"Phil Kyle" wrote in message
.. .
Harry Bloomfield verbally sodomised in
:

Shep© laid this down on his screen :
If the engine is running good and the electrodes are not adversely
worn,keep dem plugs.

I agree with that.

Plugs have only three failure modes...

1. The electrodes wear out.

2. The insulator electrically breaks down.

3. The insulator cracks allowing a compression leakage.

Sod changing them for the fun of it, just keep the gap adjusted
correctly and if you feel inclined keep a spare handy to cover the
failures.


Yes, changing plugs for fun. Says it all.

--
Phil KyleT

T
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g r s g

That's a spot on assessment in my view. Regular changing of spark plugs
benefits only one category of person - those who make them if you need
explanation.

In 40 odd years of motoring I have only had to change a few plugs for really
identifiable reasons i.e. the electrode was starting to disappear into the
insulator through erosion and part of the insulator cracking off and
detaching itself causing a misfire.

Bomber Command used to have a "spark plug " crew attached to every squadron,
whose duty was to clean, gap, test and stuff 'em back into the aircraft. I
think you'll agree that was a fairly critical application?

As for the copper tip/ iridium tip BS, that's just marketing crap of the
highest order and deserves consigning to the same category as those
misinformed persons who think that paying £30 for a can of oil for their
pride and joy will make it last forever, or even make it last ANY longer.
Someday the connection between "longlife" oils and the appearance of "engine
sludging" problems may be made in the minds of the hard of thinking.

Snakey