Posted: Sun Feb 05, 2012 5:11 pm Post subject: Exhaust crossover leak
Recently installed a ZZP plog and now have an exhaust leak where it bolts into the crossover. I have posted on several other forums, looking for as much info as I can get. I have found exhaust diagrams that show a gasket in place but no part number or description. Any help is appreciated.
I've installed a few PLOGs for people, and there is no gasket on the front manifold to crossover pipe;.. only at the rear. I don't list one in my parts catalog either. It's a slip joint fitting and relys on tightness and heat expansion to seal. All I can suggest is that your alignment is off on the cross-over and it's not getting tight enough all the way around. Or I guess it could be stretched out too far as well. Hard to say without seeing it.
Put the stock manifold back on and that leaks too should have never separated the two pipes! Looked into headers and realized they require removal of the cat or having a shop weld one in...running out of options.
I bet its your cross-over pipe itself. You can keep the PLOG, get a ceramic coated cross-over from ZZP and a heat shield, and call it a day. Just be prepared to drill out the rear studs where the cross-over attaches to the rear manifold. They always seem to snap.
Oh I didn't realize there was an option for a new crossover. And yes the rear crossover bolts did snap when I tried removing it. I also tried the 700 degree rtv and it just kept getting pushed out by the exhaust gases.
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