Hi guys.
It's been a while since last time i posted on this board.
Life kept me away from this car but now i'm back on it.
I've had an o2 problem since my stepdaughter overheated and cracked the heads.
So basically since i partially rebuilt the engine.
New heads, new gasket...
Since the error says something like insufficient treshold, my investigation lead me to believe there's an exhaust leak.
The sound of the car confirms that thought. So i started removing the whole system hoping to find holes, cracks, corrosion signs or anything obvious.
Even though every component looks in good shape i have found something that looks pretty weird to my eyes.
The cross over pipe that connects the two headers only has a gasket on one end (the one that goes to the header on the back of the engine).
The part that goes on the front header has no gasket at all.
I went on http://www.gmpartsdirect.com/auto-pa...omponents-scat trying to find a part number or a good illustration of what i need and the picture looks kinda confused...
Btw the only gasket that it shows me is the 1647558.
When i go on ebay looking for that number it shows me a gasket that looks identical to the one i have for the part that goes on the back of the pipe.
Also the part of the header that couples with the pipe looks shaped perfectly to fit on top of the pipe (even without gasket), and it looks not possible to me that the seal mentioned above (donut shaped) could ever match the two surfaces.
What really confuses me tho is that when i go on rockauto looking for a cross over pipe it shows me this one that has two gaskets apparently IDENTICAL:
http://www.rockauto.com/en/catalog/p...ver+pipe,16090
Now could anybody please tell me what the deal is with this cross over pipe?
Thanks
