Harmonic Balancer Torque
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Northstar Engines and System Technical Discussion Discussion, Harmonic Balancer Torque in Cadillac Engine Technical Discussion; 93 Eldorado Touring Coupe N* I read many of the posts regarding the balancer replacement and was satisfied that the ...
  1. #1
    raymondk is offline Cadillac Owners Fanatic
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    Harmonic Balancer Torque

    93 Eldorado Touring Coupe N* I read many of the posts regarding the balancer replacement and was satisfied that the proper tightening proceedure was 37 FT-Lbs + 120 degrees. So I did that. Out of curiosity I looked in my FSM and it says 105 Ft-Lbs + 120 degrees. To get the 120 degrees took holding on with everything I had and pushing the wrench with my foot. Its all together now running over 50 miles. Do I need to go back and try for a few more degrees, loosen and retighten with the 105 FT-Lbs, or is it OK?

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    oldstuff is offline Cadillac Owners Fanatic
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    Re: Harmonic Balancer Torque

    The whole reason for the procedure is to clamp the oil pump collar to the crankshaft so it can't slip and drop the oil pressure. Do you think any slippage could occur with the push you put on that wrench? That pump couldn't be pumping more than 60 lbs and the torque to do that is all you have to overcome.
    I think you are OK as is.
    Dave

    Quote Originally Posted by raymondk View Post
    93 Eldorado Touring Coupe N* I read many of the posts regarding the balancer replacement and was satisfied that the proper tightening proceedure was 37 FT-Lbs + 120 degrees. So I did that. Out of curiosity I looked in my FSM and it says 105 Ft-Lbs + 120 degrees. To get the 120 degrees took holding on with everything I had and pushing the wrench with my foot. Its all together now running over 50 miles. Do I need to go back and try for a few more degrees, loosen and retighten with the 105 FT-Lbs, or is it OK?

  4. #3
    raymondk is offline Cadillac Owners Fanatic
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    Re: Harmonic Balancer Torque

    I thought the same thing but I saw a couple of posts about them slipping and the expert posts were adamant about using the given proceedure. I'm not sure I could move it anyway.

  5. #4
    oldstuff is offline Cadillac Owners Fanatic
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    Re: Harmonic Balancer Torque

    I have a way of countering the "experts" with common sense.
    Dave

    Quote Originally Posted by raymondk View Post
    I thought the same thing but I saw a couple of posts about them slipping and the expert posts were adamant about using the given proceedure. I'm not sure I could move it anyway.

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Harmonic Balancer Torque

    Quote Originally Posted by oldstuff View Post
    I have a way of countering the "experts" with common sense.
    Dave
    As Stephen Foster once penned: "Beautiful Dreamer".

    Is it somehow possible that differing year engines have differing torque + degree settings for the crank pulley (it's not really a harmonic balancer) bolt ?

    I'd like to see the printed quote from the GM manual for a 1993 Northstar that said "105 lb/ft?" + degrees. Nobody's kidding anyone - 105 lb/ft is a LOT of initial torque - even for head bolts.

    Curious that the OP did not look in his service manual FIRST .............................. FWIW, the 2000 and later FWD engine crank bolt spec is 37 lb/ft + 120 degrees.

  7. #6
    raymondk is offline Cadillac Owners Fanatic
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    Re: Harmonic Balancer Torque

    Here's the FSM proceedure in jpeg. Sorry bout the quality but I couldn't get it small enough.
    Attached Images

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    Submariner409's Avatar
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    Re: Harmonic Balancer Torque

    Thanks for posting that there is a difference. It's good info...........

  9. #8
    RippyPartsDept's Avatar
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    Re: Harmonic Balancer Torque

    that's TIGHT!
    Chris Heath (RippyPartsDept) is an ASE Certified GM Parts Consultant at Rippy Automotive
    Rippy is a Cadillac, Hummer, Saturn & Saab dealership - family owned and operated in Wilmington, NC since 1946
    We offer all forum members discounts on parts and freight - e: parts@rippyautomotive.com ph: 800-RIPPY-22
    <-- insert standard boilerplate about posts not necessarily representing my employer, etc -->

  10. #9
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    Re: Harmonic Balancer Torque

    My goodness, 105 lb ft + 120 degrees would be like impossible to torque.

  11. #10
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    Re: Harmonic Balancer Torque

    Now, that's interesting?

    Why the difference?

  12. #11
    Submariner409's Avatar
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    Re: Harmonic Balancer Torque

    Either different crank pulley hubs, oil pump drive sleeves, crank snout machining, other mechanicals.

    There were several different cranks made as the model years progressed - a 2000 crank won't even come close to working in a 1999, and other stuff happened in the 1995-1996 change.

    For accurate work on ANY of these cars the Bible is the proper year GM service manual set - no one has enough experience with the entire FWD Northstar vehicle line to be able to cover all the ins and outs in these forums. Much "car advice" is pretty generic and straightforward - but as always, the real truth on specifications and special procedures is "in the book".

  13. #12
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    Re: Harmonic Balancer Torque

    The harmonic balancer bolt size did change mid 90's also IIRC. In the sticky somewhere it mentions the change.

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