Quote:
Originally Posted by thetenfold
As far as I know, yes. What's the difference between upper and lower? The upper intakes air and has the maf, iac, tps and the lower is what exactly?
|
The upper is the plenum where the throttle body connects. Lower is below the UIM and connects to the cylinder heads. Both are common problems on the Series II NA 3800 engine. I replaced mine. It is not of matter of if they will go bad but when. The sludge means an issue with these gaskets.
Let me know if you need pics.