Question about 1998 GMC Sierra

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Oil psi just installed new stock short block in 1992 gmc has about 35 to 40 psi cold at idle warm about 20 to 25 at idle is this good? runs about 45 to 50 at 4500 to 5000 rpms has 70 miles on it?

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Yes that is fine for a stock engine u should have 10 psi for every 1000 rpm and oil grades and weather play a big part on oil pressure

Posted on Dec 27, 2008

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What should the cold start oil psi and the 190 degree warm up oil psi be on a 2000 to 2002 gmc Yukon with a 5.3 eng


Different engines can show different values. Sometimes it is the sensor itself that causes the variation. The pressures that you are witnessing are well within operation norms and are nothing to be worried about. As long as you don't experience severe drops in oil pressure during acceleration and deceleration, then the oil pressure system is working well.

Mar 03, 2015 | GMC Cars & Trucks

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2004 passat engine sounds like a deisel all of a sudden and has some engine lag


Hi, depending on engine fitted it is most likely the cam chain tensioner has collaped or failed. On a twin cam engine like a 1.8 t or a 32 valve V6 there is a chain driving a second chain in the rear of the cylinder head. These chains are tensioned by a oil pressure pressurized piston pushing on a bridge under the chain.

If it collapses, the chain/s become very loose and you will hear a loud clacking noise. It can also collapse due to low oil pressure.

VW is familiar with this problem and the repair involves first checking oil pressure, cold thro' warm. If it is around 85 to105 psi cold and 28 to 35 psi warm at idle, then this indicates tensioner piston is faulty or tensioner guide has broken off.

If oil presssure is good and engine is running synthetic oil...as it should ...then tensioneris suspect. I have also seen these engines with the screen under the tensioner partly blocked . If on removal of valve cover prooves tensioner has collapsed or guide shoe broken or warn then a new tensioner must be installed.

If oil pressure is too low at under 12 psi at warm idle then oil pump is worn and/or engine is worn. Also low oil pressure can be caused by fuel in the oil making it very thin.

If the screen under the tensioner is partly plugged up, then the oil pan must also be removed and cleaned out otherwise plugging will happen again.

To remove and install the tensioner a SST ( Special Service Tool.) is required to compresse the tensioner piston to allow it to be removed from under the cam chain and again compressing the new tensioner to be installed. Cams or chain do not need removing on this job.

Most import shops can handle this as long as they are equipped with the SST tensioner tool.

Nov 01, 2013 | 2003 Volkswagen Passat

1 Answer

1999 JIMMY OIL PRESSURE drops with RPMs after warm


Normal is 10w30.
If the oil pressure gauge is correct, my guess would be worn engine bearings and / or oil pump.

Jul 14, 2012 | GMC Jimmy Cars & Trucks

1 Answer

What is the normal oil pressure for a 2001 gmc jimmy 4.31 vortec v-6


25-30 psi at idle after engine is warm. 45-60 psi going down the road after engine is warm.

Aug 17, 2011 | 2001 GMC Jimmy

2 Answers

2006 chevy 2500 express cargo van .What is a good oil pressure for this van. it has 150,000 miles runs great


60psi cold / 30-45psi warm is ideal. I've seen (with that mileage) 45 cold/ 20 warm and that's acceptable - anything less start thinking about a new oil pump.

Mar 24, 2011 | 2006 Chevrolet Express

1 Answer

Oil pressure drops to zero when engine starts then goes to 60,while driving after warm,pressure drops down 4.3 V6 vortec engine


The 4.3 engine should have 20 to 30 psi at idle cold and around 50 to 60 psi running down the road. Has this engine had regular oil changes? If not the problem could be sludge build up. The oil pressure sending unit could be the problem. If in question about the sending unit install a mechanical gauge and watch the pressure.

Jan 02, 2011 | 1999 GMC Jimmy

1 Answer

1992 Ford F250 Truck with start and idle problem


Could be many things, Check the EGR valve and make sure its not stuck open, Oil pressure low is probably due to rough idle or low RPM. Also may have restricted cat converter.

Mar 16, 2010 | 1992 Ford F250

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I just bought a 2002 GMC 1500HD Crew Cab with 223,000 miles. The truck looks and runs like brand new. They were all freeway miles. The problem is this. When it first starts the oil pressure gauge is in the...


Nope, normal on start up is 60 PSI and once warmed up drops to 45 psi. Have the oil pressure checked for a proper reading during start up's when the engine is cold. As for the lifters ticking, that may be a sign that the engine was ran with low oil pressure or no oil and the lifters are damaged, or low oil pressure and the lifters are starved of oil. Try not to drive it and have a proper oil pressure reading, low oil pressure will damage the engine by having the main crank bearing to spin which is a engine replacement. Good luck and keep me posted.

Feb 09, 2010 | 2002 GMC Sierra C/K1500

2 Answers

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.

Apr 09, 2009 | 1992 GMC Sierra K1500

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Low oil when engine warms up gmc sierra 1995


30-40 psi of oil pressure is fine for many vehicles including your GMC. I am assuming that the truck has more than 100,000 miles on it and still has the original engine in it. By rule of thumb you only need 10 psi per 1000 rpms in a typical street driven engine to give adequate oil pressure to keep the bearings from oil starvation. The oil pressure is typically higher when initial start up occurs because it is more viscous due to the temperature of the oil as the engines oil warms up the visconsity thins out and the oil flows more smoothly. The drop in oil pressure is a normal occurance. Above 45 is more than required for a daily driven street engine. I believe that the specs on that engine only list 30- 45 psi.

Dec 07, 2008 | 1998 GMC Sierra

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