[V8] wondering if I can use some vasoline to......

[Kneale Brownson]

I had an employee whose brand new Dodge truck quit running during a vacation trip after some warranty maintenance procedure where the dealership flunky used silicone as a sealant somewhere in the engine and it ruined the O2 sensor.

Tony and Lillie <tonyandlillie1 at earthlink.net> wrote:  Yes, silicone, even in small amounts is harmful to an O2 sensor. One of the 
things tought in the early fuel injection days, as O2's were just coming 
into commonality.