4AG head bolts - crack crack

[Grega]

Was the debris from each hole sparkly with lots of metal bits?

no actually.
more like a brown dusty kinda stuff (and a wee bit of oil in one)

i asked the guy at the tool shop for a chaser and he didn't seem to know what i was on about....or didn't have them in stock.

i re-ran the m10x1.25 tap down the holes and it only wanted to "cut" when it got to the bottom of the hole. however in saying this, when i re-ran it again - it moved down the entire length of the thread very easily the 2nd time round. i'll jet some more carb cleaner down the holes and air comp it out me thinks again before putting the ARP studs in.

[nick.parker]

When undoing the head bolts on my 4AGZE (on two occassions) they all go CRACK when they initially move after proving the necessary torque to start undoing them. I'm always paranoid my 3/8" socket / extension are going to shatter in my face or something. I wear safety glasses!

Nick.