Thread: Upper Intake Manifold Replacement [*]

Glad to hear it Mike. A couple of things you should know about that plastic upper.

The only real issues with it are either a TB gasket leaking or the famous cracked UIM that spews gallons of coolant into the motor. The second part, can be permanently cured by plugging the coolant ports in the LIM. This can be found in a thread by me on "how to mod a lim". It also goes into opening up the side cover area to offset the blocked coolant. I've never heard of anyone having an iced up TB and needing the coolant going to it. Plus, if any one ever looks at how much coolant enters the TB..it appears to be very very little. I've run blocked coolant many years and it's never been an issue. By blocking that, you could reuse your existing UIM and never worry about it failing.