Help, I can't break the Harmonic Bolt

Discussion in ''Da Nailhead' started by SkylarkNut, Feb 21, 2004.

  1. SkylarkNut

    SkylarkNut Well-Known Member

    I can't break the Harmonic Balancer bolt free on my 65 401. It appears to have never been broken for 39 years.

    First, it is RH tread right?

    I tried a 20" 1/2 breaker bar with no luck.

    Then tried my Chi Chang 1/2 zip gun.

    no luck

    Any good tricks?

    The machine shop called today and said the one at the shop now is not the best. This one is on an extra block I have. Everything looks to be original as can be.

    Are these things available anywhere?:(
     
  2. Bad Boattail

    Bad Boattail Guest

    Is the engine still in the car? Place a socket on it, with a big bar. Let the bar rest on the ground (drivers side) and crank the starter.
     
  3. Brian

    Brian Displaced VA Hillbilly

    You need to throw away that Chinese impact wrench and go buy a good CP or IR 1/2" impact that will pull at least 450 ft. lbs. Then that bolt will come right out. It is right hand threads.
     
  4. SpecialWagon65

    SpecialWagon65 Ted Nagel

    Need good impact wrench like "CP or IR 1/2" impact " Thats what it took for my nailhead- I broke a socket and a extension using my breaker bar and 5' pipe. Impact did not even strain, bolt came out (musta loosened it up with the busted socket, eh?)
     
  5. GSMAG

    GSMAG Well-Known Member

    Bad Boattail is right...if the engine is still in the car. It's by far the easiest way to break that bolt loose.
     
  6. nailheadina67

    nailheadina67 Official Nailheader

    With my luck, if I tried that, I would likely put the breaker bar through the radiator.:af:
     
  7. r0ckstarr79

    r0ckstarr79 ricedestroyer.com

  8. nailheadina67

    nailheadina67 Official Nailheader

    I bent a valve once doing that on my old Dodge Caravan with the timing belt off the pulleys.:Dou:

    I'll never make that mistake again!:af:
     
  9. SkylarkNut

    SkylarkNut Well-Known Member

    Engine is not in the car - extra block

    Nope, the engine is just a complete short block on a dolly/crated with casters.

    I think I will have to invest in a good impact.

    Thanks

    kg
     
  10. DugsSin

    DugsSin Well-Known Member

    ...and some impact sockets too.
     

Share This Page