jvog

I looked down one of my spark plug holes and noticed a chunk missing out of it..it didnt seem to effect the spark plug going in and out at all and i really dont see any way to fix it. what do you guys think about this.

99mustanggt

Doesnt look like to big of a problem,the part where the spark plug seats looks to be intact (the shiny ring). Kinda interesting how that would happen though

jvog

yea the threads arent damaged..it was like that when the stock plug was still in it so it wasnt from me

WhiteFoxGT

Probably a mistake during milling/casting

I got a brand new Cobra motor from Ford for my car last year, got it all in and buttoned up, fired it up and it had an oil leak in the #2 spark plug bore. Had a pin-hole about 1/2 way down the bore that was just squirting oil out.

jvog

well thank god no oil in my spark plug holes lol...however my passenger pcv is leaking some oil but whatever

jivepepper

It looks like part of taper where it seats is missing it might not want to seal as well. What did the plug out of that hole look like? I'm it's probably fine.

jvog

plug looked fine like all the rest