it was a Brass Borg-Warner one and noticed my pressure were slightly different then when the original GM sensor was in.
6.0 psig at 1000 RPM
18.0 psig at 2000 RPM
24.0 psig at 4000 RPM
6.0 psig at 1000 RPM
18.0 psig at 2000 RPM
24.0 psig at 4000 RPM
#6
Instructor
Thread Starter
It might just be normal, i get good pressure at higher rpm's. mine is a 2000 by the way. It's due for a change, so I probably will go back to the 5w30 (mobile one). Thanks for the response.
#7
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Wounded Warrior Escort '11
Even with my super high-mileage '99, the oil pressure in hot temps and with the engine hot, only got down to 19 psi. As stated, minimum is 6 psi. The dealer or mechanic can do a mechanical oil pressure test to verify. Your's getting down to 11-12, I'd be concerned. You might want to pull and replace the oil filter and cutting open the removed filter to check for metal bits trapped within. If you find none, that would obviously be a good thing and good for the peace of mind.
#10
Instructor
Thread Starter
Sorry for not staying up with my own post. Can't tell you what brand the filter is, had it done at the local oil change place. It is Mobil One oil. The problem has occurred over a couple of oil changes. The first was done by a local guy who did some other work on the car. I am about due for another change. What filter would you suggest?
#12
Drifting
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USING 10-30 IN MY CAR, so its not the oil
any ticking noises?
i would have a mechanic put a mechanical oil pressure tested on it and see if the sensor is reading bad or you have another issues like failing oil pump.
any ticking noises?
i would have a mechanic put a mechanical oil pressure tested on it and see if the sensor is reading bad or you have another issues like failing oil pump.
#13
Instructor
Thread Starter
Thanks again guys, already did the sending unit replacement. Getting good pressure with rpm, 30's - 40's at normal driving speed. About how much to have someone replace the oil pump? ballpark,,,,
#14
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St. Jude Donor '09-'10-'11
Chances are a new oil pump would give about the same pressures. With 88K miles, hot weather your idle pressure sound fine as long as it comes up to a higher value off idle. One way to get higher oil pressure is to drop in a new LS2 or LS7! That would be my choice over just and oil pump!!
#19
Safety Car
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That amount of oil pressure is normal and should be no problem at all.Electronic oil pressure gauges arent all that accurate.LOL, if you are planning on a replacement,quit worrying and drive her til she blows!
#20
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mine c5z is a 2001 and the normal was around 35psi at idle and it has
80k on it. Just did a cam and mellon oil pump now its more around 45-50 at idle. Sounds a little low for me but thats just my .02 cents.
80k on it. Just did a cam and mellon oil pump now its more around 45-50 at idle. Sounds a little low for me but thats just my .02 cents.