rocker studs

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Apr 20, 2010 | 10:55 AM

sid318

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rocker studs

Hi guys anyone have had arp rocker studs snap, had 2 snap now engine not even done 10 miles yet, any ideas to problem other than faulty studs ? Kev UK.

Apr 20, 2010 | 03:08 PM

bashby

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From: Charles Town, W bygod Va

sounds like the rocker is binding up for some reason.

Apr 20, 2010 | 04:42 PM

1bad67sbf

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From: northern va

are your valve springs matched to your cam

Apr 20, 2010 | 04:59 PM

lew52

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I think you have another problem ARP studs won't fail in 10 miles , there very good ....Lew

Apr 20, 2010 | 05:12 PM

1bad67sbf

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From: northern va

where did they snap (flush with head or up at the rocker) i would have thought a push rod or rocker arm would break before a stud. i have been told to use 7/16 studs if i can from two machine shops due to them having repaired broken 3/8 studs many times on high performance sbf motors.

Apr 20, 2010 | 05:27 PM

Conanski

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Joined: Jun 2006

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From: Ottawa, Ontario

Makes me wonder.. are these real ARP studs or just cheap Chinese copies. I don't think you could break a real APR stud.. something else would give first like the rocker or the head itself. Where did you get these studs from anyway? Lets hope it wasn't Ebay.

Apr 22, 2010 | 12:08 AM

Beanscoot

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Joined: May 2007

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From: British Columbia

They could have broken due to not being tightened sufficiently. Check out the ARP website, it's very informative and they describe various kinds of failures (six as I recall).