+1 on this, without a remap an induction kit is a big no no

I will be amazed if Subaru uk foot the bill, in fact if they here as much as a mouse fart near a 2.5 they run a ******* mile.

Siv

 

well whatever they say I am going to get the engine rebuilt with forged pistons etc as i can't
really be arsed to argue the toss with them about it with them plus I don' really want another set of chocolate pistons.

 

Good for you, small consolation I know but when it’s all done you will have a fantastic car on your hands.
Congratulations for being different, so many people fall away into the masses and wash their hands on Subaru.

Good luck with your build

Siv

 

fully forged, closed decked, job done

 

lol yes I can believe that . I thought this problem was now sorted ?? I have a 2008 sti and know these were risky cars to own. mines still going strong so I think pistons in mine may be ok, after all this time. I live in hope anyway .....

 

For some reason a few people always argue and says it was fixed, despite being told otherwise.

Built right 2.5 is a fantastic engine, problem is its not built right from the factory

 

unless your dive it like a muppet and look after it its very unlikley that will happen

 

well seeing as subaru are being ***** about it all they can go and do one so that' why I am getting it sorted myself.
I don't intend to built a monster of a car as project wagon is being done at the moment which will be a beast.😁

 

Have you spoken with Subaru regarding the failure?

I have an MY17 so it would be good to hear what they say on the subject.

 

throw a rod? how so if its closed decked and fully forged?

 

operator error

 

17 plate has got the same engine so same thing could happen if your unlucky.
complete rethink on there part concerning the pistons and the silicon content of the alloy.
there piston tolerances are far to tight aswell.
so many of these engines have let go over the Yeats for mainly the same problem so you would have thought subaru would have looked into it by now.

 

engine coming out today so should have some news hopefully by Thursday at the full extent of the damage.
will post some pics up if I can get some.

 

Just for information.
You've admitted what you've fitted as a modification on an open forum which Subaru do Monitor so any claims will be a bit hard to authorise after that.

 

subaru have known from the word go about the filter so I've got no problem with that but it was recommended by the dealer I bought the car from at the time.
to tell you the truth even if they offered to replace the standard pistons I wouldn't want them because of the known failures with the ring lands.
ringland failure after only 6500 miles.come on subaru you can't say that there isn't a problem with these. it would only be a matter of time before they go again of which i wouldn't be comfortable with.
I'd rather pay for my own builtd with decent pistons with a realistic clearance .
2.5 sti pistons strong=yes
brittle=absolutely

if anyone from subaru is reading this then I am willing to send you the failed piston so you can carry out any metrology tests if your interested.

engine has just come out today and there's loads of oil in the intercooler/exhaust and breather system it's a right mess.
will post a pic of the offending piston as soon as it's out.
thanks

 

and here is the offending piston!!!

 

The top of the cylinder wall dont look too good

 

a full assessment of the damage will be posted up tmrw .
Mahle pistons going in plus 11mm head studs etc

 

I think you will find that's the piston skirt resting on it..........

 

Air filter or not .. its ridiculous that a modern STI would fail like this..

Your quest to rebuild is awesome.. keep us posted ..

 

latest is that the engine is stripped and has been examined and this is the outcome
1.fueling ok
2. no sign of any det
3. #2 bore is scored and slightly oval

so subaru UK what's your excuse for supplying an engine where the bores are oval??

 

I love the idea of a 2.5 STI. But all these failures just put me off massively.
Subaru need to sort it out.

 

UK STI doesnt exist anymore so they solved the problem

 

Yeah, fair point. That is some 'out side the box' problem solving from Subaru!

 

haha yeah.

a very successful job of killing of a fanatical (and i dont use the term lightly) following in very short order,

 

spot the ****ed piston!!

 

Have they discussed warranty with you or are they shirking it?

 

slight possible issue there because of a air filter but I think that's rather irrelevant considering there is most likley a manufacturers defect of which they can't say wasn't known but just ignored.

someone said subaru UK watch this site so I am very surprised that I've heard nothing from them or are the just burying there heads in the sand yet again.

 

any updates on this?

 

well the latest is subaru have been a bunch of tossers and don't want to even contribute to it so as far as I am concerned they can go **** themselves.
apart from that I have now got a decent engine thanks to Andy Williams with forged mahle pistons ,11mm stud kit and acl bearings.