What do i put on the spark plug tube Orings?

[ninsei]

Hi. 'got an oil leak at a spark plug tube. I have the new tube and both new O rings. What do i put on the o rings before install? i heard something about "tire mastic" ?

[Loren]

What year is your car?

[JFP in PA]

Clean engine oil is fine, dielectric grease would be better.

[ninsei]

It's a model year 2000. Any specific brand grease? I don't see why any of these greases is better than just clean engine oil on them, before install.

[JFP in PA]

Dielectric grease is what the Porsche OEM (and severely overpriced) lubricant is, it is a type of silicone lubricant which seems to allow the tubes to seat a bit easier. We have used dielectric grease we get in toothpaste-like tubes from our local NAPA supplier for years in the shop; works fine, never had any issues. A 3 Oz tube costs a couple of bucks, lasts just about forever, and has many other uses............

Edited October 8, 2012 by JFP in PA

[White987S]

and has many other uses............

TMI. :)

[JFP in PA]

Oh where some minds will wander................................ :eek:

[DBJoe996]

What...what?? Did I miss something?? I use that stuff all all kinds of sliding mechanisms, it is really slippery and doesn't dissolve in other liquids. Should be in every good mechanics drawers..... :jump:

[Dharn55]

I used an engine assembly lubricant which is made for internal use and has no effect on the oil. Just my $.02 worth.

[ninsei]

But that dielectric grease shown, doesn't say high-temp. Shouldn't it?

[Loren]

The grease is just for installation purposes - after that it melts away and the 0-ring seals.

[JFP in PA]

But that dielectric grease shown, doesn't say high-temp. Shouldn't it?

No, it is just a lubricant to get the tube inserted without damaging the orings; after that is just along for the ride........