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Please understand I am only commenting about the ceramic in a Autolite Spark Plug. All plug manufacturers have differing ceramic technology and integrity.
Mechanical integrity-no degradation would occur at all pretty much regardless of environment. To quote our ceramics engineer- " you could bury one of our plugs and dig it up 200 years later and perform mechanical testing on it, and it would pass all tests with flying colors"
Dialectric Integrity- Same thing, there is simply no degradation not only over the life of the plug, actually much longer than that.
Now, that being said, there are issues that can have an effect on ceramic degradation or integrity. If the spark plug gap wears to the point that it requires near maximum coil output to fire consistently, electricity likes to find the easiest path to ground. A coil firing in this manner will spend plenty of time trying to punch through the ceramic.
Another issue is when you have an engine running less than optimal air fuel ratios (rich), the plug can become fouled with carbon tracks that do conduct electricity and will cause the spark plug to either not fire or misfire.
Let me know if this answers your question or you are seeking something more specific.
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Insulating material used in spark plug is?
Ceramic
Is it bad if the ceramic top of a spark plug is broken?
Yes. that plug will need replaced.
What material is use for the insulating body of a spark plug?
Aluminum oxide Ceramic
Which part of a spark plug is make of corn?
The insulators which are made of ceramic uses corn in the production of said ceramic. Amazing
How do you put a spark plug in?
you get a spark plug socket or one of similar size to fit the spark plugs, then you just put it in the correct location and screw it in snuggly(not too tight cause you will break the ceramic casing), then connect all the spark plug wires
What is the spark plug gap for a 1991 Force 50 hp?
There is no gap. The right plug is flat, with electrode in the center of a ceramic circle.
What is the name of that rubber thing under ignition coil and around ceramic part of spark plug in Grand Vitara V6?
The spark plug boot? yeah sum say coil wire , but its actually the coil to spark plug boot. KongKit
Remove a rock stuck next to your spark plug?
Buy a cheap ice pick. Using a vise or good pliers, bend it at the end at a 90 degree angle or so to make a hook. It should be strong enough to get the rock out. Otherwise pull the spark plug boot off, break the ceramic plug part, remove all broken fragments of rock and ceramic, then unscrew the rest of the broken plug and install a new plug.
What insulators are used for spark plugs?
Mostly spark plug insulators are made from a substance known as sintered alumina,which is a very hard ceramic material with a high dielectric strength.
Why would you have a line buned in the ceramic of a spark plug on a 99 tracker?
those were probably the original spark plugs that came with the tracker when it was first off the line.....you are lucky your car is still alive.
How do you remove a broken spark plug from Dodge Grand Caravan?
With great difficulty. If you can get the ceramic part out of the plug, you need an easy-out and a torch. Heat the plug with the torch, then use the easy out to get the plug out. If that doesn't work, you'll have to pull the head and take it to a machinist.
How do you remove a spark plug when the wire came out the spark plug?
If you mean that the wire came out of the boot, then pull the boot off of the spark plug and use a spark plug socket to remove the spark plug.
