Anti seize help when installing them? I have a new one so if that does help I can remove the plugs, apply anti seize and reinstall.

 

It was OEM when I changed it. It broke putting the new one in because they are very easy to over tighten and snap even when you do not think you are over tightening. I did use never seize on the new plug. Always a good idea IMHO. Little goes a long way.


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This could get into one of those "i've done it forever without an issue" thread
Until something breaks
I never use anti seize and that's a possibility why you broke a plug.
It gives a false torque reading and you end up over torqueing
It also acts as an insulator and could give a poor ground.
It's also an aluminum head and no need for any kind of corrosion inhibitor or anti seize

Oddly I was not using anti seize on the one I broke but I DEF over torqued. 100% my fault. Was going by feel. I DID use anti seize on the second plug but you do raise very good points I’ve never considered in using the additive. Thanks!


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To each their own. However, the service manual for my RZR states "Apply anti-seize compound to the spark plug threads." I suspect it has to do with the steel threads on the plug and the aluminum head. Also anti-seize has aluminum, copper, or other metal in the compound so the insulating properties are likely nil. Several major automobile manufacturers also recommend anti-seize on the plug threads. There's a reason for it.

It's your choice.

 

My manual doesn't say anything about using anti seize

Also comparing an automotive application is apples to oranges.

Some use cast iron cylinder heads.

There are some bolt torques where the manual specifically says not to use any type of oil or anti seize

My manual mentions nothing but I usually use my own judgment. Sometimes vehicle maintenance can be like religion. LOL Not everyone agrees and for every way I do it that works someone else has done it that way and broke stuff - and vice versa.

Personally I’d rather have a little assistance on those threads to ease future removal ESPECIALLY knowing how easy it can break. Even the manuals 7.5 ft lbs makes me a little cringy.


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I suppose the proper answer would be to do what is recommended in the factory service manual for your particular model.

 

Good quality spark plug have an electroplated coating on the metal part of the plug to prevent seizing/galling due to dissimilar metals. Honestly I wouldnt put anything on the threads. I would spend money buying a good spark plug socket and make sure the plug threads start right and dont get cross threaded. Be careful working on these engines.

 

I don’t have My Factory Service Manual in front of Me right now but that plug is smaller diameter threads than most automotive stuff & torque is relatively low ( I think something like 7 to 9 ft. lb,) I use a Torque Wrench On Mine & all Automotive Plugs I have changed thousands of Auto/Light Truck Spark Plugs & Never came across any factory installed spark plugs with anti seize on them.


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should've named this, "I tightened my spark plug too tight and broke it". has nothing to do with the part or design of spark plug when you over tighten it

 

Sure should. And I wanted other shed mechanics aware so they won’t experience what I did or worse.


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