Having had a replacement short engine on an MY98, and now got piston slap again after 15k, I am concerned about the current remedy of replacing the piston (albeit with a coated unit). My understanding is that a bore has to be honed to ensure that the rings bed in and thus form a gas tight seal. So with the current fix, is the bore re-honed so ensure the new piston/rings bed in? If this is the case then to prevent the honing grit contaminating the rest of the engine then it would need a complete strip down/flush. I may be wrong, but was under the impression that the new piston is just fitted - how will this seal in a worn bore????

Any ideas - are Subaru cutting corners?

Guy

 

they're not cutting corners but with only 15 mls on it how much wear do you expect there to be. there should be none at all i have never seen a subaru bore that has not still got the original honing marks still on it so wear is very minimal if any at all