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i have a 96 gsr motor with unknown mileage. a friend has a 2000 Si water pump for me if i want it. motor is out so its a simple job. low on cash for a new pump. both look real similar. 22 teeth. any reason i shouldn't do it?

 

The only thing I can think of that would be different is flow rate, but they are probably the same. Do you or your friend have Helm's manuals?

 

yeah they are all interchageable i have a p30 on my ls/vtec man theer is a huge differeence man it is so much bigger.

 

The only difference is the size/# of teeth on the gear.
If you use a B18A/B pump on a b18c then you need to use the b18A/B belt.
B16A has to keep the B16A/B17A/B18C pump because the belt will not
fit properly otherwise.
B18A/B/B20 can use the b18c/b16a pump but it has to use the B18C belt.

 

you are correct sir!

 

can a JDM B16a pump be rebuilt using US replacent parts..???
just curious..??

 

Not sure why you'd want to rebuild it. They are very cheap.

 

no they are not interchangeable in terms of fitting the belt cover.

greg

 

All vtec pumps are the same. I got mine from a 99-00SI for like $50 i think.

 

Just picked up a used GSR water pump in good condition... I know it's advised to replace the gasket, but I want to put it in ASAP... can it be reused?

 

The pump itself is not bigger, just the pulley. The reason it is different than the LS is that the VTEC motors rev higher. With the smaller diameter pulley of the LS, it would spin faster, and possibly cavitate. It would be wise to use a VTEC water pump on any high revving LS.

 

thanks, thats good to know. glad you posted.