GM 3.1 & 3.4 V6 intake manifold gaskets
I'd like to ask folks what experiences they've had with the intake manifold gaskets for the GM 3.1 & 3.4 engines. Three out of three of my vehicles of this type have exhibited the problem. Two new vehicles: a 3.1 was replaced once under warranty. It was subsequently traded in on another (3.4), which supposedly had the newly designed gaskets - this has so far required two replacements (!), and finally a van purchased used (3.4) has also required two replacements. It's annoying enough when under warranty, but when you have to pay for it it's not an inexpensive procedure ($750). When my 307 Olds V8 required this, I did it myself. If you have ever attempted to get under the hood of one of the vans - well I decided to forgo that pleasure. What success have people had with the newly designed gasket?