Try this:
Get a stethescope and get under the car and listen for exactly where the exhaust leak is coming from.
When you find it, back the nuts off a little bit, and reseat the heat exchanger in, tightening the nuts in a crosswise pattern.
I had the same problem, and it was due to the HE mounting a bit cockeyed, even though the nuts and gaskets were new, and the heat exchangers were flat.
-Lawrence
|