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.
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from email@example.com
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.