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Discussion Starter #1
Anyone ever had an ARP stud break? Not in a running situation, but during building a motor? Ive got a broken ARP 2k head stud Im dealing with on a buddys motor I was putting togeather.
 

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Snail Powered
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^^^yep, he had to go back to the machine shop with it cause there was nothing that would get it out. how much were you torquing on it when it broke?
 

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Now I'm convinced ARP has a bad batch of stuff out there not heat treated properly.
I assume the same, as I have torqued my heads down to 120 ft lbs twice on the same studs and never had a failure.

They only say go to 90 ft lbs but the only way I'd do 90 is on an aluminum block where I'd worry about the threads pulling out.
 

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Discussion Starter #8
I was a hair over 100; the motor in my truck has been 110 several times now. Which the ones in my motor some of the very first ARP 2ks that dont even have an allen in the top of them.

We should get one of the big diesel stud producers to make us some; in the diesel world arps are the entry level "junk" studs.
 

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[smilie=uh Seems like an awful lot of instances for me. Usually when hardened bolts/studs get over torqued its the threads that give out.
 

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I know i just watched a show a few weeks back on the powerblock on spike, i wanna say it was horsepower or trucks, that did a test on ARP bolts and how, when torqued, showed there load on a PSI gauge. They used a bunch of different lubes on them ( engine oil, ARP molylube, peanut butter, etc ) and did multiple torques to the same spec ( 110ft/lbs IIRC), same Wrench and had different results with the load applied to them every time they torqued it, but with one of them, and i cant remember it. Ill try and see if i can find it..
 

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Discussion Starter #14
I used ARP moly.

I ordered a replacement stud today from ARP and talked with them on the phone. About the onlything I got out of them was "they have never heard of any studs just breaking" and send it back for us to test and if we find a problem with it we will replace that stud. What a joke.....it broke! There is a clear problem with it. I just ordered one; I dont see any sense in paying to send this one back to maybe get it replaced and having to wait on them to make their decision.
 

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On the ford diesel sites its either H11 studs or the ARP studs.... nobody i have seen in there has said arp is "junk" Although we do have bigger studs in our diesel engines.
BTW i went with arp in that build and they were fine.... same in the L actually, no problems
 

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Okay...your gonna need a paper clip, a bandaid and a 400 amp arc welder.....

Never mind, I'll send a PM :shitstormretarded
 

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I used ARP moly.

I ordered a replacement stud today from ARP and talked with them on the phone. About the onlything I got out of them was "they have never heard of any studs just breaking" and send it back for us to test and if we find a problem with it we will replace that stud. What a joke.....it broke! There is a clear problem with it. I just ordered one; I dont see any sense in paying to send this one back to maybe get it replaced and having to wait on them to make their decision.
What a bunch of dickheads
Find out the rockwell scale and range and send it to me. I've got a tester. I'd love to know where it's at. Most likely to hard. I'll even pay the shipping.
 

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I broke one as well during assembly. It was on the last pass of torque check and binggggg there it went. Of course it broke off below the block right at the start of the lower threads. Words cannot describe my feelings at that moment.

I talked with ARP they said send it to us and we will give you a new ONE. I said what, one of the set broke so you are just going to replace that one? How about a whole new set, nope just one.

I went out and laid down the cash for a arp 2000 set and had to pay a call out bolt specialist to get the old one out. All my easy outs and reverse drills etc wouldn't do it because it was so deep. When he got it loose it popped with less than 20# of torque.

Yes I have installed head studs many times before, I used the arp moly lube and followed their every instruction. I would swear they have mass produced these later batches and the quality control seems to be out the window.

It didn't bother me so much that it broke during assembly, what bothers me is it, or one the others could have given up while driving..

Rant off...............
 
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