Passenger up pipe won't seal

[JJR]

I have a early 99 and have the famous up pipe leak. I replaced the factory donut with the chevy 350 one from carquest having herd good things about it. Well it still leaks passenger side only drivers side is still factory original and is fine. Not going to touch that one. Question is do I try the factory one or another chevy one? Is there something better? Is there a International one that works better? If so part # please. Thanks.

[bigb56]

Is the pipe distorted or pinholed?

[JJR]

No it was in good shape. Truck only has 92,000 on it.

[bigb56]

Well I don't know, others have used the Chevy donuts sucessfully. Maybe you got it in there crooked. Did you get new bolts or clean up the old ones, maybe they are not pulling up all the way due to dirty/corroded threads.I was planning to do just what you did. Theres a good thread on it, I'll try to find it.

Here it is: http://www.thedieselstop.com/forums/...askets-257570/

[JJR]

Reused old bolts after cleaning them. The gasket did seal for a while before it started leaking again. Maybe I will try it again with new steel bolts not a fan of the soft stainless ones I think they stretch.