Originally Posted by 06RangerXLT
this is why you start the threads by hand.
And most importantly, if you pull the plugs out of a warm engine that has aluminum heads, don't reef on the ratchet when you're putting them back in. A light snug down is all.
Cold aluminum heads, medium snug down on the spark plugs.
On a cast iron head, don't get all fussy, just put them in and snug them down well.