1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

L134 Bell Housing Alignment

Discussion in 'Flat Fender Tech' started by garage gnome, Apr 18, 2020.

  1. Apr 18, 2020
    garage gnome

    garage gnome ECJ5 welder

    Western MA
    Joined:
    Jun 19, 2009
    Messages:
    3,083
    How does one check how aligned the bell housing is to the center of the crank? I remember a post about this not too long ago.

    I want to check it when I do my bell housing swap.
     
  2. Apr 18, 2020
    william_cj3b

    william_cj3b 3BOB driver

    Milton, FL
    Joined:
    Nov 17, 2003
    Messages:
    421
    Install your new bellhousing and torque to spec. Make sure the block, plate and bell mounting surfaces are clean. Thouroughly clean the index bore and cleanup any burrs with a stone. Mount a mag-base dial indicator on the flywheel with the indicator stem contacting the index. Watch the needle/readout on the indicator while rotating the crank. Stop at the lowest reading and 'zero' the gauge. Mark the low spot. Rotate the crank until you find the highest reading (expected 180 degrees from the low point). The reading, or difference from the low point is the amount of misalignment. An arrow drawn from the low point through the high point shows the direction the index bore needs to move.

    Also check the rear face of the housing. Reposition the indicator so that it contacts the rear face a reasonable distance from th e bore. Rotate the crank repeating the measurements above. This will indicate how square the mounting face is to the crankshaft centerline. If you find this measurement out of tolerance, remove the bell and inspect the bell, motor plate and block, especially at mountings near your highest measurements, for burrs or debris that might keep the bell from mounting cleanly to the engine.

    Correcting an out-of-square condition will also change the index relationship to crank centerline.
     
New Posts