304 V8 Harmonic Balancer Installation

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by 74CJ5 Renegade, Oct 29, 2016.

  1. Oct 29, 2016
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    I have a new harmonic balancer by Professional Products. I am doing the install with a harmonic balancer installation tool. I get about 90% of the way there and then it stops. It looks like I am abt 1/8 to a 1/4 inch out. Do I pull the balancer and hone it or get another guy and use more force?? If I should hone it out what do you use to do it?

    I checked my old balancer. On the outside of the shaft that goes against front main seal there is blue paint from when the engine was painted on that shaft abt 1/4 inch out where I would have thought would have been in under that seal......???

    Thanks in advance!!!
     
  2. Oct 30, 2016
    nickmil

    nickmil Super Moderator Staff Member Sponsor

    Happy Valley, OR
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    Are you saying about 1/8" to 1/4" of the seal surface is still showing? If so that is pretty normal on most engines. Or are you using something else as your gauge? A little vague and confusing as to what you are describing.
     
  3. Oct 30, 2016
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    You need to measure and see if it seats at the same depth as your old balancer. Compare the new and the old balancer, and see if they are the same.When the pulley is installed, the belt grooves should align with the other pulleys like they did before.

    As I recall, you don't need any kind of installer for the balancer. You'll need a puller to remove it, but the crank center bolt is enough to seat it when installing. It has a torque spec as I recall: 90 ft-lb according to the '82 TSM - no need to guess.
     
  4. Oct 30, 2016
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    Tim.. If it does not go 'all the way on' would there be any concern about an oil leak at be seal?

    Oh the manual says take a hammer and tap it on.... The installer makes it much easier!!!
     
  5. Oct 30, 2016
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    I think if it does not go all the way on, you will have bigger problems than an oil leak. As Nick writes, the polished surface typically extends beyond the seal some. That won't make any difference in sealing. Did you torque the crank bolt? I'd put the pulley on, and see if the grooves line up with the other pulleys.
     
  6. Oct 31, 2016
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    1/8 to 1/4 of an inch of the shaft of the harmonic balancer that goes onto the crank shaft which I would think would go right into where the seal is... I am trying to figure out if the back of the h balancer needs to but up against the timing cover / main seal or not... Thank you for te help!!!
     
  7. Oct 31, 2016
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    Tim.. I did not crank the torque bolt. I have but a lot of force on the balancer installer and it just seems to stop.
     
  8. Oct 31, 2016
    sterlclan

    sterlclan Member Sponsor

    exploring the...
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    the balancer wont hit the case,there should be a little machined surface showing. check the belts for proper alignment
     
  9. Nov 17, 2016
    CJ5Jeeper

    CJ5Jeeper Teacher Jeeper

    Apple Valley, CA
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    I must be misreading your post, because I know you're a pro, but the crank center bolt should never, ever be used to pull on the balancer. It is quite possible to damage the threads inside of the crankshaft if the crank center bolt is used to thread or pull on the balancer; though I know that many people use this ill-advised method. I'm surprised the OP was able to find an installation tool, as my local auto parts did not carry one that would fit my crank. My Professional Products balancer was quite snug when I recently installed it. Therefore I made my own tool out of a long grade 8 bolt which was threaded all the way and a thick steel plate. As far as the original post is concerned, I would not hone out a brand new balancer. It may just be tight; mine was so tight that the grade 8 bolt threads on my homemade installation tool were ruined when I was done installing the balancer. This is better than ruining the threads inside my crank. On the other hand, if you feel it stopping, there must be a reason why. Is the area around the keyway all clean?
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  10. Aug 10, 2017
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    I have removed the new balancer and I want to check the length of the section that goes into the timing cover housing. I really think it is too long and bottoming out when I install it.

    Unfortunately tossed my old balancer (I wish I hadn't!!). Does anyone have one handy they can measure for me?

    I need the length of the balancer on the engine side that has been machined down. So the narrower part. Does that make sense? My bet is that mine is about 1/4 of an inch too long.

    Thanks for the help!!!
     
    Last edited: Aug 10, 2017
  11. Aug 12, 2017
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor

    cordele, Ga.
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    Why don't you just do as requested and install balancer and torque to spec. If balancer pully groove aligns with the other pully grooves then you are good to go. As long as the seal is on the machined/polished part of the balancer then it will not leak. The polished surface is not tapered.
     
  12. Aug 12, 2017
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    It has been torqued to spec.... unfortunately, the pulleys still don't line up.

    What I need now is the length of the side of the balancer on the engine side. If mine is too long I will call Professional Products and have a conversation.

    Thank you for the help.
     
  13. Aug 16, 2017 at 4:53 PM
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    Anyone have one handy they can measure???

    Thanks for the help!
     
  14. Aug 16, 2017 at 6:49 PM
    Dauntless1971

    Dauntless1971 Member

    Bend, OR
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    As best as I can tell, I measure 7/8 of an inch from the inside of the balancer to the outside of the timing cover.
     
  15. Aug 18, 2017 at 1:40 PM
    74CJ5 Renegade

    74CJ5 Renegade Member

    Houston, TX
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    Thank you for the response and the help!

    The length I am trying to determine is the part of the balancer that goes into the hole in the timing chain cover. The part that has been machined down.

    I need to see if the one I have is too long and then I can see what professional Products can due for me of the one I have is defective. So I would need someone who has a balancer uninstalled and lying around to give me the measurement from theirs.

    If it is the same as mine then it gets more confusing and I need to figure out what the issue is.
     

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