Hey Guys,

I'm finding that when I give my car a good flogging. The coolant pushes into the overflow bottle. Im not game enough to push it any further as Im sure it will burst out of the over flow bottle. I orginally thought it was a head gasket but she doenst over heat at all. She runs really well. Although what bothers me is how the coolant doesnt return back out of the overflow bottle. It seems to just sit in the over flow bottle.

A bit of background on my car. She's running a full 3 inch exhaust and been been tuned. How much power. I have no idea. What I suspect has happened. While it has been tuned by the previous owner. The car has had too much boost put though it and has stretched the head bolts causing head lift. Am I on the money or should I be looking at something else?

Can someone tell me if theyve had a similar issue with their MY06 STi and what was the fix?

Cheers

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MY06 STi