How can you tell the difference between an LS and GSR water pump? Is there a code on it that distinguishes the two? Thanks in advance.

 

On the pump gear, it'll either say 18T (non-VTEC pump) or 22T (VTEC pump).

 

oh ****, well mine says 19t on it. what the hell is it?

 

Maybe it is 19T. It's been a while since I've looked at that side of a B18B.

Regardless, I know for sure that VTEC water pumps are labeled 22T on the gear and the non-VTEC pumps are geared higher (numerically lower), and that's all you really need to know.

 

that's cool. just wanted to make sure i bought the correct timing belt for it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">Maybe it is 19T. It's been a while since I've looked at that side of a B18B.

Regardless, I know for sure that VTEC water pumps are labeled 22T on the gear and the non-VTEC pumps are geared higher (numerically lower), and that's all you really need to know.</TD></TR></TABLE>

Non-vtec pumps are 19 teeth, just to confirm.

 

are the water pumps interchangeable while using the proper belt?

 

ok... soooo i wanna clear this up MUCH MUCH confusion. some people say the ITR oil and water pumps flow the best yada yada.. yet honda uses the same part number for all models of their pumps.. is the only difference the external gear on the pumps that contacts the belts?

 

vtec water pump is 22 teeth and ls is 19teeth
if you want to use a ls water pump you will need a ls timing belt and same goes for the vtec water pump and timing belt

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by evsproject94 &raquo;</TD></TR><TR><TD CLASS="quote">are the water pumps interchangeable while using the proper belt? </TD></TR></TABLE> NOOOOO the vtec belst have a different # of teeth than the non vtec's do. i dont know the exact # though.. sorry for the vague but somewhat helpful answer

 

let me rephrase the question can i use a gsr belt and pump on my ls?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by evsproject94 &raquo;</TD></TR><TR><TD CLASS="quote">let me rephrase the question can i use a gsr belt and pump on my ls?</TD></TR></TABLE>

yes, you can.

 

thanks for the info ps. the gsr waterpump should just bolt up right?

 

my question still stands.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cougar10ag &raquo;</TD></TR><TR><TD CLASS="quote">my question still stands.</TD></TR></TABLE>

sorry, i personally can't answer your question because i've never wanted to disassemble a water pump for rebuild.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by evsproject94 &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the info ps. the gsr waterpump should just bolt up right?</TD></TR></TABLE>

correct, most b series parts are interchangable. you can use either the ls/si/gsr water pump on your ls motor.

 

awsome

 

I really have some doubts about the GS-R pump being good for a LS... the GS-R has 22 teeth while the LS has 19. So the GS-R is going to have a larger gear, which means that it will spin slower at any given engine RPM than the LS pump. I would suspect that this is because of the GS-R's higher redline... they probably didn't want it to get spinning too fast. And that slow down is probably acceptable because the GS-R also has less dependence on coolant, since it has oil squirters to help cool the cylinders.

 

will a 2000 gsr waterpump work on a 94 ls?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by evsproject94 &raquo;</TD></TR><TR><TD CLASS="quote">will a 2000 gsr waterpump work on a 94 ls?</TD></TR></TABLE>

yep, any of the 94-00 pumps will work.

 

The ONLY difference between the vtec and non vtec pumps is that the vtec pump has 22 teeth compared to the non vtec pump which has 19 teeth. The impellers on both pumps are the same.

Any vtec pump with work with a non vtec motor assuming you use the vtec timing belt and vice versa.

There is no difference between an ITR water pump and a GSR, or Si/SiR water pump for that matter. They both have 22 teeth on the gear and the same impeller.

HTH.

Adam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by arw321 &raquo;</TD></TR><TR><TD CLASS="quote">The ONLY difference between the vtec and non vtec pumps is that the vtec pump has 22 teeth compared to the non vtec pump which has 19 teeth. The impellers on both pumps are the same.

Any vtec pump with work with a non vtec motor assuming you use the vtec timing belt and vice versa.

There is no difference between an ITR water pump and a GSR, or Si/SiR water pump for that matter. They both have 22 teeth on the gear and the same impeller.

HTH.

Adam

</TD></TR></TABLE>

yeha i'm guessing it's the same for the oil pumps too.. cuz people on ebay try to get a shitload of money buy selling ITR water and oil pumps saying they flow better and ****.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Weston &raquo;</TD></TR><TR><TD CLASS="quote">I really have some doubts about the GS-R pump being good for a LS... the GS-R has 22 teeth while the LS has 19. So the GS-R is going to have a larger gear, which means that it will spin slower at any given engine RPM than the LS pump. I would suspect that this is because of the GS-R's higher redline... they probably didn't want it to get spinning too fast. And that slow down is probably acceptable because the GS-R also has less dependence on coolant, since it has oil squirters to help cool the cylinders.

</TD></TR></TABLE>

I agree with you, i doesn't sound right

 

The reason that the GSR Pumps are made to spin slower is because it will be spun at higher RPM, resulting in Cavitation or a lack of flow due to the pump's gear chopping the water instead of pumping the water...This is similar to when a Turbo's Compressor passes its effeciency range and heats the air instead of pushing the volume...

 

b18c and b16a oil pumps are designed to pump oil at a higher pressure because of 1) VTEC, 2) High RPM, and 3) More oil flow passages...They are not identical to LS Oil Pumps, though they are physically the same size and mount to the engine in identical fashion as the LS pumps...Hence, using a Vtec Pump in a LS engine for LSVTEC and/or Turbocharging...