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How to install new pulleys?

This is a discussion on How to install new pulleys? within the External Engine forums, part of the LSx Technical Help Section category; How to install new pulleys? i have the tool to take off the old crank pulley but what does the ...

  1. #1
    Junior Member
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    Aug 2006
    no where

    How to install new pulleys?

    How to install new pulleys?

    i have the tool to take off the old crank pulley but what does the new bolt have to be torqued to and what do i use to do that ?

  2. #2
    Member 89LX's Avatar
    Join Date
    May 2006
    East Coast North Carolina

    2000 Z28 M6

    UD Install Instructions

    I used these as basic instructions for my SLP UD install. Hope it gives you a basic idea.
    Tool Required:
    From Left to Right:

    -24" Piece of pipe (for use w/ Breaker-bar)
    -18" 1/2" Breaker-bar, 15/16 socket (1/2"), 15mm Socket (3/8")
    -3/8" Socket wrench
    -Torque wrench (Capable of 250 Ft. Lbs)
    -3 arm pulley Puller

    STEP 1: Remove the serpentine belts (2 of them).
    Using the 15mm socket, remove tension from the belts. To do this, simply apply pressure to the wrench in a downward/Clockwise position. The "Belt tensioner" pulley will rotate downward and remove tension. Just pull the belt off. This method works for both belts.

    STEP 2: Loosen Crank pulley Bolt
    If you have a M-6, put it in 5th gear. This will prevent the crank from turning when breaking the crank bolt loose. Using the 18" Breaker-bar (along w/ the 24" Pipe...if necessary) loosen (DO NOT fully remove) the Crank pulley bolt. You want to leave the bolt still threaded just slightly. The bolt will provide the "base" on which the pulley puller will rest on.

    STEP 3: Remove Pulley
    Attach pulley puller (Part# 2768RT) to the INSIDE hub of the pulley. DO NOT USE THE OUTSIDE DIAMETER...YOU WILL DAMAGE THE PULLEY. Notice the red arrow points to the Crank bolt still in place (although almost completely backed out). After the pulley is attached, begin tightening the it tightens, the Pulley will begin to inch it's way off the crank snout. Unfortunately the Crank bolt isn't long enough to allow the pulley-puller to fully separate the Crank Pulley from the snout. To completely separate it, we had to use a small pry bar. (If you do this...BE GENTLE! You do not want to damage the crank.) After a few gentle pry's at various points around the pulley, it fell off into my hands

    STEP 4: Install Under drive Pulley
    Lubricate and mount the ASP pulley onto the snout. You should be able to press it on just far enough to allow the STOCK crank bolt to begin threading. Once it is threaded, tighten it to 240 ft. lbs. or until it is completely seated on the crank snout. Afterwards, REMOVE THE STOCK BOLT and replace it with the NEW CRANK BOLT. You will tighten the NEW bolt to 37 ft. lbs. and then turn it an additional 120 degrees.

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