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Source for head studs 251 C.I. engine


 
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Dodgeit
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PostPosted: Sat Nov 03, 2012 4:31 pm    Post subject: Source for head studs 251 C.I. engine Reply to specific post Reply with quote

Need new head studs, I suppose. Valves are in bad shape as far as angles go. They've opened and closed so many times, they have given themselves a reverse angle valve job.

Something besides OEM work? They are the A8500 LP heads.
 
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John Saeli
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PostPosted: Sat Nov 03, 2012 4:44 pm    Post subject: Re: Source for head studs 251 C.I. engine Reply to specific post Reply with quote

I replace studs with bolts whenever I can. A head held with bolts is much easier to remove when the time comes. CASE switched to bolts shortly after 1960.
 
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Dodgeit
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PostPosted: Sat Nov 03, 2012 5:10 pm    Post subject: Re: Source for head studs 251 C.I. engine Reply to specific post Reply with quote


Hey John, I called earlier and talked to your wife about valve availability and price, from the OEM. Any alternatives to OEM?
 
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dboll
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PostPosted: Sat Nov 03, 2012 6:19 pm    Post subject: Re: Source for head studs 251 C.I. engine Reply to specific post Reply with quote

without looking it up is the torqe spec differen't between a fine thread stud nut to a coarse bolt torque? It should be.
 
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Dodgeit
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PostPosted: Sat Nov 03, 2012 6:47 pm    Post subject: Re: Source for head studs 251 C.I. engine Reply to specific post Reply with quote

dboll wrote:
(quoted from post at 21:19:45 11/03/12) without looking it up is the torqe spec differen't between a fine thread stud nut to a coarse bolt torque? It should be.


I'm pretty sure your right
 
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EliG
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PostPosted: Sat Nov 03, 2012 6:50 pm    Post subject: Re: Source for head studs 251 C.I. engine Reply to specific post Reply with quote

Head studs are still available from Case. Original part number is O9756AB which subs to CAS A21058. They were $20.13 each. I'm glad I only needed one when I rebuilt my 251.

Good luck!
 
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John Saeli
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PostPosted: Sun Nov 04, 2012 10:27 am    Post subject: Re: Source for head studs 251 C.I. engine Reply to specific post Reply with quote

Doug: Good question. CASE Service Manual says "Bolts are 9/16 NF Grade 8, 145 - 150 Torque. But I never saw a NF CASE Head Bolt. The manual was printed in the 60's.
 
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