Hi guys, looking for some advice, i have just bought a '99 wrx and i'm planning to put my '97 engine in, does anyone know if i need to use different pulleys or will the ecu read the '97 ones ??

Ian

 

When you say engine do you intend to replace the short or long block?

IIRC the pulleys will not be compatable but that's the least of your worries as the heads will not match your inlet manifold, fuel rails etc.

 

I have all the 99 inlet manifold and throttle bodies, whats the difference between short and long block ??

 

Short block = just the block, no heads
Long block - full engine i.e. block and heads

97 and 99 heads will not take the same manifolds or pulleys and probably not even take the same cam covers etc

 

ok, i have a complete engine from the 97 wrx and i can get hold of the 99 heads but they require work to the cam journals cams and a skim as they got hot and have marked, was hoping that i would be able to drop my engine in without to many changes, starting to look a bit more difficult now, any suggestions, just checked and your right the inlet ports are diffrent could i use the 97 manifold with the 99 loom ?

 

no.. the 99 uses a stepper motor for the idle, the 97 a solenoid..

You really need to either buy another long engine from a 99 and sell the 97 or get 99 heads on the 99 short engine and sell the 97 heads.

Simon

 

ok thanks simon much appreciated