1998 Buick LeSabre limited review from North America

Engine manifold gasket developed leak into th engine and the engine seaized due to leak, this is manufacturer defect due to installing plastic causeing it to melt and develop leak blow my head gasket at 135000, in all the only problem was the leak I'm now installing a 2000 impala ls engine in it, it is ceaper then actual repair.

I would try This solution to problems with the plastic

intake manifold. The following is a cut/paste from Ken-Co Industries, which has

a Upper Plenum and Lower Intake Repair Kit. http://www.ken-co.com/manifold/default.htm

1-800-263-4283 It appears they do not sell direct, but can direct you to a

distributor. Here is their text:

Background:

Some vehicle owners are complaining of excessive engine coolant consumption, or

an engine coolant leak near or under the throttle body area of the upper intake

manifold. The problem is that the EGR passage melts the upper intake plenum, so

that composite material degrades around the EGR stove pipe and could result in

an internal or external coolant leak.

If the coolant leaks into the upper plenum it could result in "hydro-lock?of

the cylinders, requiring at best, spark plug and oil pan removal in order to

free up the engine's moving parts. This, however, does not correct the problem.