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Old 05-29-2013, 04:30 PM   #1
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For those who mod....

Just a word of caution to those who are modifying your camaro's...whether it be the LS3, L99 or the LSA....

REPLACE THE OIL PUMP!

Dont assume GM has fixed it....because they havent. My pressure relief valve stuck at 9000 miles, and my motor is trashed.

On the bright side, time for an upgrade .
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Old 05-29-2013, 04:32 PM   #2
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yup Lethal put the Melling in mine at 1500 miles with the Cam and heads.
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Old 05-29-2013, 10:52 PM   #3
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Do What? I have not heard of this.Is this a big problem? I thought I have read just about every post on this site and I did not see anything about an oil pump problem.
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Old 05-29-2013, 10:53 PM   #4
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yup Lethal put the Melling in mine at 1500 miles with the Cam and heads.
got my melling pump in with cam work
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Old 05-29-2013, 11:28 PM   #5
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Is this the Melling 10296 pump?
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Old 05-29-2013, 11:37 PM   #6
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When i was doing a cam swap, Texas Speed said there is no reason to replace. They said it was a great pump.

I have read it has more to do with gunk causing the spring stick.

OP what oil, oil filter, and intervals do you go for?
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Old 05-29-2013, 11:55 PM   #7
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wait the pressure relief valve is in the oil pan if im not mistaken and has nothing to do wth the oil pump? Also this happened to a friend of mine on his brand new ZL1, he trashed two motors before knowing what the problem was.

I Killed a rod bearing on my 427 truck a few days ago as well because oil pressure was fluctuating like anything, which im assuming is due to the pressure relief valve acting up, im blocking the valve and should be good.

What im not sure about is how to verify if its the valve in the oil pan or the valve in the oil pump thats acting up?

So for those looking for a fix, BLOCK THE VALVE.
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Old 05-30-2013, 12:18 AM   #8
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Here's a PI from GM that lists a slew of engines that can have this problem and it states to replace the oil pump.

#PIP4158D: Low Oil Pump Pressure Due To Sticking Oil Pressure Relief Valve- (Jan 18, 2012)
Subject: Low Oil Pump Pressure Due To Sticking Oil Pressure Relief Valve

Models: 2008 - 2009 Buick Lacrosse, Allure (Canada Only)

2007 - 2012 Cadillac CTS-V, Escalade

2007 - 2012 Chevrolet Avalanche, Corvette, Silverado, Suburban, Tahoe

2007 Chevrolet Monte Carlo SS

2007 - 2009 Chevrolet Impala SS, Trail Blazer

2009 - 2012 Chevrolet Colorado

2007 - 2012 GMC Envoy, Sierra, Yukon

2009 - 2012 GMC Canyon

2008 - 2010 Hummer H2

2008 - 2010 H3 Alpha

2008 Pontiac Grand Prix GXP

2008 - 2010 Pontiac G8 GT

2007 - 2009 Saab 97x

With the Following Aluminum V8 Engine RPOs:

L76, L77, L92, L94, L99, L9H, LC9, LH6, LH8, LH9, LS2, LS3, LS4, LS7, LS9, LSA, LZ1



This PI was superseded to update model and model years. Please discard PIP4158C.

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

Condition/Concern:


Some customers may complain of low oil pressure, no oil pressure, and/or engine noise, which may be the result of a sticking oil pump pressure relief valve. In some instances, this may occur intermittently if the valve frees up when the engine cools down.

Recommendation/Instructions:


If SI diagnosis isolates low mechanical oil pressure at the oil filter housing and oil pressure sensor, replace the oil pump, flush the oil cooler lines (if equipped),
Clean the inside of the oil pan, change the oil and filter, and re-evaluate the concern.
Notice: If an engine noise is noticed after replacing the oil pump, follow the SI diagnosis and repair the engine as necessary.
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
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Old 05-30-2013, 12:19 AM   #9
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Quote:
Originally Posted by ayousef View Post
wait the pressure relief valve is in the oil pan if im not mistaken and has nothing to do wth the oil pump? Also this happened to a friend of mine on his brand new ZL1, he trashed two motors before knowing what the problem was.

I Killed a rod bearing on my 427 truck a few days ago as well because oil pressure was fluctuating like anything, which im assuming is due to the pressure relief valve acting up, im blocking the valve and should be good.

