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Noticed my 92 350 had low oil pressure... I changed the oil and filter and the pressure jumped up to 30psi at idle for about 15 mins.. Now it's at 6 psi at idle... Is that ok???

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  • Expert
  • 149 Answers

Too low for idle. Your engine has too much clearance in the bearings I'd say.

Posted on Dec 04, 2014

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Posted on Jan 02, 2017

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philw1964200
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SOURCE: oil pressure light on

Yes I believe there is!! I can't think of it right off hand.I will look it up and get back to you. Also have you checked to see if your spark plug seals are worn. I am replacing mine now.I had an issue with the engine light coming on at certain revs!!!

Posted on Jan 06, 2009

  • 117 Answers

SOURCE: Chevy suburban 2000 5.3 low to no oil pressure at idle

maybe a dumb question, but have you checked the engine oil level (not trying to be rude) . if you have check the type of oil filter you are putting on. But you mention tapping noises....do they increase slightly as engine rpm increases then dissapear. if so, i would wager that the noise you are hearing would be the hydraulic lifters. the reason you hear them is that they are not getting a sufficient amount of oil pressure...your oil pump might be dead or dying...would go that route.

also, ensure that you are using the correct weight of oil in your vehicle (follow manufactures recommendations)

hope this helps.

Posted on Jul 08, 2009

  • 145 Answers

SOURCE: 99 Jeep Grand Cherokee 4.7 Oil Pressure reads 40

I'm having the same problem. Did you get yours fixed?

Posted on Jan 12, 2010

  • 59 Answers

SOURCE: low oil pressure 93 GMC P/U w/350 motor w/205,000 miles gauge

While engine is running, open the cover where you add oil to engine and see if you see a good flow of oil, if good flow, could be as easy as replacing oil sending sensor. got to realize that if poor maintenance history your engine may not be building enough pressure at iddle to move your hydraulic operated valves, only when you rev it up it will pump enough to run smooth. if running engine too long, you may cause more damage to other engine components such as crankshaft and cam shaft bearings. if you can spare a few bucks, have a good mechanic check your oil pressure with a mechanical gauge. another cheap option is to replace oil pump. last resort if you love your truck as much as we do,replace engine or rebuild it. At 205,000 this is a normal symptom, other than timing chain problems, most engines don't make it that far. hope this helps!

Posted on Mar 01, 2010

  • 1 Answer

SOURCE: 1996 oldsmobile aurora oil pressure

The Aurora is a low pressure oil system. The only solution available at this time is to increase the oil weight. I went o straight 30W to solve the idle alarm issue. Some use 20W oil and that works too.
With 20W you will be at 80 to 90psi cold then drop to 20-30psi hot.
I first replaced the oil pressure gauge and it was worse. I put the original back in and it was better. Then went to 30W and all is fine.
Running it that way for a few years now.

Posted on Apr 03, 2010

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Dec 15, 2010 | 1989 Chevrolet Celebrity

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I have just changed the oil in my 87 gmc Vandura . The oil pressure if fine but after I run it for 30 min or so and come to a stop the oil pressure gauge drops to say no pressure. ...


If this is a new problem since the oil change the oil or filter are the cause. Filters do fail and is between the pump and the pressure sensor most times. So if there is a restriction in the filter the pressure will be low at idle. Replace the flter and see. There is a chance the sensor failed coincidently to the change too. A direct read of the pressure with a gauge will prove that. If you hear any ticking or tapping turn of the engine.

Feb 10, 2010 | 1987 GMC VanDura

1 Answer

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engine oil pressure may be low remove oil pressure sending unit and install a pressure gauge check for pressure while warm if pressure is ok replace oil pressure sending unit oil pressure at idle should be between 5-15 psi at min

Nov 17, 2009 | 2006 Dodge Stratus

1 Answer

'92 GMC PU has low oil pressure


With that kind of maintenace pump and bearings should be ok,the oil pressure sending units get weak on these models I have replaced alot of these for this same condition.The check engine light reads its voltage from the sensor.

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My jeep has the straight 6 and 260,000 miles. The oil pressure appears very low while at idle. However when I accelerate, it comes up. It is running fine, but I know oil pressure issues can be a potential...


well this is pretty normal for the mileage you have i suggest you switch to a heavier weight oil or what i do is add a quart of lucas oil treatment with each oil change that stuff is amazing i have seen it stop oil leaks and stop smoke from the tail pipe and it will raise your oil pressure 10 to 15 psi.

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I have a gmc envoy (same thing) and it does the same thing. normal.

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Low oil pressure reading 1990 jeep cherokee laredo


If this is a high mileage vehicle, say 180k or higher, treatments are not going to help. As mileage increases, the tolerances and clearances in the mating parts increases. This will lower oil pressure. I have a 90 Safari with 192K. Oil pressure was identicle to yours. I put new rod and main bearings in it and now it never goes below 40 psi, even when hot and idling. I tried additives and all I got was more trouble, It started smoking and using a qt. of oil every 300 MILES. I put valve stems seals in and it helped alittle but not near enough. It is now parked and driven only when have to. This is a result of the previous owner of my vehicle not changing oil at regular intervals and overall poor upkeep of it.

Good Luck

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1996 oldsmobile aurora oil pressure sensor says low oil pressure my mechanic checked it out and replaced the oil pressure sensor and problem still exsists he tested the oil pressure recommended 20 PSI when...


The Aurora is a low pressure oil system. The only solution available at this time is to increase the oil weight. I went o straight 30W to solve the idle alarm issue. Some use 20W oil and that works too.
With 20W you will be at 80 to 90psi cold then drop to 20-30psi hot.
I first replaced the oil pressure gauge and it was worse. I put the original back in and it was better. Then went to 30W and all is fine.
Running it that way for a few years now.

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1 Answer

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Dan,
If your oil pressure actually dropped below 10 psi at idle, your hydraulic lifters would start to collapse. This would cause them to "tick" or "click" at idle. If you are not getting this clicking, change the sending unit.
Charlie

Jul 15, 2008 | 1989 Chevrolet Suburban

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