LS1 Oil pump ..
Thread Starter
TECH Senior Member
iTrader: (1)
Joined: Jan 2003
Posts: 9,343
Likes: 0
From: Armpit of East TX
LS1 Oil pump .. I bought a used LS1 short block during the tear down I was going to look at the oil pump to make sure it doesn't have any trash in it. I thought I may as well do some porting work on it if it isn't to difficult to do or much room for error.
Anyways ... I got a few questions on it now. On the right side, looking at the front, there is a big allen head screw like thing, with a spring and plunger behind it. Any ideas what this does?
What should I do as far as porting it? Are there any hints I need to get this thing back together. The outside ring looks like it has a dot on it, but I didn't see one on the inside ring, is there a special way to line it up?
Anyways ... I got a few questions on it now. On the right side, looking at the front, there is a big allen head screw like thing, with a spring and plunger behind it. Any ideas what this does?
What should I do as far as porting it? Are there any hints I need to get this thing back together. The outside ring looks like it has a dot on it, but I didn't see one on the inside ring, is there a special way to line it up?
That would be the pressure relief valve you see. When the pressure goes too high, it opens and the excess oil pressure is bypassed. Theres no alignment on the inside gears.
All the proting you can do it just where the oil enters and where it leaves. Clean up the passages so they are smooth.
All the proting you can do it just where the oil enters and where it leaves. Clean up the passages so they are smooth.
Originally Posted by Flyer
I bought a used LS1 short block during the tear down I was going to look at the oil pump to make sure it doesn't have any trash in it. I thought I may as well do some porting work on it if it isn't to difficult to do or much room for error.
Anyways ... I got a few questions on it now. On the right side, looking at the front, there is a big allen head screw like thing, with a spring and plunger behind it. Any ideas what this does?
What should I do as far as porting it? Are there any hints I need to get this thing back together. The outside ring looks like it has a dot on it, but I didn't see one on the inside ring, is there a special way to line it up?
Anyways ... I got a few questions on it now. On the right side, looking at the front, there is a big allen head screw like thing, with a spring and plunger behind it. Any ideas what this does?
What should I do as far as porting it? Are there any hints I need to get this thing back together. The outside ring looks like it has a dot on it, but I didn't see one on the inside ring, is there a special way to line it up?
TECH Resident
Joined: Jan 2002
Posts: 828
Likes: 0
From: dallas,tx.
10-4 on what P Mack says regarding porting and such. but I always use STP or GM Assembly lube when putting engines back together. as an added touch, I wait and make sure my temp gauge works, then drain the oil and strain it to check for any trash like rocks, bearings, or other chunks of metal. just my $.02.
Thread Starter
TECH Senior Member
iTrader: (1)
Joined: Jan 2003
Posts: 9,343
Likes: 0
From: Armpit of East TX
Should I do somehting about the pressure relief valve to keep it from relieving as much pressure? Wouldn't tha tbe a bad thing if that's what I was doing?
Originally Posted by Flyer
Should I do somehting about the pressure relief valve to keep it from relieving as much pressure? Wouldn't tha tbe a bad thing if that's what I was doing?
Trending Topics
Thread Starter
TECH Senior Member
iTrader: (1)
Joined: Jan 2003
Posts: 9,343
Likes: 0
From: Armpit of East TX
Broke a bolt using 150 ft-lbs, I think I'm gonna try 120 once I get the bolt out and find another one. Anyone have a doner bolt?
Are there any gaskets to use for the pump or for the pump to the block? I don't remember pulling any off, but I thought that seemed a little strange.
Are there any gaskets to use for the pump or for the pump to the block? I don't remember pulling any off, but I thought that seemed a little strange.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Originally Posted by Flyer
Broke a bolt using 150 ft-lbs, I think I'm gonna try 120 once I get the bolt out and find another one. Anyone have a doner bolt?
Are there any gaskets to use for the pump or for the pump to the block? I don't remember pulling any off, but I thought that seemed a little strange.
Are there any gaskets to use for the pump or for the pump to the block? I don't remember pulling any off, but I thought that seemed a little strange.
Tell me you didnt try ft-lbs?
Ill look it up. Its INCH pounds, not foot pounds. 
I can shift faster than you.
iTrader: (21)
Joined: Nov 2001
Posts: 5,133
Likes: 0
From: Baton Rouge, LA
Originally Posted by guadofreak
I can replace my 00 ls1 oil pump with an 02 LS6 oil pump with out any modding right?
And yes, those bolts are always tough to remove. They have some sort of thread sealer on them from the factory.
Jason
Teching In
Joined: Mar 2004
Posts: 37
Likes: 0
I have an 99 and replaced my pump for a ls6 pump. I took the cover off of both units and I can see no difference at all. I would not waste time doing a home port. It crossed my mind, but there is not much alloy to port.
Thread Starter
TECH Senior Member
iTrader: (1)
Joined: Jan 2003
Posts: 9,343
Likes: 0
From: Armpit of East TX
Originally Posted by benningtonz28
I have an 99 and replaced my pump for a ls6 pump. I took the cover off of both units and I can see no difference at all. I would not waste time doing a home port. It crossed my mind, but there is not much alloy to port.
