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Old 10-08-2012, 09:04 PM   #15
litle88
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Originally Posted by csjcsj View Post
Look at me! 2010SS early build, stock pump seized, shredded the motor in a matter of seconds! In the works to be rebuilt, well it's rebuilt just waiting on the install! Price, $9500!!!!! All new internals, forged of course! But I didn't listen to my shop and said the stock pump will be fine! Getting the melling pump this time!

But really I believe the problem was with the early 2010's! I would go with the Katec timing chain also!
Sorry to hear that bud! Glad it's up to your specs this time!
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Old 10-08-2012, 09:23 PM   #16
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Ted Jannetty told me to stick with the stock pump. His philosophy was that if it isn't broken, why fix it?
+1

Ted told me it was unnecessary to replace the oil pump and timing chain unless the car has 60k miles.
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Old 10-08-2012, 10:09 PM   #17
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Just did a cam install and I went with a Melling.
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Old 10-08-2012, 10:12 PM   #18
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Lol! Wow if you really want it just buy it.

But don't ask a question if you know what answer you WANT.

the failures are typically because debris gets lodged in the bypass cylinder. The Melling or SLP pump have identical reliefs. They are just as prone to the same fate but they just don't have even 5% of their units in the field compared to GM for anyone to observe fail in this odd way.

The GM oil pump is fine for your requirements honestly. When it comes to oil pressure "more is better" doesn't necessarily apply.
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Old 10-09-2012, 12:41 AM   #19
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Go with the melling. Excellent pump and with it all torn down for the cam now is the time to do it.

Seriously DO IT. My camaro is sitting in my garage right now. The oil pump went out last Monday.:(

To think when I did my cam swap I had the stock oil pump in my hands, and thought maybe I should change this since it is right here. :face palm:

It is only $130 at most for the upgraded oil pump. I would take that over a $1200 dollar bill for a new oil pump install at a dealership.
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Old 10-09-2012, 07:47 PM   #20
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Melling Oil Pump & C5R timing chain every camshaft build...

Better to put the parts in while you are already in there not doing the labor.

Oil pump failures have plagued some of the V8 LS3's

http://www.camaro5.com/forums/showth...=oil+pump+fail

http://www.camaro5.com/forums/showth...=oil+pump+fail

http://www.camaro5.com/forums/showth...=oil+pump+fail

----

Not saying that this is the normal , because obviously there are a TON more good ones out there than bad.. But why take a chance when you are already tearing into the motor? Also remember, if you are doing the cam install bye-bye factory warranty now it's on you IF that oil pump fails.

Just my two cents, been doing this for way too long to not do the proper preventative maintenance and recommend to my knowledge the best for my client.
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Old 10-09-2012, 10:58 PM   #21
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Don't have a Melling pump in mine--still have the stock cam, but will put one in down the road. I had a Melling cam in my 68 327 Camaro, and that cam was sweet. Still remember the specs: .454" lift 284* duration. Lopey but very streetable. If a company like Melling is still in business almost 50 years later they must be doing something right.
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Old 10-09-2012, 11:08 PM   #22
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Originally Posted by Dallascam View Post
I just recently had Cam install done by a performance shop that does a lot of this kind of mod. I asked him several times about changing the oil pump, and He told me that the stock oil pump was as good or better than anything out there. I stayed with stock, and have had no problems.
I was told the same thing by ADM but I have a L99 which is suppose to have a better pump than the LS3. Not sure what he would have recommended for the LS3.
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Old 10-10-2012, 07:18 AM   #23
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A buddy of mine has owned/operated a repair shop for over 20 years, he is also an AC Delco dealer. I cannot tell you the number of LS engine oil pump failures he's seen and repaired. Relief piston stuck in them all. The aluminum bore the relief piston rides in is poorly finished to start with and galls over time causing the piston to stick. We've dissected many failed pumps and they all show the same issue. The Melling is the same design oil pump as OEM ( gerotor ) however it's housing is cast iron versus the OEM pump which is aluminum. The Melling relief bore is better finished and I believe the cast iron housing is more stable greatly reducing if not eliminating this type of failure. To go through all the time, expense and labor for a cam change and not install a Melling oil pump, better timing chain and the LS2 damper is foolish. When you take into account higher seat and open pressures of double valve springs, radical cam profiles with high rates of opening and closing, any upgrades you can make in the LS valve train will pay dividends in longevity AND the oil pump swap is just common sense knowing the history of OEM LS oil pumps.
Ed M.
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Old 10-10-2012, 07:25 AM   #24
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If your swapping the chain out then by all means put the Melling on it since the pump has to come off anyway.
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Old 10-10-2012, 08:27 AM   #25
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I have been building engines for over 33 years, and you have to take in to consideration Statistics.

How many GM LS Pumps are on the road and How Many Melling Oil Pumps are on the road on LS engnines.

Of coarse if there are 100,000,000 GM LS pumps on the road there will be a percentage of failures even if it is 1/10 of 1 percent.

You have to also Ask, What Makes a Melling Pump any better than a GM pump?

Because someone said so on the internet, if it's on the internet it has to be true

I think a lot of the Oil pump failures can be traced back to Installation Errors.

Someone changes a chain, this requires unbolting the oil pump and re installing it, Seems easy enough bolts right back in Place RIGHT? WRONG!!!!!!!!

Many do not know the pump must be Adjusted for clearance during the install.

This requires removing the cover and running a feeler gauge around the pump rotor, you must have the same clearance all the way around the rotor.

If this is Not done you can bet dollars to donuts the pump will fail, Melling or not.

Oil pump failures can also be traced back to other causes like wrong Oil, over heating, running low on oil, over revving when cold just to name a few.

The pump on the engine has a track record the pump in the box does not.

I am not saying don't do it but I am saying your rolling the dice Either Way.

Ted.
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Old 10-10-2012, 08:32 AM   #26
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Well said Ted!
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Old 10-10-2012, 09:08 AM   #27
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I've installed lots of mellings along with people I associate with. Nobody I know has had a melling fail in an LsX motor. I think I'll put my chips on the melling and upgrade it. Ill just be here reading about the stock oil pump failures for my amusement.
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Old 10-10-2012, 09:19 AM   #28
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I've installed lots of mellings along with people I associate with. Nobody I know has had a melling fail in an LsX motor. I think I'll put my chips on the melling and upgrade it. Ill just be here reading about the stock oil pump failures for my amusement.
Tell Me what makes the Melling an Upgrade?
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