Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Why is my replacement balancer bigger

Discussion in 'The Garage' started by pudd, Nov 5, 2005.

  1. pudd

    pudd Newbie

    Joined:
    Nov 5, 2005
    Posts:
    3
    Likes Received:
    0
    Location:
    Tennessee
    Why is my replacement harmonic balancer bigger than the original. Is this normal or is Auto Zone handing out the wrong parts again.
     
  2. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Depends on application . I just replaced one , and had to take off the factory timing tab , and use a new one to match the balancer .

    Look at replacements on summit or jegs , they list a couple sizes so you can match what you have .
     
  3. pudd

    pudd Newbie

    Joined:
    Nov 5, 2005
    Posts:
    3
    Likes Received:
    0
    Location:
    Tennessee
    It is on a 1989 350 throttle body injected engine the replacment balancer looks like it is the size used on the carbureted engine. Any idea?
     
  4. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Just measure your old one , and get a new one that size . Its not hard at all . Call a speed shop , or engine builder , or look online .

    Most parts stores are good for the stuff we need a lot , like spark plugs , bearings ,brakes etc . But I would not buy engine internals , carbs , balancers , or any stuff like that there .

    BTW , there are several sizes available I can rattle off , 6.25 , 6.75 , 7 ( not common ) , and 8 inch .

    And there is internal , and external balanced . Yours is the first type if its stock .
     
  5. sled_dog

    sled_dog 1 ton status

    Joined:
    Sep 3, 2002
    Posts:
    16,870
    Likes Received:
    0
    Location:
    Austin, TX
    we've been over it before, pretty certain all Single piece rear main motors are externally balanced. If thats correct, just replacing the balancer could be a bad choice. I mean it could run forever or vibrate like mad and wear out bearings in a week.
     
  6. gauder

    gauder Banned

    Joined:
    Aug 26, 2005
    Posts:
    1,613
    Likes Received:
    0
    Location:
    done
    One piece rear main motors only use a weight on the flywheel or flexplate.
     
  7. pudd

    pudd Newbie

    Joined:
    Nov 5, 2005
    Posts:
    3
    Likes Received:
    0
    Location:
    Tennessee
    The original balancer is a 6" and the replacement is a 8" they are both internally balanced. The 8" fits ok and does not affect the timing pointer. all is well. I was told as long as both balancers are internal balancers it will work.
     

Share This Page