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GoodGuy77

Are spark plug boots optional on 07 MKZ?

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Hi all,

Wanted to ask you guys something. I have got a 2007 MKZ, and recently had to replace spark plugs, as mine were there for over 15K miles. Anyways, when doing the job I noticed the small plastic or hard rubber things there, one for each plug. There is written resistance in Ohms... but it's plstic. And they are so ugly already.... I googled to check what was that, and it's spark plug boots. I am wondering if these are crucial to ignition? What if I just remove them and just put plugs as is?

For now I kept the boots there, but think whether I may remove them or replace with new one perhaps (https://www.carid.com/spark-plug-boots/)?

Edited by GoodGuy77

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Did you leave off a digit?  There'd be no reason to change plugs with 15K miles on them.

 

WRT the boots.  Yes.  Leave them there. The factory wouldn't put them there for no reason.  The mere fact that the resistance is printed on them should tell you something.  They prevent spark arcing.  If you don't like the way they look, just buy new ones.

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Hi man, yesterday read on these 'boots' and they are there crucial, as you told. B/c without them, as I read yesterday, the plugs may a) overheat, b) fail and hence may be misfiring.

So I decided to keep them at place, the factory ones, as long as they do their job.

Just was not sure whether these are critical to have or replace within some time... Apparently no replacement's needed as long as they work.

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