Re: Henry's 37 Limousine

Posted by Cli55er On 2017/4/26 9:02:50

yes the threaded portion for 10mm is 1/4", but i can get 14mm in 3/8" reach. just 1/8" longer. and i can get them in platinum or whatever other more modern material I wish. maybe even Bosch platinum plus 4...never have to worry about gapping them again. have ran +4 in several cars and never had any issues. the newer ones will self clean much easier too as they will reach temps faster.

the only over the counter 10mm i can find is the autolite 3136. it is a hot plug. nothing wrong with that plug, just a basic copper core and i've had trouble with fouling, which people have argued over the smaller size contributing to that.

i'm not saying 10mm sucks or 14mm is better. my car has them now and i didn't think about drilling to 14mm on the old head. i just dont like that one hole is heli-coiled on this spare head and the cheapest most convenient solution is to drill and tap for 14mm. i can do that myself and it will be a good learning experience. if the head did not have a helicoil...i would leave it alone and just reuse my 10mm plugs.

regardless, there are pros/cons to either size, but i don't have any hate for 10mm. i'm just doing what i feel i need to do to get my car fixed.