Can't seam to kill this damn leak...

[georgio440]

So I just got my car back from getting a new motor put in it at Ford (excellent job, BTW), and I still have a slight exhaust leak on the passenger side where the x-pipe meets the header. It has a new gasket in it and everything, but I still hear it. You can't hear it at idle, but in the low RPMs when accelerating, you can hear the sound of air (pretty quiet though). It's not a loud leak by any means, and it's not making that annoying rattling noise that most leaks produce. Any ideas as to what I can to? I'm assuming that the bolts are as tight as they can be since Ford just reconnected them to the headers, but I dunno. I'm starting to think maybe the upstream O2 sensor is a bit loose. I'll have to check it out this weekend.

Any input is greatly appreciated, thanks.

 

[BurningRubber]

Get under there and make sure it it snug...

The gasket could have been defective or damaged upon re-intallment, unlikely but possible.

Glad to hear its up and running again.

 

[georgio440]

Yeah, aside from this minor sound, its running amazingly. The motor has about 350 miles on it, break-in is until 1,000 miles. It's so painful. I can't wait to let her loose!

BTW - I had this slight leak before the new motor, just to clarify. I'm thinking maybe the Pypes O/R X doesn't fit that well.

 

[BurningRubber]

Probaly so then, that or there may be a small hole in it if you bottom out alot on the pavement.