[john walker's workshop]

3.2 heads are famous for wiped out valve seats. the guide gets worn, the valve wobbles around and beats the hell out of the seat. the seat is no longer round and that's why your readings are high. some of the 3.2 heads i've done are on their last valve grind, (probably just the first one for most of these) due to not enough seat remaining after they clean up. the stone assembly rides on a pilot in the new guide bore. a quick (2 seconds) buzz on the stone usually shows about 1/3 to 1/2 of the seat showing contact with the stone. shows you how much they are out of wack.