can spark plug covers cause problems

[t16coupe]

heard from a friend that covering the plugs on high power cars etc can cause problems is this true or just a myth as i have a full plug cover on my car

 

[Fast Guy]

Not one I've heard before.
Not covering them can sometimes cause water ingress problems leading to misfires.

 

[skiddusmarkus]

Don't see how.If it was because they got too hot or the cover interfered with them electrically then the leads wouldn't be covered with rubber

 

[PobodY]

Me neither. - If it's electrical, then the problem is leads that are broken.
If it's that they're too hot, the cover won't make much difference given they're already sitting on the rocker cover.

As above; not having a plug cover can cause problems when water gets into the plug wells.

 

[Lynx]

He is probably thinking of COP which can have problems if there is too much heat.

 

[PobodY]

Ah! - I can see how that might be the case; one or more coil brakes-down and you loose the spark on that cylinder?
So, that's an SR20DET problem... if you've got an S14 Silvia, not a GTi-R.

 

[t16coupe]

i was told that it could cause a spark plug to burn out and melt a piston

 

[Fast Guy]

Well Nissan fit them as standard, so I doubt it.

 

[PobodY]

I just googled "1000bhp Skyline" and got this:

That looks like it's got a plug cover to me, and it's certainly high powered.

 

[Lynx]

i was told that it could cause a spark plug to burn out and melt a piston

Wat......?