Preload Question, Why 22 Ft-Lbs
12-09-2004, 01:05 PM
#1
TECH Fanatic
Thread Starter
iTrader: (14)
Join Date: Dec 2003
Location: Salisbury,MD
Posts: 1,729
Likes: 0
Received 0 Likes
on
0 Posts
Preload Question, Why 22 Ft-Lbs I understand the process of preload but what I don't understand is why I have to hit the magic 22 ftpound in so many turns after 0 lash. Why couldn't I just reach zero lash and then go 1/16 to 1/8 turn past 0 lash in the case of camp Rs without veriffying that it happens at 22 ft-lbs?
12-09-2004, 01:20 PM
#3
TECH Fanatic
Join Date: Jan 2002
Location: harrisburg, pa
Posts: 1,205
Likes: 0
Received 0 Likes
on
0 Posts
what he said
you are comparing apples to oranges..
stock rockers are not adjustable...22ftlbs really has nothing to do with a zero lash although it is something past..
Comp Rs are adjustble..about 1/5 turn past zero lash cold..with comp r lifters.
you are comparing apples to oranges..
stock rockers are not adjustable...22ftlbs really has nothing to do with a zero lash although it is something past..
Comp Rs are adjustble..about 1/5 turn past zero lash cold..with comp r lifters.
12-09-2004, 06:14 PM
#5
On The Tree
Join Date: Sep 2004
Location: St. Clair
Posts: 143
Likes: 0
Received 0 Likes
on
0 Posts
Wow...1/5th of a turn past zero lash is all Comp recommends for preload...No wonder everyone says they make way more noise that stock lifters...
I Just did Crane Adjustables and they were 2 full turns (0.090") worth of preload after zero lash...
Peace...Gman
I Just did Crane Adjustables and they were 2 full turns (0.090") worth of preload after zero lash...
Peace...Gman
12-10-2004, 06:45 AM
#6
TECH Fanatic
Join Date: Jan 2002
Location: harrisburg, pa
Posts: 1,205
Likes: 0
Received 0 Likes
on
0 Posts
Comp recommends .008-.010" which is about 1/5 turn...no more noise than stock. They make more noise when they arent installed properly...soaked in oil, adjustable rockers with correct preload...
12-10-2004, 09:44 AM
#7
TECH Senior Member
1- preload is an action on the lifter not the rocker.
2- there are 2 kinds of rockers
a-adjustables and non-adjustables >>>(stock units are non-adj)
On non adjustable rockers its 22lbs/ft trq after 0 lash of the pushrod.(nothing to do with preload of lifter), lifter preload with non- adj can only be done by either custom length p-rods or shimming the rock assembly stands.
b- on adjustables, no shimming needed, and past 0 lash, the rocker bolt has to be tightened to manufacturer specs. This could be 1/4 or 1/5 turn past or so (this has to be done hot).
2- there are 2 kinds of rockers
a-adjustables and non-adjustables >>>(stock units are non-adj)
On non adjustable rockers its 22lbs/ft trq after 0 lash of the pushrod.(nothing to do with preload of lifter), lifter preload with non- adj can only be done by either custom length p-rods or shimming the rock assembly stands.
b- on adjustables, no shimming needed, and past 0 lash, the rocker bolt has to be tightened to manufacturer specs. This could be 1/4 or 1/5 turn past or so (this has to be done hot).
Last edited by PREDATOR-Z; 12-10-2004 at 12:36 PM.
