Do spark plugs have to be perfectly gapped?

Do Spark Plugs Always Have to Be Gapped? Not always. In the past, it was necessary to gap spark plugs, but today spark plugs are usually pre-gapped. It is advisable to double check that the gap is correctly set to the vehicle's recommended setting when installing spark plugs. via

Should I use anti-seize on NGK Spark Plugs?

Should You Put Anti-Seize On Spark Plugs? Just about every spark plug manufacturer will recommend against putting any lubrication on spark plugs. NGK spark plugs, AC Delco, Champion, Bosch, Denso, and more all say to avoid it. via

What does smaller spark plug gap do?

A smaller gap ensures the spark plug fires on each cycle. But if the spark gap is too small, there won't be enough room for the airfuel mixture between the ground electrode and center electrode. So when the spark plug fires, there's a possibility that nothing ignites. via

Is Vaseline a good dielectric grease?

On a comparison table, the dielectric grease is considered to be more superior than Vaseline when it comes to preserving connections. As such, petroleum jelly (or Vaseline) is weaker and would not last more than the dielectric grease when exposed to extreme temperatures. via

Where do you put dielectric grease on a spark plug? (video)

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