<VV> Spark plugz

[Bill Elliott]

>
>
> You can generally get away with this, but it could conceivably cause 
> problems if you run F series plugs for a while and then try switching 
> to a full-threaded plug like an FF, FFS (Jim Davis explains the FFS 
> well), or somebody else's with similar shell geometry.  In that case, 
> you should run a thread chaser *before* the new plugs down through the 
> holes before switching to clear the "dam" of accumulated carbon.
>
>
Let me expand on Jim's excellent suggestion here... especially with 
aluminum heads, I think that ALL threads should be chased whenever you 
change plugs (even if you're not changing plug designs). It's very good 
insurance.

Bill Elliott


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