Which way is correct?
Dumb question, but here goes.....I'm installing spark plugs (AC Delco R45S) and I went to put the gasket onto the plug and noticed that one side of the gasket is larger than the other. Before I torque these down, which side of the gasket seals against the head? The plugs that came out were Champions and the gasket was the same on both sides, although one side seemed a little thicker than the other, so it was no help.
Thanks.
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