What size tap should I use to clean the head bolt hole for a B16A? I ran a 12x1.5 and now Im not so sure that it was the correct size. The bolt still fits snug if I thread it into the block though.

 

i do belive 12 X 1.5 is correct, but let someone else back me up.. and then your 100%.

 

^_^

 

Seeing as the threads are 11mm by 1.5 I bet you had some resistance when cleaning the threads, now all you need is a custom set of head bolts or studs made.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">Seeing as the threads are 11mm by 1.5 I bet you had some resistance when cleaning the threads, now all you need is a custom set of head bolts or studs made.</TD></TR></TABLE>
Damn. So I used the wrong tap size then hu? This sux. I already purchased some ARP head studs. And I only ran the tap through one of the threads. I guess I will be heli coiling it then. Thanks for the responce.

 

Good news is you only did one, get it Timeserted instead of heli-coil, as they are not long enough.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">Good news is you only did one, get it Timeserted instead of heli-coil, as they are not long enough. </TD></TR></TABLE>

Well Ive been doing some searching and supposedly they make longer Helicoils that will cover the whole thread of the bolt. Hopefully I can find them. Thanks.