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TR6 Cylinder Head Stud Question

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SherpaPilot

SherpaPilot

Jedi Hopeful
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Greetings,

I am having my cylinder head overhauled on my 72 TR6. According to the Haynes Manual, the last two studs for the head are slightly longer than the others. (12.5 cm vs. 12 cm). Does anyone know the reason for this added length on the last two studs? My newly purchased ARP studs are all the same length (12 cm.). Am I looking for trouble by installing these performance studs? Also, the original studs call for torque values of 65.5 ft./lbs. and the ARP stud kit wants the torque to be 80 ft./lbs. Do I risk cracking the head with these upgraded studs???? Thanks for any advice or experience you can offer.

Don

DSC_0045.jpg
 
DNK

DNK

Great Pumpkin
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Don, IT was ions ago that I built my old 6.
Don't worry about the stud length. It's fine.
On the torque value, I installed them in my V8 in the Wedge and those are called out to be torqued at about 76lbs.
The ARP ones say 100. It freaked me out too.
I even called them .
The ARP studs stretch a lot so they need that.
Go with what they say
 
OP
SherpaPilot

SherpaPilot

Jedi Hopeful
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Thanks for the response. I'll move forward on this project with the ARP studs and go with their recommended torque setting. I'll be glad to get this car back on the road.
 
DNK

DNK

Great Pumpkin
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I looked on the ARP site and don't even see the 6 listed anymore
 
R

Richter12x2

Jedi Hopeful
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I actually know this, but can't remember where I saw it - they're supposedly longer to account for installation of a lifting eye, even on the GT6 which has very nice lifting eyes on the front and back of the block. Mine were not in the correct order, but they're not long enough to interfere with anything else, so I'm not too concerned about it.
 
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