i have a 93 ej1. im replacing the head gasket. while i was in there i want to replace my waterpump. i read that somewhere you should use a b18 waterpump with 19 teeth compared to the stock 22 teeth one. with less teeth it runs a little slower therefore keeping it cooler. fluid has more time to cool before it goes back into the engine. which b18 waterpump should i get, or should i just stick with the stock, my engine is a b16a jdm so i would get a b16a2 stock waterpump right.

which is better b18? or stock?

 

or should i go with a 94 del sol waterpump or a 99 civic si? b18?

 

i'd say go with the stock so you know it will fit. goto the part store and match them up...

 

well since my b16a is jdm. the previous owner told me to buy parts for the 94 del sol or the 99 civic si. would that mean a stock waterpump is either from a 99 civic si (b16a4) or a 94 del sol (B16a2/b16a3) right? will any of these water pumps work or what im confused.

B16A2
* VTEC
Found in:
o 1992-2000 Honda Civic EDM VTi (EG6/EG9 & EK4)
-> o 1992-1997 Honda Civic Del Sol EDM VTi (EG)
-> o 1996-1997 Honda Civic Del Sol USDM "VTEC"
o 1999-2000 Honda Civic USDM Si (EM1)
o 1999-2000 Honda Civic CAN SiR (EM1)
o Displacement: 1,595 cc (97.3 cu in)
+ Bore×Stroke: 81.0×77.4 mm (3.19×3.05 in)
+ Compression: 10.2:1
+ Power: 160 bhp @ 7600 rpm & 118 ft·lbf (151 N·m) @ 7000 rpm
+ Transmission: Y21 or S4C
+ Redline...8,000 RPM
+ Rev Limit...8,450 RPM
+ VTEC Engagement...5,500 RPM

B16A3
* VTEC
* Found in:
-> o 1994-1995 Del Sol VTEC
+ Displacement 1,595 cc (97.3 cu in)
+ Power: 118 kW (160 PS; 158 bhp) @ 7,600 rpm & 118 ft·lbf (160 N·m) @ 7,500 rpm
+ Redline: 8,200 RPM
+ Transmission: Y21

B16A4
* VTEC
* Found in:
-> o 1996-2000 Civic Si-RII (JDM version) (EK4)
+ Displacement: 1,595 cc (97.3 cu in)
+ Compression: 10.4:1
+ Power: 130 kW (177 PS; 174 bhp) @ 7800 rpm & 111 ft·lbf (150 N·m) @ 7300 rpm
+ Redline: 8000 rpm
+ Transmission: Y21