Listers:
This probably has been covered at some point - if so, apologies in advance
as I missed it......
Recently a Toyota mechanic mentioned to a buddy of mine that at his shop,
they run a tap through the threads to clean them up everytime they change a
spark plug on a car, especially those with Al engine pieces.
That seemed like a good idea to me, especially since I've occasionally seen
a plug not thread back in as easily as it should during the lifetime of
some vehicles.
My questions - is there a down side to doing this (i.e. forcing a small bit
of gunk/metal into the cylinder)? What taps would one typcially need to
have on hand to be able to do this for a range of common plugs (i.e. my TR6
through my Honda daily driver or my tractor)? How would one know what tap
to use for a specific plug (is there some kind of chart)?
Also, I'd appreciate a brief write up to use if someone could pass it on to
me - i.e. whether or not to use a bit of tapping fluid or perhaps grease to
immobilize any dirt, etc.
As always, thanks in advance.
Ned Corcoran
1971 TR6
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