Cylinder head bolts
Cylinder head bolts
(OP)
Hi
I'm searching for cylinder head bolts with the following spec:
M12
10.9 grade
1.5mm thread.
shank length of 90mm
The oem can no longer supply! any ideas? I haven't had any luck with any other suppliers.
Also if I were to change over to use studs how should I torque them as the orginals were stetch type and studs are not?
Thanks all.
I'm searching for cylinder head bolts with the following spec:
M12
10.9 grade
1.5mm thread.
shank length of 90mm
The oem can no longer supply! any ideas? I haven't had any luck with any other suppliers.
Also if I were to change over to use studs how should I torque them as the orginals were stetch type and studs are not?
Thanks all.





RE: Cylinder head bolts
do a search on GOOGLE for ARP
ARP makes probably the best fasterners hardware in all forms of racing, i'm sure they would or could make up bolts for your app ?
Larry Meaux (meauxracing@mindspring.com)
Meaux Racing Heads
MaxRace Software
ET_Analyst for DragRacers
http://www.mindspring.com/~meauxracing/
RE: Cylinder head bolts
But, you shouldn't have too much trouble finding a bolt that will work. M12x1.5 is a standard thread, 10.9 isn't an extremely high strength, and 90mm isn't that long for the size. Call brafasco, and other fastener suppliers, you shouldn't hev too much trouble finding them.
Try finding an M11 130mm long in a 13.9!! It wasn't possible, and i ended up with the ARP studs.
RE: Cylinder head bolts
I've had no joy finding bolts but studs could be the way to go, i'll give the companys you suggest a call on Monday.
Any Ideas on the second question?
What do I torque the studs to? is the torque purly from the fixings point of view I.E TTY on the stretch bolt or from the point of view of the loading on the object that is being fixed?
Cheers
DaveE
RE: Cylinder head bolts
Try--- www.boltscience.com
www.futek.com/boltcalc.asp
Rod