2003 Subaru Forester Q&A

2003 Subaru Forester Question: knocking noise &warranty of drive train(pistons)

I took my 2003 Forester(manual trans) for an oil change with a concern about a "knocking" noise ..Dealer said it was the "pistons,but they have to take the engine apart. to be sure... for a repair price 0f $2000 -$4000 . Isn't this part of the engine under warrant? -
Answer 1
Do you have a warranty that covers the drive train? -
Answer 2
Pistons would not give a problem in this engine unless the engine was seriously overheated in the past or had really infrequent oil changes. -
Answer 3
try Subaru's upper cylinder cleaner it could be as simple as carbon build up a very common problem with vehicles not serviced at Subaru -
Answer 4
The knocking noise is apparently piston slapping from the short pistons in the top end. This has been an issue from 1998 up to and including the 2004 model. I have been told by a subaru dealer that Subaru oredered a "rebuild" for this to switch the pistons back to the long pistons that came with the pre 98 model and that are now standard after 2005. I have been told that subaru will cover this cost. Hope this helps -