What silicone sealant?

[woldson]

I was reading popular mechanics and came across some very interesting information. "Do not use silicone sealant, even the type ratedfor high temperatures and touted as "sensor safe." Here's why: Some silicones release silicates as they cure. So when used on engine gaskets, they contaminate the oil. The oil is drawn through the PVC valve into the intake manifold and eventually winds up in the exhaust, where it coats and contaminates the oxygen sensors. Ditto for silicone sprays and lubricants."

 

Personally I've always used blue rtv cuse I think it is pretty:tongue:!

 

I assume this is true because of the source, however, I've not heard this in all my years of working on cars! I've seached a few key words and found nothing on this matter, (then again I have problems finding phone numbers in the phone book} in the almighty seach function!! I know that not everyone runs a PCV on all engines builds, though, some do because of pressure differentials.

 

BTW: scramjets how cool is that!!!!!!!!!!!!!

[woldson]

Has no one heard of this? What can be used instead?

[Pop N Wood]

I know that O2 sensors, especially wide band ones, can get destroyed if silicone gets on the sensor from either the inside or outside. But I have never heard of it leaching through the oil.

[woldson]

Niether did I. Guess need to be carefull with all engine additives such as slick 50 and such. If you dont use a pcv then you don't have to worry. I.E. engine vapor recirulate.