Mike :
You've already gotten good replies : Make sure your plugs are 1/2" reach
(this refers to the distance from the end of the threaded part to the
gasket surface), and use anti-seize on the new plugs. Wouldn't hurt to
chase the threads in the head, either. The plug threads are metric,
M14-1.25, and it's probably best to buy a tool made especially for
chasing spark plug threads. Any auto parts store should have one.
I'll add that PB-Blaster, or carb cleaner, may work better on loosening
the old plugs than WD-40. IMO WD-40 has lots of uses, but penetrating
oil is not one of them. The "loosen, tighten, loosen, tighten" is a
good idea.
Randall
59 TR3A
Mike Barron wrote:
>
> Tried to remove and replace the plugs on the "weenie" a few weeks ago
> (TR3) and got two out, and gave up on the other two, and tightened
> them back up. COULD NOT get them out. Going to try using WD40 to
> lubricate the threads by loosening, spraying, tightening and
> loosening, and repeating the process until plugs come out. Question:
> How do I prevent this in the future? (Providing I am successful in
> getting them out this time)
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