Buick Century 3.1 V6 TSB info needed

The first one refers to the infamous leaking intake manifold gasket problem on the 3.1L and 3.4L engine. It advises that a new intake manifold gasket, part# 89017279 is available which should have better sealing.

The second one states that new piston assemblies with polymer coating are available for the 3.1 and 3.4 engines and should be used whenever piston replacement is necessary. It doesn't mention why, but it's presumably to address the piston slap and/or piston scuffing problems that some of these engines have had.

This one also cautions against using these teflon pstons on onything past the 1999 model production year.

Regards, Al.