it was running fine did everything by the book driver even said it was running great until they heard a pop and back it came
we got the head from a machine shop the first one i believe was a reman and this second one was supposed to be new
second time
These are from this second time
this was after the first replacement sorry its the only photo i have to show
So have done now three rebuilds on a Detroit 60 12.7 and have never had this happen before. The new heads we keep getting its like the valve head...