If there is such a problem with the plastic on the coils cracking and ruining the coils; is there any way to prevent it?

 

Hi.

Well, other than treating them like the family jewels when removing them for a plug change, and not pressure washing them, or letting the heater hose drip coolant on them, not much .

Life for COPS under that hood is harsh; they age and eventually wear out - hot/cold cycles, heat soak after shutoff, high-voltage internal heating/stress/dielectric breakdown, etc.

Expect to change at least one during extended ownership, in general.

I'm trying to buy Neal's Granatelli's for spares but looks like he's not interested Wazzup with that, Neal? Instead of trashing them, you could recoup some of your investment. Help a fellow Canuck out.

Cheers
Grog

 

I was wondering if it were possible to coat them with clear silicone or something similar.
Any idea if that would help protect them?

 

NAPA sells the Coil-on-plug "COP" boots separately, it is common for the rubber to age and dry out, this will certainly cause carbon tracking down the plug and mis-fires. Replacing 8 coils would get a little pricey!?

 

I may try to put a thin film of clear silicon on the coils when I change plugs just to see if it would help keep the plastic from cracking etc.
Can you think of any adverse effects it would have if I did so?