What im not sure about is how to verify if its the valve in the oil pan or the valve in the oil pump thats acting up?

So for those looking for a fix, BLOCK THE VALVE.
IT's the valve in the pump. The shop that I'm working with took the pump off and you can see the valve is still stuck. This is the OEM pump by the way. The fix is to install the melling aftermarket pump. I would not recommend replacing it with another OEM pump as a few on camaro5 have had repeat problems even after having the dealer install the new OEM oil pump.
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Old 05-30-2013, 12:21 AM   #10
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Quote:
Originally Posted by KlugSS View Post
When i was doing a cam swap, Texas Speed said there is no reason to replace. They said it was a great pump.

I have read it has more to do with gunk causing the spring stick.

OP what oil, oil filter, and intervals do you go for?
This is essentially a new motor. I barely turned 9000 miles and picked up the car brand new Jan 26th of 2013. There shouldnt be any gunk in the motor.

Was using mobil 1 oil 5w30 / oem filter

Another thing to look at is the melling pump is what...150 bucks? I would much rather have spent the 150 dollars than have to spend the thousands of dollars I have to pay now to fix the motor.
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Old 05-30-2013, 12:40 AM   #11
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Originally Posted by 2ss-booya View Post
IT's the valve in the pump. The shop that I'm working with took the pump off and you can see the valve is still stuck. This is the OEM pump by the way. The fix is to install the melling aftermarket pump. I would not recommend replacing it with another OEM pump as a few on camaro5 have had repeat problems even after having the dealer install the new OEM oil pump.
weird, on my friends car is was the valve in the oil pan, wtf is with all those pressure relief valves? Im glad they blocked my pressure relief valve on my ZL1.

Btw have the shop also look at the valve in the oil pan, its another one thats notorious for getting stuck.

which makes me think, I wonder if the SLP pump I had on my truck is simply a modified factory pump or what exactly...

found this:
http://forum.grrrr8.net/showthread.php?t=33532
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Old 05-30-2013, 02:00 AM   #12
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Sorry to hear about that man. Thanks for posting this though, I had no idea the ZL1's had bad oil pumps.
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Old 05-30-2013, 02:24 AM   #13
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This is the kind of stuff that just pisses me off.....and just about destroys my faith in a product I have been fiercely loyal to over the years (GM)....I manage our company fleet in addition to buying my personal vehicles and have bought many dozens of Chevrolets...

I dropped a bunch of $ modding my ZL1.....and, thanks to the good people on this Forum, now discover a potential deadly issue on a car I have $75K+ invested in....and no factory recall on the part.....I have to discover it for myself on an Internet message board.....UFB....and, IMO, a disgrace to GM for their could care less attitude toward their customers....

Makes me wonder just what kind of pre-release "testing" their engineering staff did on this model....seems the issue should have cropped up before now? Sad.....
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Old 05-30-2013, 07:52 AM   #14
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Originally Posted by 2ss-booya View Post
This is essentially a new motor. I barely turned 9000 miles and picked up the car brand new Jan 26th of 2013. There shouldnt be any gunk in the motor.

Was using mobil 1 oil 5w30 / oem filter

Another thing to look at is the melling pump is what...150 bucks? I would much rather have spent the 150 dollars than have to spend the thousands of dollars I have to pay now to fix the motor.
Why would you have to pay to fix your motor? Is it not still under warranty from GM? I guess if you have done some mods to your motor I would see why they would not but your dealer still might work with you if this is a problem with others also.
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Old 05-30-2013, 09:05 AM   #15
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Why would you have to pay to fix your motor? Is it not still under warranty from GM? I guess if you have done some mods to your motor I would see why they would not but your dealer still might work with you if this is a problem with others also.
Negative. dealer needs gm approval to do warranty work and the first thing gm would ask for is calibration info from the ecu. My car is tuned so that's a no go.
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Old 05-30-2013, 09:21 AM   #16
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Negative. dealer needs gm approval to do warranty work and the first thing gm would ask for is calibration info from the ecu. My car is tuned so that's a no go.
I would still try. a tune did not cause that valve to stick. that is a mechanical component completely unrelated to anything in the ECM.

there is no planet on which you can say what happned in the ECM cause that oil pump vavle to stick. that is just a failure mode based on the design of that component.

