Rick's Free Auto Repair Advice

Posts Tagged: anti-seize on spark plug threads

Anti-seize on spark plug threads

Should you apply anti-seize on spark plug threads? No. Most spark plugs have either a zinc or nickel plating that prevents the threads from seizing in the cylinder head. That’s different from decades ago when spark plugs didn’t have any coating and could seize in the cylinder head, making removal tough. Do not add anti-seize to spark plug threads Adding anti-seize to spark plug threads actually lubricates the threads, causing you to over-tighten the spark plugs. Over-tightening causes the metal shell to distort and break the seal between the shell … Read More

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