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Acceptable Oil Pressure Ranges?

What range should my oil pressure be?

Acceptable Oil Pressure Ranges?

Postby HighSpeed [OP] » Aug 25 2012, 1:51am

2012 Silverado 1500 LS 4.8, approx 3500 miles.

I've been having a problem with an intermittent ticking sound coming from my engine. (Sounds like this: http://youtu.be/EMSVCSnHZQU )
I took it to a dealer today since it's still under warranty. They believe that the noise is being caused by the oil pump and are going to replace it under warranty. The part won't be in until next week. I'm concerned continued usage could cause engine damage, but the dealer said it should be fine.

My question, since I'm paranoid, what are acceptable oil pressure ranges? I'm also constantly checking my oil level to make sure I'm not losing or burning any. Any and all advice would be appreciated.
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Acceptable Oil Pressure Ranges?

Postby Mikez94 » Aug 25 2012, 2:16am

well on my truck my idle is at 40. but when i really get on the throttle its at 60. its a 2000 silverado 5.3L
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Re: Acceptable Oil Pressure Ranges?

Postby Machster69 » Aug 25 2012, 2:54am

I got to be honest with you, that noise doesnt sound like a lifter noise. They might be correct with the oil pump though I have never heard of anyone with that type of noise due to a pump. I can tell you there are many ticks these motors can make and I would classify yours are serious. That said, I would not continue to use the motor until the dealer gets to it. Wanna see a bad gm oil pump? You know what happens to your motor if this happens? The same thing that happens when your heart stops. The damage is irreversible! The good news.... your very very covered under warranty... worst case scenario, youll get a new truck if they can not fix it. Part of the lemon law. They can only try to fix it so many times... Being that there is a definite issue, I doubt GM trying to deny you so... My vote... dont run it!
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Re: Acceptable Oil Pressure Ranges?

Postby Machster69 » Aug 25 2012, 3:03am

But to answer your other question...

GM SPEC is
6 psi minimum @1000 RPM, 18 psi @2000 RPM, 24 psi @4000 RPM
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Re: Acceptable Oil Pressure Ranges?

Postby gmtech257 » Aug 26 2012, 9:36pm

Had it happen to mine with 400 miles on it.Changed the pump.




Service Information



2012 GMC Truck Sierra - 4WD | Cheyenne, Sierra, Silverado VIN C/K Service Manual | Document ID: 2768732
--------------------------------------------------------------------------------


#PIP4978E: Tick Noise Cold or After 10 To 15 Minutes Of Engine Run Time It May Also Happen After A Coast Down At Operating Temperature **DO NOT REPLACE LIFTERS** - (Feb 6, 2012)







Subject:

Tick Noise Cold or After 10 To 15 Minutes Of Engine Run Time It May Also Happen After A Coast Down At Operating Temperature **DO NOT REPLACE LIFTERS**






Models:

2011 - 2012 Chevrolet Camaro







2011 - 2012 Chevrolet Corvette







2011 - 2012 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, Colorado







2011 - 2012 Cadillac Escalade







2011 - 2012 GMC Savana, Sierra, Yukon, Canyon







2011 - 2012 Cadillac CTS-V







Built with any of the following V8 Engine RPO Codes:







4.8L - L20







5.3L - LC9, LH9, LMG,







6.0L - L96







6.2L - L9H, LSA, LS3, L94, L99, LS9



--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
This PI was superseded to update specs along with Silao built engines. Please discard PIP4978D.
--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:


A dealer may encounter a customer’s concern of a lifter tick type noise that occurs cold at idle or 10 to 15 minutes after a cold start. It may also happen after a coast down at operating temperature (could happen at any time).

Typically the vehicle will have lower mileage; however, we have seen cases as high as 6k mi.

This may be a single lifter or multiple lifters making noise.

The oil pump may be aerating the oil when the engine is hot causing the lifters to make noise.

This would only apply to vehicles built between 4/1/11 and 11/1/11.

Except for vehicles built with Silao built engines. Silao uses a different supplier.

Note: Also includes replacement engines build in this time frame.

