About the head bolts on the A15(with A14 H72 head). The smaller diameter head bolt which goes in the center is smaller in diameter on its body(lenght)...but the thread is the same as the rest of the bolts, right? or else I messed up, because I cleaned all the threads in the block with the tap # 10 X 1.50
I think the threads are and must be the same, otherwise this bolt would not torque the same as the rest, but I want to double check before final assembly. I can not find any info on the exact size for the bolts, not even the dealer knows.
Jaime.