Reuse ARP's???? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 21 (permalink) Old 04-17-2010, 05:18 AM Thread Starter
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Exclamation Reuse ARP's????

Before someone says it, I know there are threads about this already, but I have specific question. So here goes, I am getting ready to pull the cab for the second time to do the gaskets. Well the first time they were done, the mechanic torqued the studs to 260 ft. lbs. My question is, would it be safe to reuse the studs in my case and only torque them to the 250 ft. lbs. that ARP reccomends? Thank you for the help.

-French

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post #2 of 21 (permalink) Old 04-17-2010, 05:28 AM
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Re: Reuse ARP's????

Best I can remember. ARPs are torqued to 245. I believe they can be used 5 times. Seeings how they where torqued to 260, you may want to call ARP and see. Maybe someone else will chime in that knows a little more about it. I've never heard of the effects of torquing them past spec. Don't know if it would hurt them or not. I'm not an engineer, but I'm sure there's a formula as long as my leg to figure it out.

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post #3 of 21 (permalink) Old 04-17-2010, 05:38 AM
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Re: Reuse ARP's????

it shouldnt hurt but do you know why the gaskets went heads warped? hows the deck of the block. I'm runing arp and there tq to 280 cuz your not the first to blow gaskets with arps. i dono exactly but some one told me i was better off with them at 280 just becafull not to brake them.

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post #4 of 21 (permalink) Old 04-17-2010, 05:38 AM
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Re: Reuse ARP's????

Call ARP and get the maximum length on the stud. After install and use, they will stretch a bit. If they are in tolerance, use them. I've heard people say that they don't stretch... bull####.

Get a micrometer and take a look.

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post #5 of 21 (permalink) Old 04-17-2010, 05:49 AM Thread Starter
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Re: Reuse ARP's????

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Originally Posted by RMPowerstroke View Post
it shouldnt hurt but do you know why the gaskets went heads warped? hows the deck of the block. I'm runing arp and there tq to 280 cuz your not the first to blow gaskets with arps. i dono exactly but some one told me i was better off with them at 280 just becafull not to brake them.
I am actually suspecting a cracked head to be the culprit, but I'm not 100% sure either way. It will only leak when the engine is cold, but once everything heats up, it doesn't leak again until it has sat for a few hours. I have already bought different heads and have new gaskets sitting in my garage, so they are getting changed one way or another.

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post #6 of 21 (permalink) Old 04-17-2010, 06:02 AM
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Re: Reuse ARP's????

There should be a length that states the fatigued state.

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post #7 of 21 (permalink) Old 04-17-2010, 06:03 AM
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Re: Reuse ARP's????

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There should be a length that states the fatigued state.

Exactly.

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post #8 of 21 (permalink) Old 04-17-2010, 06:05 AM
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Re: Reuse ARP's????

I've seen ARP's reused many times and only ever seen one break I think. I wouldn't think twice about reusing yours. Just use lots of lube when you're retorquing them

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post #9 of 21 (permalink) Old 04-17-2010, 06:45 AM Thread Starter
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Re: Reuse ARP's????

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There should be a length that states the fatigued state.
Do you know what this length is by chance?

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Originally Posted by CanadianRedneck View Post
I've seen ARP's reused many times and only ever seen one break I think. I wouldn't think twice about reusing yours. Just use lots of lube when you're retorquing them
What lube would you reccomend? ARP's or another brand?

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post #10 of 21 (permalink) Old 04-17-2010, 06:58 AM
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Re: Reuse ARP's????

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Originally Posted by Countryboy07 View Post
Do you know what this length is by chance?


-French
Like I said, call ARP to verify the length and then mic it out. Better to get the info straight from the source.

I've mic'd my 7.3 ARP's that where used twice by me and they were in damn near brand new shape.

The H11's I just sold, were the same way.

I've used the ARP lube on H11's and ARP's. Just remember, don't YANK the torque wrench. Gently pull to the desired setting. More studs have been broken by incorrect installation than anything else.

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