should i replace my oil pump while doing the cam
02-03-2015, 07:52 PM
#1
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should i replace my oil pump while doing the cam hey guys/ladies my GXP is currently in the shop getting a cam installed was wondering if it was a good idea to go ahead and replace the oil pump since the motor will be opened anyway and if so whats a good oil pump? i see alot of people use the melling brand
02-04-2015, 05:29 AM
#6
If you search in the ls6 section you will see the ls6 guys going nuts for the ls4 pumps and the ls4 guys looking for the ls6 pumps. The ls4 pump is both pressure and volume increased, some say that the extra volume is a problem with a non DoD/AFM engine. This is a concern with an actual engine built as a non DoD/AFM capable block but an engine block designed for Dod/AFM from the factory it has been designed to handle the extra volume. So no top end loading. Again if you search for oil pump failures ther are only 2 to be found for the ls4 and 1 of those is questionable as the oil pan installation procedures were not followed (they are very specific) and if looking at the ls6 pump failures there are plenty.
02-04-2015, 07:50 AM
#7
Disagree to the max, after doing a ls4 oilpan plenty of times now there's nothing spec picky about installation, it's pretty idiot proof. People jack up ls6 pumps or the that fact any oil pump because there not taking the time to use a feeler gauge when they do the install. LS4 is a high volume, most guys that are fi want our pump for that reason. Ls6 takes less power and produces more pressure which is gold for a n/a applications in general .
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02-04-2015, 08:54 AM
#8
Disagree to the max,Allow me to help you understand after doing a ls4 oilpan plenty of times now there's nothing spec picky about installation,Actually if you look at the oil galleys as lets say a full moon and you install the pan improperly you can make the galley look like a 2/3rds moon... otherwise restricting the passage by 1/3. GM specifies that the rear of the pan must be flush with the back of the block period for this reason and also specifies a specific torque pattern to be followed and it is not crisscross as one would think, nor are all the bolts the same torque. it's pretty idiot proof. People jack up ls6 pumps or the that fact any oil pump because there not taking the time to use a feeler gauge when they do the install.Here is a different story most of the ls6 pumps that fail are stock factory installs LS4 is a high volume, most guys that are fi want our pump for that reason. Ls6 takes less power and produces more pressure Here is another tidbit the ls4 block has built into it pressure relief valves, 2 in 05/06 and even if you put a higher pressure pump in it will never go beyond the factory pressure relief point without first modifying these check valves which is gold for a n/a applications in general .
02-04-2015, 01:04 PM
#9
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what u guy think about this pump melling 10355, or go with the melling 10296 lol dont wanna go wrong.
http://www.coloradospeed.com/melling...l-p-10904.html
http://www.coloradospeed.com/melling...l-p-10904.html
02-04-2015, 01:40 PM
#10
If that is the route you wanna take go for the 10355 as it states it is for the Ls4.
go here for more info and/or give them a call:
http://www.mellingselectperformance....inum-Oil-Pumps
go here for more info and/or give them a call:
http://www.mellingselectperformance....inum-Oil-Pumps
02-04-2015, 01:46 PM
#11
Yep. My buddy that works at a shop with a fleet over 100+ GM trucks. Many are 6.0 with the DOD and he has the same problem. Several have had to go to the dealer under warranty for work. Almost all reinstalled the pan wrong and he had to redo it when it came back. He gripes about it being done wrong all the time. I honestly was not aware until I stopped by one day and he had one in the air and explained what he was doing.
02-04-2015, 09:16 PM
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