Thread: Vac leak, TB at Plenum.

Hey guys, figured I would start a new thread on this one specific problem I discovered tonight. I am having a chuging or stumble on hot starts only, and got looking for Vac leaks tonight. I was inspecting the TB, and noticed that there is a small Gap between the TB and Plenum. Stethoscope confirmed my suspecion of a leak. I dont know if the previous owner had the TB off at one point in time and did not get it seated back on properly, or if the Plenum its self is actually warped.

What is between the plenum and TB for a gasket? is it a paper gasket or an o-ring? Much work to pull the TB?


Heres the pics I took with my BlackBerry.



FRONT SIDE





BACK SIDE





What are your thoughts?




Jay

Throttle body is 3 bolts. Get a new gasket for it, IIRC l36 uses a paper gasket also.

I'd say the bracket from the side of the TB is likely missing. Usually people dont' have trouble once it's gone..but it's there from the factory and it's a pain to work around so most guys don't put it back on. It spans from down on the LIM to the TB by the TPS sensor.

I picked up a TB gasket today from the Dealership...$24 bucks my cost. I would throw it on right now but the GF has the car in London right now. Wont get around to it till tomorrow night at the earliest. Im almost positive its leaking, but I will spray some carb cleaner in that area to see if it will confirm the leak.

Jay

sorry to revive this but mine looks exactly the same way.. did u ever fix it or is it warped

Overall it's pretty common and usually a fresh gasket helps it.

Does your TB have a bracket to the LIM holding it up?

yea theres a bracket there