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Old 07-15-2008, 09:16 PM   #1
Scooby Newbie
Member#: 177098
Join Date: Apr 2008
Chapter/Region: MWSOC
Location: Davenport, IA
95 Legacy L AWD

Default Turbo water pump on EJ18 ?'s

Well, Im slowly but surely collecting parts for my EJ18T build on my daily driver and have noticed a nice oil leak from the front cover of the engine.

Im sure its the oil pump seal or front crank seal so I'm just going to crack it open and repair them both.

Question is, since Im in there I might as well repair the timing belt and replace the water pump.

Since Im going turbo in the near future I'd like to replace the water pump with a turbo pump since Im going forced induction anyway.

1. Should I use the EJ22T water pump or the EJ20T pump from an '03 WRX?

2. Am I going to require any different coolant hoses from a turbo model to mate up with my stock EJ18 motor/coolant system?

3. Anything else you guys can recommend?

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Old 07-15-2008, 11:21 PM   #2
Matt Monson
Scooby Guru
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
99 2.5RS, '85 911
'73 914 and 2012 BRZ


The only point in using a turbo water pump would be if you were going to add the oil cooler. You will need different coolant lines. There are two extra bungs on a turbo water pump. One is for the cooler and the other one is for the overflow tank. Depending on how you are doing your turbo set up and cooling it, you could potentially use all factory parts to make this happen.

And an Ej22t and Ej205 water pump are pretty much the same.

If you need help pulling together the hard lines and a coolant tank let me know. I have all of them. I may also have an oil cooler as well but I would have to check.
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Old 07-15-2008, 11:56 PM   #3
Scooby Specialist
Member#: 111735
Join Date: Apr 2006
Chapter/Region: South East
Location: Philly for now
96 Legacy2.0GTSOLD
Bimmer Tech


The other point to using a turbo water pump is that the WRX/STi exhaust manifold doesn't fit with teh stock waterpump without some crazy rad hose routing.
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