Reply to "Spark plug removal"

Stan Galat

Are you absolutely sure they're 13/16"? Many aftermarket heads use smaller (12 mm thread) spark plugs which use a smaller (18mm) socket.

The space between manifolds and spark plugs is usually very tight. If they are older 14 mm thread spark plugs, you may need to remove the manifolds or grind down a socket.

1/23/239:07 PM

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