Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

LM7 Water Pump Only ?

Thread Tools
 
Search this Thread
 
Old Mar 29, 2019 | 08:43 AM
  #1  
RacerX10's Avatar
Thread Starter
Teching In
 
Joined: Nov 2018
Posts: 38
Likes: 0
Default LM7 Water Pump Only ?

I'm putting together a salvage yard motor to do some circle track racing. My fuel pump and power steering are mounting on the rear bellhousing, so the only thing I need on the front of the engine is a water pump.

Carb setup if that matters.

What's the cheapest / easiest way to run an water pump only setup on an LS engine ?


Thanks !
Reply
Old Mar 29, 2019 | 10:56 AM
  #2  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

Mount an idler pulley and spacer in one of the bolt holes on the drivers side of the motor or head. route the belt over that then under the WP pulley like the camaro, corvette, etc.
Reply
Old Mar 29, 2019 | 11:51 AM
  #3  
RacerX10's Avatar
Thread Starter
Teching In
 
Joined: Nov 2018
Posts: 38
Likes: 0
Default

Did some googling after your description and found this .. is it about what you mean ? Looks like this one is on the passenger side though ...

Reply
Old Mar 29, 2019 | 12:00 PM
  #4  
G Atsma's Avatar
TECH Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
Default

I think he means use the present tensioner on the passenger side, then put an idler (basically a small pulley on a bearing) on the driver's side. That way the belt has more wrap around the water pump. It would look like a fat "V" with the belt looping up BOTH side of the water pump, a tensioner on one side, idler on the other.
Reply
Old Mar 29, 2019 | 12:27 PM
  #5  
RacerX10's Avatar
Thread Starter
Teching In
 
Joined: Nov 2018
Posts: 38
Likes: 0
Default

Seems like a lot of belt flyin' around for such a simple need

I wonder if i could make a water pump with a bolt on hub work to just belt around the WP and the crank pulley :

Reply
Old Mar 29, 2019 | 12:29 PM
  #6  
G Atsma's Avatar
TECH Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
Default

How will you adjust tension?
Reply
Old Mar 29, 2019 | 12:35 PM
  #7  
RacerX10's Avatar
Thread Starter
Teching In
 
Joined: Nov 2018
Posts: 38
Likes: 0
Default

Originally Posted by G Atsma
How will you adjust tension?
I don't have a tensioner on my current setup (sb 350 type config), it just works. I don't think that the WP has enough load on it to cause the belt to ever slip. It's actually got two "V" belts next to each other.

Looks just like this :


Reply
Old Mar 29, 2019 | 01:29 PM
  #8  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

The pump needs to run in he opposite direction on LS motors.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Mar 29, 2019 | 09:01 PM
  #9  
RacerX10's Avatar
Thread Starter
Teching In
 
Joined: Nov 2018
Posts: 38
Likes: 0
Default

Originally Posted by garys 68
The pump needs to run in he opposite direction on LS motors.
Didn't know that, but does it matter to anything I'm doing ( hope that doesn't sound smartass .. honest question )? What considerations will I need to make for that ?

Surely I can continue to use the existing radiator from my existing SBC setup ?

Thanks for your comments !
Reply
Old Mar 30, 2019 | 04:06 AM
  #10  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

No issues with the radiator, except you'll need an adapter for the different neck sizes on the pump and radiator. You'll also need to T in a steam line somewhere from the heads.
Just buy an LS1 tensioner pulley, a long bolt, and cut a spacer. Mount it on the drivers side somewhere. Keep your existing tensioner. Route a new belt under the crank, over the new idler, under the water pump, over the tensioner. You're done.
Reply




All times are GMT -5. The time now is 11:43 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE