What heads studs? And final torque? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 32 (permalink) Old 02-01-2017, 02:46 AM Thread Starter
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What heads studs? And final torque?

I've read so many different things but most everything is from years ago what's the latest tread for clamping these heads down? I'm a very competent diesel mechanic and machinest, I've just had my heads completely redone, New valves, guides,springs, seals,keepers,injector cups, resurfaced and oringed, now all I need to know and decide on is which gaskets and studs to buy and what the final torque should be? 210 just doesn't sound like enough to do the job I'm not concerned about being able to reuse the studs I just want them to hold for 400,000 miles on a mild tune, btw the block is flat I personally checked it myself this is the first time the heads have been off the block hasn't been molested in anyway,no cookies or wire wheels have been used.
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post #2 of 32 (permalink) Old 02-01-2017, 02:55 AM
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Re: What heads studs? And final torque?

It's 210 ur right I would do it in three stages

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post #3 of 32 (permalink) Old 02-01-2017, 11:06 AM Thread Starter
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Re: What heads studs? And final torque?

I was thinking about going to 245 or 250 to take any stretch out of the studs I'm not concerned about being able to reuse them if I can get a ton of miles out of them I'll buy a new set if and when needed, will ARP's or A1 technologies 1722's torque to 245/250 without yielding? I might drop the cash and get the 625's idk, has anyone installed the new felpro gaskets? If so how many trouble free miles have you gotten out of them?
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post #4 of 32 (permalink) Old 02-01-2017, 11:58 AM
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Re: What heads studs? And final torque?

That is not a great idea in my opinion. Over torquing is never a good thing.

You can bet whoever engineered those fasteners set the torque where they did for a good reason. We'll never know exactly what the reasons were, but I wouldn't try and second guess it.

Also, if the head is over torqued, when it heats up, it'll crush the gasket. Then when it cools down a leak will form.

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post #5 of 32 (permalink) Old 02-01-2017, 12:16 PM
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Re: What heads studs? And final torque?

"I was thinking about going to 245 or 250 to take any stretch out of the stud"

They won't stretch. They are rated a 220,000 psi tensile strength

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post #6 of 32 (permalink) Old 02-01-2017, 12:23 PM
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Re: What heads studs? And final torque?

Quote:
Originally Posted by 7.3idiguy View Post
"I was thinking about going to 245 or 250 to take any stretch out of the stud"

They won't stretch. They are rated a 220,000 psi tensile strength

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Good point. Besides, over torquing wouldn't take stretch out of a fastener. It would be the other way around.

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post #7 of 32 (permalink) Old 02-01-2017, 12:37 PM
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Re: What heads studs? And final torque?

Charlie from kc turbos over torqued his and it snapped a few of the studs. I personally wouldn't do it. If your going for clamping force and you don't want head gasket issues I say get the heads oringed.

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post #8 of 32 (permalink) Old 02-01-2017, 04:13 PM Thread Starter
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Quote:
Originally Posted by Sbluke55 View Post
Charlie from kc turbos over torqued his and it snapped a few of the studs. I personally wouldn't do it. If your going for clamping force and you don't want head gasket issues I say get the heads oringed.
They're oringed.
So ARP's or A1 1722's?
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post #9 of 32 (permalink) Old 02-02-2017, 12:48 AM Thread Starter
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Re: What heads studs? And final torque?

Well I have pretty well made my mind up,I'm going to go with ARP'S torqued to 210 maybe 225 we'll see, and I'm going to go with the felpro head gaskets, I'm doing the work myself so if they blow atleast I'm not out a bunch of labor money, I had the cab off in a few hours fighting rusty bolts and all so the next time I should be able to pull it in half the time!! Lol oh btw the truck is a black 2005 F350 lariat, 4 door, 4x4, short bed,dully I'd post pics but I haven't figured this site out yet.
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post #10 of 32 (permalink) Old 02-02-2017, 05:13 PM
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Re: What heads studs? And final torque?

Has anyone ever gone back and re-torqued their studs after say 10,000mi or some set time? Is there a need to do that?
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