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Discussion Starter · #1 ·
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?

Thanks,
NRNM
 

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2015 STI Crystal White Pearl
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1. it doesnt matter which one you use, they're pretty much the same. if you use a newer wrx model pump, you just need to cap off the third nipple opposite of the other two nipples. that's for if you ever want to run an oem oil cooler sandwich adapter, which is $300 plus dollars from the dealership.

2. the stock feed is perfect, however you will need an extra heater hose to feed your turbo, that's all.

3. change your thermostat and seal, they're cheap, it's up to you. and don't forget the waterpump gasket. turbo or non-turbo, they use the same exact gasket.
 

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Discussion Starter · #3 ·
1. it doesnt matter which one you use, they're pretty much the same. if you use a newer wrx model pump, you just need to cap off the third nipple opposite of the other two nipples. that's for if you ever want to run an oem oil cooler sandwich adapter, which is $300 plus dollars from the dealership.

2. the stock feed is perfect, however you will need an extra heater hose to feed your turbo, that's all.

3. change your thermostat and seal, they're cheap, it's up to you. and don't forget the waterpump gasket. turbo or non-turbo, they use the same exact gasket.
Awesome, thanks for the quick response joejoe. Im starting to like the fact that the scoobies are like legos. Far cry from my rotaries.

Good call on the thermo and seal. I'll be sure to do that once Im taking it all apart.

I have access to a lift and air tools so I dont for see any problems taking it apart. Anything special I should know about the timing belt procedure?
 

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Anything special I should know about the timing belt procedure?
its fairly easy. it requires removing the tensioner and its pulley, then the belt is off. I suggest having a friend to help you with putting it back for your first time, the timing marks have to be dead on on both sides along with your crank mark. in order for you to put your tensioner back, you have to compress it on a vise and install a pin or similar into the small hole to prevent it from extending. once you install your belt, tensioner and pulley, pull the pin and you're good to go with a tensioned belt.
 
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