Hi people.
Got a 95 wrx and ive blown a hole in no3 piston and this has happened before to the bloke i bought it off and had another engine put in.
Ive had ideas of forged pistons and rebuilding it as i found out why it has done it again. The block and crank etc are good.
Im a mechanic but i need some info on the engine ie rebuild manual to make it a bit easier if anyone can help??
Also where can i get forged pistons for it as ive had a quick look and noone seems to have any idea.
thanks

MIKEY B

 

Zen Performance - Performance upgrade solutions for Japanese cars
- Flat4online.co.uk Subaru Impreza Mitsubishi Evolution EVO Walbro Fuel Pumps Injectors Intercoolers
www.rogerclarkmotosport.co.uk

i've got a cd wihich has exploded diagrams of the engine,servicing etc.

 

Same problem with two different engines? I'm no expert but surely that points to that cylinder running hot or lean - either way a Walbro fuel pump and/or an adjustable fuel pressure regulator might prevent this happening over and over again.

 

Not really, number three is always the first to go pop on the EJ for three reasons:-
1/ end of fuel rail loop so any issues affect 3 worst
2/ Its right nest to the turbo and upipe and downpipe and cat so gets lots of heat put in it
3/ Its on the manifold side with the coolant expansion tank heating it up thus raising the IAT's on that side as well.

All in all If I was choosing a piston to be, it wouldn't be number 3!

Simon

 

THANKS FOR THE REPLY
WHERE DID U GET THE CD FROM??

 

SILENT RUNNING
FOUND THAT CYLINDER 3 WAS TOO LEAN DUE TO LOW FUEL PRESSURE AT TOP END THIS WILL BE SORTED WITH A WALBRO PUMP AND REG AS YOU SAID


THE ROOKIE THANKS FOR MAKING TRUE WHAT I THOUGHT HAD HAPPENED AND I WASNT GOING CRAZY

 

A mate gave me a copy have no idea where he got it from.
If you want a copy i can send you one if you want.

 

yes please m8
where are u?

 

Glad to be of help!