Have you talked to a GM rep about it???? this is not something that dealrship "has" to take care of. when I bough my 08 corvette I had a 2nd gear syncro go out and they wanted to repair but I got the rep to supply a new tranny.
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Old 05-30-2013, 09:28 AM   #17
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I would still try. a tune did not cause that valve to stick. that is a mechanical component completely unrelated to anything in the ECM.

there is no planet on which you can say what happned in the ECM cause that oil pump vavle to stick. that is just a failure mode based on the design of that component.

Have you talked to a GM rep about it???? this is not something that dealrship "has" to take care of. when I bough my 08 corvette I had a 2nd gear syncro go out and they wanted to repair but I got the rep to supply a new tranny.
Already did. On top of that there isnt a tsb, it's a PI, which lessens the leverage I have over the problem. Simply put if my car wasnt modded this wouldnt be a problem.

As soon as gm would see my ecu info, they'll immediately blame it on uncertified calibrations and equipment as the cause of failure and I would have to rack up legal fees to pursue. If i was successful, which is unlikely, all GM would do is repair the engine and replace the oil pump with another faulty oem pump.

So basically, lesson learned. Gotta pay to play, and I always learn the hard way lol.
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Old 05-30-2013, 09:38 AM   #18
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Already did. On top of that there isnt a tsb, it's a PI, which lessens the leverage I have over the problem. Simply put if my car wasnt modded this wouldnt be a problem.

As soon as gm would see my ecu info, they'll immediately blame it on uncertified calibrations and equipment as the cause of failure and I would have to rack up legal fees to pursue. If i was successful, which is unlikely, all GM would do is repair the engine and replace the oil pump with another faulty oem pump.

So basically, lesson learned. Gotta pay to play, and I always learn the hard way lol.
I am just saying from a mechanical engineering standpoint that argument is not valid so they can say it all day long. I can say the sky is green doesn't make it green.

A tune did not cause this fauilure and can physically be proven. Same thing happened where I guy got his intercooler pump fixed on a modded car. GM determined the mod did not contribute to the failure.
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Old 05-30-2013, 09:41 AM   #19
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I am just saying from a mechanical engineering standpoint that argument is not valid so they can say it all day long. I can say the sky is green doesn't make it green.

A tune did not cause this fauilure and can physically be proven. Same thing happened where I guy got his intercooler pump fixed on a modded car. GM determined the mod did not contribute to the failure.
This is true. I remember seeing that post.
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Old 05-30-2013, 09:46 AM   #20
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I am just saying from a mechanical engineering standpoint that argument is not valid so they can say it all day long. I can say the sky is green doesn't make it green.

A tune did not cause this fauilure and can physically be proven. Same thing happened where I guy got his intercooler pump fixed on a modded car. GM determined the mod did not contribute to the failure.
I know what you're saying...I definitely agree with you 100%. The problem is I'm on the sh&t end of the problem where I will likely have to use legal means to get it fixed, which to be honest, I just dont want to deal with that. Another thing is that I have a cam installed, which means GM can pull just about any card they want to shift blame on why the valve stuck. We're not dealing with a CAI and exhaust. I was pushing >13 psi, rev limit to 7000rpm also and 700hp at the wheels. To me that reeks of a big uphill battle.

I didn't start the thread to bash GM, even though they are the ones that continue to install oil pumps with faulty relief valves. All I was trying to do is warn people who are modifying their v8's to opt for the cheap insurance of replacing the oil pump. Everyone says "oh why fix it if it isn't broken?", well tell me that again once the valve sticks and your bearings are shot and thinking "sh&t i should've replaced it"
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Old 05-30-2013, 09:51 AM   #21
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May as well go all the way and do a cam, heads, timing chain, and, ls2 timing chain dampner. Your gonna be in there anyway, so you will save a ton on labor. trying to look on the bright side.
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Old 05-30-2013, 09:52 AM   #22
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May as well go all the way and do a cam, heads, timing chain, and, ls2 timing chain dampner. Your gonna be in there anyway, so you will save a ton on labor. trying to look on the bright side.
already there. I have the cam....looking at doing an lsx 376 b15
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Old 05-30-2013, 09:55 AM   #23
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already there. I have the cam....looking at doing an lsx 376 b15
nice
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Old 05-30-2013, 11:21 AM   #24
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Ok can you give me the melling oil pump # and where can I get one please haven't done any mods yet but I am fixing to so this is a definate upgrade and is this the only thing that needs to be replaced.
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