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Author Topic:   Polylock problems
Mpcoluv
Gearhead

Posts: 1144
From: Charlotte NC usa
Registered: Apr 2001

posted 03-21-2003 01:54 PM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
I have a set of the cheap Crane die cast rockers on my Cleveland. The crane supplied poly locks keep backing off.
Is there a fix for these things? Are the $50 ARP polylocks any better?
I am seriously considering going to the BBC stamped rockers with the tension nut.....Or maybe the Comp Magnum rockers.

[This message has been edited by Mpcoluv (edited 03-21-2003).]

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SteveLaRiviere
Administrator

Posts: 37258
From: Saco, Maine
Registered: May 99

posted 03-21-2003 02:06 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Are your studs long enough? Do you have at least 1.5 x stud diameter thread engagement? {On a 7/16" stud, that would be 0.656"}

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Mpcoluv
Gearhead

Posts: 1144
From: Charlotte NC usa
Registered: Apr 2001

posted 03-21-2003 03:02 PM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by SteveLaRiviere:
Are your studs long enough? Do you have at least 1.5 x stud diameter thread engagement? {On a 7/16" stud, that would be 0.656"}


Yes, I am running 2" long ARP 7/16 BBC studs.

[This message has been edited by Mpcoluv (edited 03-21-2003).]

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Hans olsson
Gearhead

Posts: 385
From: Sweden
Registered: Apr 2000

posted 03-21-2003 04:36 PM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
The ARP Perma-Loc are good.

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  • 71 Mach1 351c
  • E/SA 11.89-110 mph
  • F/SA 11.76-111 mph

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Dave_C
Gearhead

Posts: 788
From: Gadsden, Al
Registered: Aug 99

posted 03-22-2003 06:14 AM     Click Here to See the Profile for Dave_C   Click Here to Email Dave_C     Edit/Delete Message   Reply w/Quote
Check the bottom of the set screws inside the polylocks that you already have.

I have seen some that were not cut flat and square across the bottom. This surface must be flat where it seats against the ARP studs or it will loosen.

Later,
David Cole

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Moneymaker
Administrator

Posts: 21725
From: Lyons, IL, USA
Registered: May 99

posted 03-22-2003 12:29 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Hmmmm, I have never had a problem unless it was stud or length related.
Regardless of poly lock brand.

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Alex Denysenko
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