Originally Posted by Hans
the uims dont fail the gaskets do
My gasket is trashed and needs to be replaced- coolant is leaking out about 1/2 gallon every few months) but It is too cold outside to rip everything apart (well mainly getting the TB off is the hard part on the l27s)
We need to be careful to be specific, in that you are talking about the S1 or L27 when you say that the UIM'* don't fail. Because they certainly DO fail on S2 3800'* there is an actual degradation of the plastic on the UIM, caused by the excessive EGR heat, that causes UIM AND gasket failure.