| Re: [GMCnet] might as well change spark plugs [message #345650] |
Tue, 23 July 2019 18:05 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Unless you like to replace electronic components, do not gap ANY spark plug
at .080". .040 is way better. .045, is ok, but absolutely NO LARGER.
Jim Hupy
On Tue, Jul 23, 2019, 4:00 PM Ek Lektro via Gmclist
wrote:
> i’ve got some Bosch Platinums that look kinda burnt, last changed about 8
> yrs (20,000) miles ago.
> The burn might be because the distributor was gummed up, running too
> advanced (and for who knows how long).
> ((Sure, maybe these plugs could clean up OK, but a few of them look a bit
> borderline, with the tips looking a little pitted.
> Anyway, I’m changing the cap/rotor and wires today, so why skimp on the
> plugs?))
> The GMCMI parts digest lists a bunch of compatible plugs with .080 gap
> (for the ’76 455 engine).
> So... should i buy a set of these and gap them at .045? .060?
> or should i buy different plugs that are already gapped at .045?
> Not sure if it makes a big difference, so any info appreciated, thanks!
> Greg / SolarSonic / Los Angeles
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