Originally Posted by
Kingdav1954
heat degradation ?? The only thing that travels through it but does not touch it is air.
Yea, but since the manifold is bolted to the engine that averages 190 F, there is bound to be some heat buildup.
What I can't figure is that this same O ring is in the oil filter assembly that also averages 190 F, so why wouldn't it deteriorate there too ?