more info. Stanyl are still pushing PA46 as the way to go for chain tensioners. Looks like they are the suppliers to the factory that casts the chain tensioner pads (still havent found out who that is, could it be Borg-Warner?). Although I could be worng, other factories make a material called PA46 too but with different properties, for example:
http://www.piedmontplastics.com/prod...n-46-pa46.aspx
300F is only 148C, not much above engine operating temperature.
http://www.dsm.com/en_US/automotive/...ng_systems.jsp
"The material gives you solid performance across the engine’s lifetime when dealing with high chain tension"
I have to disagree with them, the pad failures that have been posted so far is proof to me that PA46 starts losing its structural properties after approx 100,000miles in a engine oil environment, which is hardly the lifetime of the engine. Unless our pads are made of some other weaker PA46?