Passenger Lower A-arm/ MT-SS Interference

Discussion in 'Wrenchin' Secrets' started by DasRottweiler, Dec 8, 2019.

  1. DasRottweiler

    DasRottweiler -BuickAddict-

    I'm sure many of you have been here done that. First time for me. I pulled the front drum assemblies off of my 70 Lark in preparation of a disc brake swap. Need more whoa at the big end. It's always strange pulling perfectly new, good parts off of the car, but at least it comes apart easily, (fairly fresh restomod).
    Passenger side rear a-arm bolt is obstructed by header tube. I'm pretty sure the fix is to unbolt header from head and remove bolt. (I'm gonna freshen up a-arms , media blast and re-epoxy)
    2019-12-08 09.42.24.jpg 2019-12-08 09.43.14.jpg
    Just another one of them thangs......Jim
     
  2. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    I had the same issue. Save yourself the time and cut the head off the bolt. That's what I did.
     
    70 GMuscle likes this.
  3. DasRottweiler

    DasRottweiler -BuickAddict-

    Was my first thought as well. That'll work to get it apart, but you cannot feed a bolt in from the rear of the car, the frame bend is too close, so the header has to go for reinstallation anyways....
    I have errands to do today , but I hope to get to it today. That and some plumbing, going to remove the distribution block , fab a bracket and mount the prop valve next to the MC.
    Be easier to hitch up line lock, bleed , etc. I'll post what I end up doing....Jim
     
  4. telriv

    telriv Well-Known Member

    Is jacking the engine up any help???
     
  5. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    That worked for my hooker headers.. at least it's winter.
     
    DasRottweiler likes this.
  6. moleary

    moleary GOD Bless America

    Yup
     
  7. buick64203

    buick64203 Just plum crazy Staff Member

    Cant you just loosen the header bolts? Won't that give you the clearance?
     
    DasRottweiler likes this.
  8. moleary

    moleary GOD Bless America

    That bolt wouldn’t come out the front with header there when I did the A arm swap on mine. I suppose undo the header from the head and the collector flange and all that jazz, or cut the head off in the time it took to write this!
     
  9. DasRottweiler

    DasRottweiler -BuickAddict-

    Unbolted header , gave me just enough clearance to wiggle the bolt out. Needed to unbolt header to re-install a-arm after I repaint it anyways, as the only way to install bolt is from the front of the car. Moving on to prop valve bracket and plumbing for disc brakes.....Jim
     
    Last edited: Dec 9, 2019
  10. PGBuick

    PGBuick Well-Known Member

    I am 99% sure you can get a bolt in from the other side. I have the same headers on my 64 and encountered this issue last spring. Also consider grinding a notch in your A-arm for reassembly where it hits the header tube - helps with spring install. Just noticed you're working on a 70. Mine is a 64, so maybe not the same clearances.
     
    DasRottweiler likes this.
  11. DasRottweiler

    DasRottweiler -BuickAddict-

    Ya, I hear ya on clearancing the a -arm where the tube hits, but it only took a quick prodding with a long pry bar and it popped out. I'll use my internal spring compressor to git the room I need. If that is a PITA, I'll use your idea, but I think I can get it. ..AmeriCAN, not AmeriCan't.......Jim
     

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