My mate has a scooby,u.k model.
It blew up due to a chip change

so the subaru garage changed it all back to standard at his request.
They rebuilt the engine and when he was running it in , it fooked up.
in again and it done the same

.
they done it again and they run it in,blew up again!
in the end they fitted an engine out of a 30,000 mile car for him.
Seems to be going o.k up to now though.
Has been a bit of a head ache for him owning it, 99 model too.
Dave.