Progress Thread finally tuning (and more)

[JD1964]

I'm just gonna toss this out there because I don't know how critical is is for aluminum heads but...

Those bolts are torque to yield and two different diameter bolts torqued to the same spec, are not even.

I understand. Albeit, the head is already cinched down entirely on its installation prior to all this. It’s not like I removed the stud and the corner of the head lifted. But there’s heat cycles to follow so who knows. If I cinch this down in the ballpark I think it will be fine. That’s with a prayer of course….

 

[JD1964]

By the way I don’t think this bolt I bought from the pull out drawer at the local hardware store is TTY.

 

[JD1964]

Gotta pull the header for assembly clearance either way so I’m working on that while I wait for special drill bit and tap. 27/64” bit and a 6” long 1/2x13 tap.

 

[JD1964]

The diameter of the washer surface on the bolt was about 1mm bigger than the machined surface on the head. I used a bench grinder to take a little off the bolt washer so it fits. Glad I measured it

 

[JD1964]

I'm looking to see if I can find a 1/2" stud. I could buy an entire kit but I bet with some searching I should be able to find a single comparable fastener.

Anyone think a 1/2" stud would be better than a bolt in this situation?

 

[JD1964]

Honestly, these kits are cheaper than I thought. I'll probably spring for one just to get a fastener I know was made for the job.

Ford 351W Windsor 12 Point Chromoly Cylinder Head Stud Kit

SpecsBrand:SpeedmasterPart Number:PCE279.1012Part Type:Cylinder Head FastenerFastener Style:StudHead Style:12-pointFastener Material:8740 chromolyFastener Finish:Black oxideWashers Included:YesCut to Fit:NoQuantity:Sold as a kit.DescriptionSpeedmaster cylinder head fasteners are made from...

www.speedmaster79.com

 

[JD1964]

Wait, someone just warned me about the Speed master quality

 

[JD1964]

I’m gonna splurge for an ARP 351 stud kit. If I ever pull the head I can always change to a time sert back to 7/16 then I’ll have a complete ARP 351 stud kit for sale. If it holds it holds.