If you do not have the 7mm bolt tight on top of the coil yes it will get into it. You dont have to saturate that area. I have never had it happen to me and I wash mine about twice amonth.
I don't spray my engine bay anymore. I did it for about three months and then one of my coil packs went back. Cost me $200 buck to find out which one and then get it replaced. A lot of people us a leaf blower and just wipe the engine down. No direct spray on the engine. I guess you could use plastic to cover the coil packs. Just my 02
I doubt that is why the pack went out. IMO
Ive been spraying mine for about 3 and a half years now and I am still on the orig coil packs. I do it about once to twice a month. Everytime I wash the truck.
Simple green full strength keeping it wet for about five minutes, Rinse with a hose, while wet Armour all. Wait a few minutes and use a leaf blower, Towel dry Billet and chrome.
that was the product i was thinking about, thanks. don't know why i thought it was a spray. do you think this will hold up to the heat that a supercharger is exposed to? i've got a polished eaton i'll be installing soon and thought this would save some time and labor later on.
if it's really dirty, i use simple green and hose it off. then i use the air compressor to dry everything. then i will go back with a sock & adams vrt on all the rubber & plastic parts.