lt1 oil pump

**6801** · 01-23-2010, 06:00 PM

im doing le 2 build and droping motor and trans while cleaning things up cold oil pressure is 40 psi and about 20 warmed up all day should i put a melling hp hv pump in or std volume hp or leave it alone im not trying to go to crazy because afer 2010 im gonna 396 supercharge build

**5.0THIS** · 01-24-2010, 12:49 AM

Just put in a stock replacement pump then and you should be fine.

**JaycenK** · 01-24-2010, 09:38 AM

+1

**97bluebird** · 01-24-2010, 06:28 PM

DO NOT get a HV pump. The short block that I bought for my car had a HV pump in it and I didn't even think about it. I put my stock pan on it and dropped it in. Big mistake. to make a long story short, it sucked the pan dry and filled the heads full of oil, tore up the crank. I just got the motor back in this past week.

**6801** · 02-07-2010, 07:30 AM

so what mellin pump number stock volume high pressure with screen

**6801** · 02-07-2010, 10:59 AM

i was told to use m155 melling stock replacement 33$ i was looking for stock volume high pressure i will call gm dealer and see there prices arnt lt1 and sbc the same pump just diffrent pickups

**JaycenK** · 02-07-2010, 08:00 PM

M55 stock pressure stock volume. M155 stock pressure stock volume. You do not need a high pressure pump to blow out of seals. The m155 came in my stroker kit. I ended up having to buy an m55 to work with a moroso oil pan and moroso pickup. The m155 uses a 3/4 pickup tube inlet and the m55 uses a 5/8 pickup tube inlet I think the stock pickup tube is a 3/4 so you could go with the m155. If you decide to go with another pickup and need a 5/8 inlet on the pump, use the m55

**mitchntx** · 02-09-2010, 09:56 AM

There are a couple versions of the Melling pump. I believe a Melling Select has a more robust hosing.

Always braize the pickup tube to the pump.

**5.0THIS** · 02-09-2010, 12:26 PM

Originally Posted by mitchntx

There are a couple versions of the Melling pump. I believe a Melling Select has a more robust hosing.

Always braize the pickup tube to the pump.

Agreed, bolt or not.

**JaycenK** · 02-09-2010, 01:41 PM

Originally Posted by 5.0THIS

Agreed, bolt or not.

Why if it has a bolt? Is it Because of possible air syphen?

**5.0THIS** · 02-09-2010, 11:18 PM

Originally Posted by JaycenK

Why if it has a bolt? Is it Because of possible air syphen?

Many years ago in one of our racing engines we had one of those bolt tabs break, or come loose. I forget which. When you lose a pickup, bad things happen. Braizing the pickup on is quick, easy, and good insurance.