Rocker Polylocks
Thread Starter
Drifting
Joined: Jul 2002
Posts: 1,254
Likes: 1
From: Edinburgh
Rocker Polylocks
This might seem a daft question, but what is the proper method of locking the Polylock Trunnions on the rockers, do you adjust with the nut and lock with the socket head cap screw or adjust with the cap screw and lock with the nut?
Thanks in advance
Thanks in advance
Last edited by Graemeinvette; Dec 17, 2007 at 06:17 AM. Reason: Spelling
Pro
Joined: Jun 2007
Posts: 688
Likes: 1
From: Stevens Point WI
I always back off lock then adjust as needed then hold nut with wrench and tighten down the lock.
Its been working fine for me and my roller setup, I also bought one of those starter triggers so you can bump over the motor without having to use the key
Its been working fine for me and my roller setup, I also bought one of those starter triggers so you can bump over the motor without having to use the key
Racer
Joined: Apr 2007
Posts: 361
Likes: 0
From: Sacramento (Citrus Heights) California
Graemeinvette, I do the same as Fonz69, backing off the lock and then doing the adjustment, holding and tightening the lock again.
I'm not sure about the market for tools for the SBC, but on the VW side of things they make a fantastic little adjuster tool that holds the lock while you turn the adjuster and makes the job about 2x easier (at least on the aircoolers but in my experience it's much easier on the chevys because everything's right there on top and the angles are a lot better.
Thread Starter
Drifting
Joined: Jul 2002
Posts: 1,254
Likes: 1
From: Edinburgh
Actually it was a bit of a daft question, call it a senior moment! When you think about it only the nut can exert pressure on the rocker so its obvious that you adjust with the nut and lock off with the cap screw, Dur!
I will go back to sleep now!
Thanks for the replies though.
I will go back to sleep now!Thanks for the replies though.
Drifting
Joined: Jun 2007
Posts: 1,478
Likes: 4
From: Formerly from the Great White North but now residing in the Desert Southwest NM (The Land of Dis-Enchantment?)
If you have hydraulic lifters, a technique that works real well is to turn the nuts down by hand until snug meaning there is some resistandce to turning the pushrod with your finger tips. Then you turn the set screw down to snug and, using the wrench, turn the nut the final half turn to preload the pushrod. The set screw will bite in when you do this and make everything tight and secure.
Melting Slicks
Joined: May 2002
Posts: 2,431
Likes: 52
From: Florida
look to the left on this page for red link "Valve Adjustment Made Simple"
It discusses Poly-Lock do's/dont's.
Jim
http://www.mountainperformanceonline.com/
It discusses Poly-Lock do's/dont's.
Jim
http://www.mountainperformanceonline.com/
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Intermediate
Joined: Dec 2007
Posts: 28
Likes: 0
Overtightening of the setscrew or tightening the adjuster after the setscrew is tight can cause a polylock failure or can break the rocker stud off just below the polylock. Using a Tee handle reduces the chance of overtightening for those of us that think that TOO tight is just right. 
