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White sparkplug deposit

51jay

By 51jay,
in General Maintenance

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51jay Mentor

51jay

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I cant really tell  by the picture, but is it all over the grounding electrode or the ceramic tip?

Seems as if that cylinder is having a problem, perhaps running lean.

It looks like it would if it was burning a lot of oil but it's white instead of black. It's on the central ceramic, the tip only, of the central electrode and all over the other 4 electrodes ( Bosch super 4)

predator Grand Master

predator

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Posted

I thought you were being rhetorical there :) definitely lean condition, too much oxygen which will oxidise the tips of the plugs over time.

I have had it in a couple of cylinders before on plug removal. Replaced the plugs and checked a couple of months later and back to darkish normal. Some I think say that a few of the cylinders run slightly more lean than the others due to the intake manifold design. Although you are on a greddy now aren't you jay?

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