Broken 12mm ARP headstud? - TDR Roundtable

Broken 12mm ARP headstud?

08-26-2008, 12:50 AM

#1 (permalink)

FordCummins

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Join Date: Apr 2005 Location: Decatur, IL Posts: 360

Broken 12mm ARP headstud?

While adjusting the valves on my truck, noticed that one of the "middle" length head studs, (between cylinders 1 and 2) was loose, grabbed it and pulled about 3-4" of stud out. Its been at least 20k since I last checked the valves so I have no idea how long it has been broken. Studs were installed roughly 60k miles ago, when I did the engine swap. Im hoping that I can drill it and use an easy out since I have plenty of room to work.

Anybody ever run across a broken head stud before? Truck only has a Super B turbo (S300) which rarely sees more than 40lbs of boost while playing around, and usually the max is 25 PSI or so when towing. Truck has never used a drop of coolant, and there is no mixing of coolant or oil so thats a plus. Studs were installed and torqued following the ARP instructions and advice from Scheid. They were only retorqued once after the initial hot/cold cycle.

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