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