Hello, we have an extremely clean '92 Buick Riviera 3.8L that's starting to show some white/gray foamy muck around the intake. The dealer indicated that the intake manifold gasket needs replacing. As you can imagine this is a pricey repair, mostly labor.
I've done water pumps, timing chains, and other similar engine repairs on earlier model GM's, so I am considering doing this job? Any advice, pointers, resources, etc.? Will it be necessary to have the AC evacuated/recharged? Is this a common repair for the 3.8L Buick (I was told so)?
Thanks,
Steven