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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 09-21-2011, 10:48 AM   #1
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High volume oil pump.

I have heard arguments both ways, so lets get a consensus. Having a cam done next week. Most builders have to ld me that our stock oil pump is great and more than adequate for a cam job. A few builders highly recommend a high volume oil pump. Is it worth replacing the oil pump? Just trying to keep the cost a little lower, if its not necessary. Thanks guys
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Old 09-21-2011, 10:58 AM   #2
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I was curious as well, through my research it seems the general consensus here is to go after market... I think Marylandspeed had a failure on their stock pump??
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Old 09-21-2011, 11:05 AM   #3
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I've also heard that it's wise to at least upgrade the existing pump or replace with an aftermarket one. There's possible issues with some of the stock pumps that fail.
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Old 09-21-2011, 11:05 AM   #4
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do your installers know there's a service bulletin out on the stock pump and there's been some issues with it failing?
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Old 09-21-2011, 11:14 AM   #5
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There won't be consensus on it.

At the very least I'd look at it and check its operation and debur it if you see casting imperfections. But if you're paying for labor that route may be no cheaper than buying one where its already been done. I don't think a high volume pump is necessary and the melling pump comes with a stock pressure spring. If you do sustained high rpm driving like on a road course some ppl have noted low oil pressure because the high volume emptied the pan. So you're just trading one risk for another.
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Old 09-21-2011, 11:28 AM   #6
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I reused my stock timing chain and oil pump when I did my cam swap. Whos to say the aftermarket one wont fail too.
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Old 09-21-2011, 11:30 AM   #7
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there is a tsb with the ls3 oil pumps

i'd change it in a heartbeat.

we believe this is partially the cause of my last engine grenading.
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Old 09-21-2011, 12:13 PM   #8
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I changed it out. It's $140 peice of mind.....
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Old 09-21-2011, 12:15 PM   #9
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I would also change the pump.

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Old 09-21-2011, 12:39 PM   #10
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never had a problem here with the factory pumps if you shim the pressure spring
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Old 09-21-2011, 12:47 PM   #11
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Quote:
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never had a problem here with the factory pumps if you shim the pressure spring
Caveating your response with "if you do this" lends itself to changing the pump.

FWIW, I'm having mine replaced when the cam swap occurs this week.
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Old 09-21-2011, 04:59 PM   #12
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I have heard that the stock pumps have had issues. I upgraded to a ported oil pump from TSP. IMO its cheap insurance, your spending all that money whats another 150 bucks. My oil pressure seems to be more responisve with it and the pressure is higher.
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Old 09-21-2011, 05:13 PM   #13
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A ported pump is no different than a stocker... If you want to move more oil you get a melling hi volume pump... only one we use in our builds
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Old 02-07-2012, 09:48 PM   #14
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Someone tell my why it is better to move more volume as far as the enginer oil goes? Why is this better?
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Old 02-08-2012, 11:17 PM   #15
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I didn't change it when doing a cam swap...stock oil pump failed...and I immediately regretted it. Went with Melling 10296 and never looked back...lesson learned...
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Old 02-09-2012, 12:24 AM   #16
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Went with Melling 10296 and never looked back...
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Old 02-09-2012, 01:01 AM   #17
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My stock oil pump trashed my motor. The check valve jammed shut, starved the engine for oil, and ruined several lifers, the lifter bores, and the cam. There is a TSB out for this..so GM knows there is a problem. If you are doing a cam, you might as well put a melling in to eliminate the chance of it happening. It is certainly a lot cheaper than a new short block.

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Old 02-09-2012, 01:18 AM   #18
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I guess this should help answer some recent questions.

Sorry to here it.
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