gmcyukon

iTrader: (9)

Just rebuilt my 5.3 and I'm going. Buying me an oil pump just need some input on an ls6 or just the standard oil pump. This is a 2002 motor also I put a high lift hot cam in and CAI . And planning on doing more bolt ons later

egod

iTrader: (1)

Do you have really high HP plans for the motor? If not, the stocker will do just fine, maybe a little porting and a stiffer spring would be a great upgrade. Don't fix what isn't broken, unless you've found a really nice deal.

Darkman

iTrader: (2)

Look at the Melling 10296.

JakeFusion

iTrader: (7)

Or the Synergy High Flow pump.

It's based on the latest GM HV pumps that flow on par with the Melling 10296, but it'll actually fit a double-roller and has been ported/had flashing cleaned up. Rick is a good guy to chat with about that pump. He runs them on stockers and built engines.

transwiz

iTrader: (26)

If you are going to be in the motor anyway,Replace the oil pump with a melling 295 or
296.

gmcyukon

iTrader: (9)

I dont have high HP plans. The motor I rebuilt had a over 100k on it and the oil pump was just fine I had great pressure even at idle. Someone on tech has a ls6 pump with less than 10k for $50. And I'm very interested

egod

iTrader: (1)

If it ain't broke don't fix it. The stock unit is very strong performer, even for high HP applications.

KCS

iTrader: (20)

Aren't the '01 up oil pumps the same as an LS6 anyways?

MonmouthCtyLS7

iTrader: (6)

Run a New Era ported stocker here for a year no problems

egod

iTrader: (1)

I've read quite a few books on the subject I don't ever recall them mentioning any considerable difference between the years/models of the pump. All I know is they are capable of handling just about anything with a few small upgrades. If it worked fine stock before the rebuild then it will be fine after. Save the $50 for something else like putting it toward coated bearing or upgrading your hardware.

96capricemgr

iTrader: (1)

this is what I was going to say

JakeFusion

iTrader: (7)

LS4, L99, and LS3 are all different.

LS3 I believe is the conventional LS6, LS4 was a high flow pump with a 52lbs bypass spring. L99 is high flow with a 42lbs bypass spring. All three have different PNs.

96capricemgr

iTrader: (1)

Those are all gen IV motors right?

egod

iTrader: (1)

yes they are all GEN IV

KCS

iTrader: (20)

He is rebuilding a 2002 5.3L, as stated in the first post. The point then is that he already has an LS6 pump.

JakeFusion

iTrader: (7)

Yeah. But GM doesn't make Gen III anymore, so meh. The LS6 pump was carried over.

96capricemgr

iTrader: (1)

From what I see a lot of the early LS1 weaknesses are blindly applied to the later engines like the oilpump thing or rod bolts.

Those motors are a minority of what folks are playing with given the number of 5.3 and 6.0l stuff that has been made since.

smws6ta

iTrader: (5)

I have a 04' LQ4 short block. Would it already have a LS6 oil pump? Or did the vortech motors come with different pumps.

egod

iTrader: (1)

All Gen III had the same size gear diameter and thickness, I would assume that they were all the same. I believe the Gen IV differed only for AFM and dry sump needs.

onefast84

I would replace it with a new gm ls6 pump. They are only around $100. I just changed my lq4 pump to a ls6. I compared the pumps, and the ls6 pump gear is almost twice as thick. I would think that you have the same pump as I do as my engine is a 2002 also.