Question about GMC Sierra 1500

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Oil pressure relief valve

Oil pressure drops to 0 at idle when warm

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  • GMC Master
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If you don't have an oil pressure test kit to measure actual engine oil pressure, try replacing the oil pressure sender 1st and recheck. Its the cheapest and easiest to do .

Posted on Dec 29, 2013

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Posted on Jan 02, 2017

Mikey108
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SOURCE: OIL PRESSURE RELIEF VALVE

If cleaning the engine does not work, replace the oil press. sending unit. These senders on Jeeps have had a history of problems where they will work one day and not the next day.

Posted on Jan 27, 2009

  • 64 Answers

SOURCE: changed oil pressure switch,still no oil pressure

The fuel pump on that model runs through the oil pressure switch so that if the truck looses oil pressure,It kills power to the fuel pump to prevent engine damage.you need to find the cause of the low oil pressure reading(possibly a bad oil switch).That would be the cheapest place to start,or have it checked with a mechanical gauge.Good luck,
ChevRev

Posted on Mar 30, 2009

  • 14 Answers

SOURCE: 1992 gmc chevy 350 wont idle when warm

This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

Posted on Apr 17, 2009

VWdan
  • 114 Answers

SOURCE: oil pressure drops to 0 at idle

OOO not good sounds like some of the head gasket got stuck somewhere, or the gauge or sender is bad or got knocked around when repairing the head gasket. I would check that first. If that checks out will need to drop the pan to see if something got stuck in the pickup tube,might as well change the pump while you are there. Or worst case some thing wrong with gasket job impeading oil flow back to bottom of the engine. Was the oil and filter changed ?if so pull out filter and see if an chunks are stuck in it now. And change oil and filter again. Sorry that was out of order I had a long day

Posted on Apr 24, 2009

  • 6982 Answers

SOURCE: 2002 jeep wrangler oil pressure gauge drops

When the gauge is at 0, is there any noise from the engine (tick, knock etc?) I would have someone put a mechanical gauge on there and read true pressure.Your driving pressure seems OK but if the low number is "real" something is wrong!

Posted on May 30, 2009

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1 Answer

Oil pressure on my 1991 Nissan sometimes drops to about 5 psi at idle when at operating temp. Other times it will drop to a more normal 25-30 psi. Is there is a high pressure relief valve sticking?


5 psi then 25 -30
what are these readings from ..an after market oil pressure gauge ?
oil light should come on if 5

what make of nissan
how many miles/kms on the clock

would first replace oil pressure sender
oil pressure relieve valve on the oil pump sticking is a possible
oil lower W rating used too thin at the moment
clogged oil filter or sump pick up
oil pump worn or
main bearings worn

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1 Answer

Oil pessure drops to 0 when engine warms up


it appears that the pump pressure relief valve is stuck and is not sealing off the oil system to allow pressure to build up at idle. It may be necessary to remove the oil pump and pressure relief valve for checks /repairs.

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The oil pressure drops to zero at idle. The pressure goes to normal when the car is moving. Is there a problem with the oil pump?


at idle ,what regulates oil pressure ,is the clearence, in the pump, itself, off idle the relief valve, ,regulates ,pressure, let me know if you have a pump,put in it, pull the old pump, apart, see if the spring for the relief ,,bypass, valve is broken, i have had a few ,issues with ,gm, pumps,

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Dodge 2.7 I'm losing oil pressure after car warms up. When starting pressure is reading on manual gauge 60 PSI. Once it warms up it drops to Zero. New oil pump, oil pan and pickup tube clean. Any...


The first stop is to measure the pressure with an external gauge. if the readings are the same, surgery is needed, I would look at the oil pressure relief valve for foreign particles.

It takes resistance to make pressure, and your decsription does not sound good. If the pressure is actually dropping, and you find no issues with the oil pump and pick up, you need to measure bearing clearances... Essentially, everywhere oil is pumped needs to be inspected...

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Oh my!! I'm guessing the "oil pressure relief valve" is stuck open. Does the motor sound OK no knocking or ticking? The "oil pressure relief valve" is built into the oil pump.

Jan 03, 2010 | 2002 GMC Sierra C/K1500

1 Answer

No oil pressure at idle once motor warm


Re-new the engine oil and see if the problem persists.
Low oil pressure at idle is usually a sign of a worn motor - worn camshaft and crank bearings allowing excessive oil to pass.

Oct 09, 2009 | 1989 Pontiac Firebird

1 Answer

Overhaul of the top in of 2003 jeep 4.7. It had jumped time, broke a valve spring and bent a valve. After the overhaul oil pressure at idle drops to 0 after the engine warms up. No engine noise what so...


First thing you need to do is put a mechanical gauge in place of oil sender and read actual oil pressure. If mechanical gauge shows same condition, take a look at the connecting rod bearing serving the cylinder where the valve bent. If the piston hit the valve hard enough it may have created a flat spot on the bearing that is permitting oil to bypass the bearing, That won't knock right away because the bearing is still supporting the rod, unlike when the bearing bore has worn all the way around, and is loose. Bearings are made from soft metal, so that they can absorb a certain amount of dirt without damaging the crank. Being soft, they can easily be deformed.
If mechanical gauge shows no problems, just replace the original sending unit with a new one..

Aug 06, 2009 | 2003 Jeep Grand Cherokee

1 Answer

Oil pressure drops to zero after warmed up or below 2700 RPM


Check the oil pressure with a test guage, if the finding are the same, the look at your oil filter, pump, pickup, or pressure relief valve.....

Jul 18, 2009 | 2002 Isuzu Rodeo

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1998 FORD 4WD RANGER 128,000 MILES ENGINE LOST OIL PRESSURE OIL PUMP LOOKS GOOD NO SLUG IN OIL PAN, WHY?


Most likely your oil pressure relief valve located on in or nearby pump. Symptoms are oil pressure will drop when warmed up when idle lose all pressure eraticly giving the vehicle gas will bring back pressure and highway driving will bring pressure up until idle again.

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1 Answer

Low oil pressure indication in suburban


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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