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Re: garages really bother doing this ?
I don't bother trying to correct a tiny error, especially if it is a
tiny systematic error on the wide side. But I do check. I've seen
enough that are off (always on the narrow side, as if they had gotten
bumped) to want to look.
I've also seen mass-market plugs that are consistent in gap but are a
LOT off -- they are sold for a broad range of applications rather than
a specific year and engine, and you are supposed to hand-gap them
before installation if the default doesn't happen to be what you need.
--Joe
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