Competition Best place to purchase 12mm Head Studs?

[zstroken]

We had a clearance issue, and ARP said they could be installed without the washers as long as the nuts are installed on a machined surface.

 

[OPoole]

I stock the ARP 12mm studs for 24v 247-4202 and 12v 247-4203 I hear there on back order?

 

[COMP461]

I would not go without the hardened washer, machining for clearance is the right way to achieve maximum clamping load. I also don't recommend this constant retorqueing either. Torque to the proper torque the first time, go thru one heat cycle and recheck torque. Then leave it alone, this loosen and retorqueing , was a crutch when people incorrectly installed o-rings and you would have to do this cycle several times to get the o-ring to seat in the fire ring of the gasket.

I've seen o-ring protrusion all over the map, as much as . 010 differences in the same hole. To be cut correctly, o-rings need to be done on a mill and not a BHJ tool. The BHJ tool is a great thing if protrusion tolerances are not important, as in a gas type racing engine where you have a receiver grove and a dead soft head gasket.

 

[Forrest Nearing]

We had a clearance issue, and ARP said they could be installed without the washers as long as the nuts are installed on a machined surface.

I wouldn't trust it... typical head cut isn't machined to the same surface texture as those washers are. it takes so little effort to clearance the valve covers, I wish they'd just continue to offer the old studs!

 

[COMP461]

the 12 valve is not on back order, the 24 valve is as of friday 27 sets , of which 21 are mine . but I keep a few sets in stock to help

 

[OPoole]

Cool i have 7 sets of 24v and 3 sets of 12v if needed!

 

[IC Smoke]

What is the McMaster Carr or Production Tool Supply, part number for a bottom tap on 24v studs??



THanks guys

Ian C

 

[OPoole]

you need a 12mm-1. 75