Recommendation/Instructions:


Do not replace the lifters for this concern.

Recommend to replace the oil pump for this concern of an engine tick noise.

Use current parts listed in GM parts catalog.

The new pump should be checked before it is installed. New pump may have the concern.

The oil pump can be checked by using a .002" or .050 mm feeler gauge (as shown below). If the feeler gauge will fit between the cover and the pump housing it should be replaced pump.
















Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.





WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2012 General Motors. All rights reserved.
gmtech257
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Re: Acceptable Oil Pressure Ranges?

Postby HighSpeed [OP] » Aug 26 2012, 11:57pm

gmtech257 wrote:Had it happen to mine with 400 miles on it.Changed the pump.




Service Information



2012 GMC Truck Sierra - 4WD | Cheyenne, Sierra, Silverado VIN C/K Service Manual | Document ID: 2768732
--------------------------------------------------------------------------------


#PIP4978E: Tick Noise Cold or After 10 To 15 Minutes Of Engine Run Time It May Also Happen After A Coast Down At Operating Temperature **DO NOT REPLACE LIFTERS** - (Feb 6, 2012)







Subject:

Tick Noise Cold or After 10 To 15 Minutes Of Engine Run Time It May Also Happen After A Coast Down At Operating Temperature **DO NOT REPLACE LIFTERS**






Models:

2011 - 2012 Chevrolet Camaro







2011 - 2012 Chevrolet Corvette







2011 - 2012 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, Colorado







2011 - 2012 Cadillac Escalade







2011 - 2012 GMC Savana, Sierra, Yukon, Canyon







2011 - 2012 Cadillac CTS-V







Built with any of the following V8 Engine RPO Codes:







4.8L - L20







5.3L - LC9, LH9, LMG,







6.0L - L96







6.2L - L9H, LSA, LS3, L94, L99, LS9



--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
This PI was superseded to update specs along with Silao built engines. Please discard PIP4978D.
--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:


A dealer may encounter a customer’s concern of a lifter tick type noise that occurs cold at idle or 10 to 15 minutes after a cold start. It may also happen after a coast down at operating temperature (could happen at any time).

Typically the vehicle will have lower mileage; however, we have seen cases as high as 6k mi.

This may be a single lifter or multiple lifters making noise.

The oil pump may be aerating the oil when the engine is hot causing the lifters to make noise.

This would only apply to vehicles built between 4/1/11 and 11/1/11.

Except for vehicles built with Silao built engines. Silao uses a different supplier.

Note: Also includes replacement engines build in this time frame.

Recommendation/Instructions:


Do not replace the lifters for this concern.

Recommend to replace the oil pump for this concern of an engine tick noise.

Use current parts listed in GM parts catalog.

The new pump should be checked before it is installed. New pump may have the concern.

The oil pump can be checked by using a .002" or .050 mm feeler gauge (as shown below). If the feeler gauge will fit between the cover and the pump housing it should be replaced pump.
















Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.





WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2012 General Motors. All rights reserved.


The dealer said there was a bulletin about this issue but I didn't get to see it. Thanks!!! So, can I assume this remedied the issue?
Original Poster
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HighSpeed
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Re: Acceptable Oil Pressure Ranges?

Postby gmtech257 » Aug 27 2012, 12:23am

Yes,problem solved.Just like stated in the bulletin a .002 feeler guage fit between pump cover and housing.Its the only one we have seen so far a work and it just happened to be on my new truck. :evil:
gmtech257
Automotive Technician
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Registered users

Re: Acceptable Oil Pressure Ranges?

Postby HighSpeed [OP] » Aug 27 2012, 12:28am

Is this purely a nuisance sound or is there a substantial risk of the oil pump failing/engine seizing?
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Re: Acceptable Oil Pressure Ranges?

Postby HighSpeed [OP] » Aug 31 2012, 7:24pm

I took my truck in yesterday to have the oil pump replaced under warranty. So far so good; the noise seems to have been fixed.
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Acceptable Oil Pressure Ranges?

Postby Machster69 » Aug 31 2012, 7:29pm

Thank goodness :) that was a nasty one
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