I'm getting ready to do my b20 with a vtec head sapw in my 92 hatch, I heard that I should replace the b20 oil and water pump with a gsr since the pumps will cool more during vtec. Is this true or can I get away with using the stock b20 pumps. what else do I need to replace when I do this swap in order for me to get my car running right?

 

Coolant pump: I'd replace the B20 coolant pump (19tooth) with a any Vtec (22tooth) coolant pump. Keep in mind that you must use a B18C1 GSR timing belt with a 22 tooth coolant pump.

Oil pump: I used a B20 oil pump (looked up part for a MY 2000 CRV) which cross referenced to be the same as a Vtec oil pump. You may be in good shape to use your oil pump, but check out the clearances to be safe. Otherwise source a newer B series oil pump. **can anyone add to this, of at least verify that newer B series oil pumps are similar?**


[Modified by SLPR, 10:54 AM 7/24/2002]

 

are you sure about this? i just ordered a B16A water pump and i got a B20 timing belt for the B20/VTEC im building, so its necessary to use the GSR belt? anyone else kno about this?? thanks

 

well, it would have to do with the lenght of the belts.

teh B20B has a 19 tooth pump which is smaller diameter gear than teh 22 tooth pump gear...

so it would follw you need a longer belt than the B20 - hence the GSR.



t..

 

what about the oil pump gear? is the B20B gear the same as a B18C? if so looks like i'll be having to return this belt


[Modified by slooowDX, 11:20 AM 7/25/2002]

 

The oil pump drive is the same size between all of the B series oil pumps.

Yes, you need the GSR timing belt. It is a tad longer than B16, LS, and CRV timing belts.