TXjeepTJ

iTrader: (8)

the ls1 water pump has a HUGE pulley on it that extends outward. Since many people do conversions, it seems like this would be an item that they would have on the market- a shorter pulley

im not able to have my electric fan in the center of my radiator because the water pump's pulley extends soo far out that it would hit the fan's motor


anyone know of a water pump pulley you can get that replaces the stock 'bell' like pulley?

lt4malibu

iTrader: (39)

the ls2 water pump pulley is considerably shorter

Project GatTagO

iTrader: (7)

You can kinda see how short the LS2/LS3 pump pulley is:



Andrew

HSV-GTS-300

FbodyLS1 and GTO LS1&LS2 used this type



LS2 Corvette Waterpump is interchangeable (provided your belt does not slip off the front of the pulley).

89018052
Water Pump
• For LS2, LS3 and LS7 Corvette engines only


12610311
Water Pump Gasket (not shown)
• Requires 2 per engine
• For LS1, LS2, LS3, LS6, LS7 and L92 engines

TXjeepTJ

iTrader: (8)

soo can i use the ls2 corvette water pump on my ls1? you got me confused with the --"89018052
Water Pump
• For LS2, LS3 and LS7 Corvette engines only" part

HSV-GTS-300

Yes you can, the only difference is in the shaft length and pulley width.
(provided your belt does not slip off the front of the pulley)


[They say for Corvette only....because the pulley is so thin, Corvette belts run about 3/4" in closer to the block than F-body or GTO]
Corvettes have different crank pulley,accessory brackets and tensioners etc because of this different belt offset.

HSV-GTS-300

If you are using an Fbody or GTO Crank pulley/Harmonic Balancer and Fbody or GTO front accesories then both belts run about 3/4" further away from the engine block than a similar setup using all Corvette items.

So if you put a Corvette water pump into the above Fbody or GTO system the danger is the main belt will be running too close to the front edge of the Corvette water pump pulley.

What some people have been known to do when faced with this problem is carefully use a puller to slide the Corvette water pump pulley outward along the shaft about 3/8" and then tack weld it back to the shaft. Of course nobody would guarantee or recommend you did this.

TXjeepTJ

iTrader: (8)

ohhhhh ok thanks alot man! good info

LS1GMCTruck

iTrader: (2)

Isn't the LS7 waterpump a newer internal design & impeller, that has better volume capacity as well? Is this the part # for this newer improved pump? Thanks

philntx

iTrader: (8)

These work great. I used one on my LQ9 block, with Corvette accessories.

TXjeepTJ

iTrader: (8)

have any problem with the belt sliding off? or is the LQ9 different from the ls1 (im not up to date with LQ engines)

rojs234

iTrader: (5)

Don't know if it would be what you are looking for, but Wegner Motorsports,920-394-3557, will cut spacers for you to space your later waterpump out to match in whatever thickness you want. You will also have to use a little common sense and space your tensioner pulley to line up your belt and lower pulley. I had the problem you have of no room for electric fan on my '34 coupe, plus I had to build accessory drive for air and alt. Wegner made mine 1/2" thick and I used the paper type gaskets I got from a local waterpump rebuilder. You also might have a rebuilder in your area who will work with you. The one close to me has helped me on various projects by moving pulleys or shortning pumps or changing shafts, etc. Moving the pulley forward 3/8" inch should be a no-brainer for a waterpump rebuilder. Ron

Oscar Will

I'm one of those guys to pull the LS2 pulley forward and tack weld it. Going over 14,000 miles and quite a few 1/4 passes with no problem.

LSfan70s

Good info! Subscribing.

Pop N Wood

iTrader: (1)

The corvette accessories do run the belt closer to the block than the F bodies, and truck motors run everything farther out than that.

To run the vette water pump why couldn't you switch to all vette accessories and the vette crank pulley? I know it works to install F body accessories to a vette motor.

Steve VanS

iTrader: (1)

We used the LS2/7 short pulley pump on our '99 Fbody LS1 engine. We had to: use the CTS-V tensioner with (4) washers between it and the pump body, and space the pump out from the block with spacers from www.wegnerautomotive2.com. The above was done to get the Fbody serpentine belt to track properly on the new short pulley.

As an alternate to using the Wegner spacers, you could pull the LS2/7 pulley about 3/8" to 7/16" forward on its spindle shaft.

TXjeepTJ

iTrader: (8)

that would cost alot of $$$$$$$$$$$$$$$$$ lol


anyone know a successful way to pull the pulley forward? ive read to use a puller but a few people have messed up the pump by doing that. is there a technique? my pump arrives in a few days

danielgoforth

iTrader: (1)

Shoulda set you motor further back .

Oscar Will

I used a four-jaw Snap-on puller and applied just a very little bit of heat to the pulley as I started to build tension with the puller. The keyword here is PATIENCE......not to just crank the puller until pieces start to fly. Mine just started to slowly move as I applied torque, until it was where I needed it. I let it cool down a bit before I hit it with the MIG torch just enough to put a button at the end of the shaft to the pulley. That might be the cave-man way but the pulley is still perfectly straight and it works.

Pop N Wood

iTrader: (1)

Yeah, but a lot of people don't run the vette stuff, so there might be chance to get some used. The F body alt mount fits some cars better than the vette stuff.

Moving the S2 pulley farther out kind of defeats the purpose. If you need the clearance, running the vette crank pulley and water pump might buy you what is needed.