[Vwdiesel] RE: Interesting GP Note (fwd)

[Val Christian]

Here's a reply from my youngest brother.

Forwarded message:
> To: "Val Christian" <val at swamps.roc.ny.us>
> 
> Val,
> 
> I thought the lack of grease was to prevent carbonization of the
> glowplug thread (heating grease at high temp and making carbon atoms)
> which would form an abrasive in the thread. Nickel plating shouldn't
> react with the grease, and neither will aluminum (unless the grease is
> acidic, which it could be), but since nickel and aluminum slide pretty
> well, there is no risk of seizure (unlike, say, iron to iron).
> 
> -Noah
> 
> > Does anyone understand the mechanics and chemistry of nickel plating=20
> > in an Al cylinder head?