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Technical Any tips for removing back window with REALLY old/hard rubber? (1941 Buick)

Discussion in 'The Hokey Ass Message Board' started by Curt Six, Feb 9, 2019.

  1. Curt Six
    Joined: Sep 19, 2002
    Posts: 843

    Curt Six
    Member

    I'm removing all the glass from my '41 Buick because we're getting ready to chop it. I cracked the windshield trying to separate it from the very original and very hard rubber gasket. No biggie because it's flat glass, but I don't want to do the same with the backlite. Any tips?
    Thanks.
    Curt
     
  2. 32v
    Joined: May 20, 2007
    Posts: 920

    32v
    Member
    from v.i.

    maybe some brake fluid , it destroys some rubber
     
  3. BJR
    Joined: Mar 11, 2005
    Posts: 5,706

    BJR
    Member

    Use a box cutter and cut the lip off of the rubber to expose the edge of the glass. You will need to buy new rubber anyway so just cut the glass out.
     
  4. s55mercury66
    Joined: Jul 6, 2009
    Posts: 3,614

    s55mercury66
    Member
    from SW Wyoming

    ^^^ Break out the knife, save yourself a lot of grief.
     
    egads likes this.
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  5. RMONTY
    Joined: Jan 7, 2016
    Posts: 1,331

    RMONTY
    Member

    I cut the glass out of my 51 Chevy a few weeks ago. I just cut the old rubber down to the pinch weld and the glass all but fell out. The rubber moulding was hard and brittle but it did cut ok.
     
    john worden likes this.
  6. wingspread7
    Joined: Mar 29, 2009
    Posts: 744

    wingspread7
    ALLIANCE MEMBER

    Squirt some penetrating oil or any oil on it and let it soak before cutting.
     
    3340 likes this.
  7. choptop40
    Joined: Dec 23, 2009
    Posts: 3,352

    choptop40
    Member

    Utility knife, cut around perimeter on out side , sometimes the glass will still stick to the inside face , score that area with said knife and ...viola..now...putting it back in is another technique by itself consisting of rope , soap and assistance of a dope....ha ha
     
    scrap metal 48 likes this.
  8. fastcar1953
    Joined: Oct 23, 2009
    Posts: 1,610

    fastcar1953
    Member

    i use a knife but tv shows use hammers. lol
     
    Irish Mike likes this.
  9. tb33anda3rd
    Joined: Oct 8, 2010
    Posts: 14,995

    tb33anda3rd
    ALLIANCE MEMBER
    1. Connecticut HAMB'ers

    when we would swop windows out of parts cars, to use the glass in the vehicle we would be saving. we would, break the glass to save the rubber on the project. cut the rubber on the donor to save the glass out of the parts vehicle.
     
    bobss396, low budget and Hnstray like this.
  10. tombstone
    Joined: Jan 15, 2006
    Posts: 281

    tombstone
    Member
    from sk.canada

    I have removed a windshield from a 53 chev that had sat for years outside , I liberally loaded it with WD 40 and let it sit for just a few hours , damn thing slid out with very little effort .
     
    3340 and Truck64 like this.
  11. ...mite warm up the rubber with a butane torch very carefully, mite cut a lil easier
     
    samurai mike likes this.
  12. 1946caddy
    Joined: Dec 18, 2013
    Posts: 1,475

    1946caddy
    Member
    from washington

    Or a heat gun. :)
     
  13. samurai mike
    Joined: Feb 24, 2009
    Posts: 426

    samurai mike
    Member

    heat gun and a knife is the way to go.
     
    john worden and blowby like this.
  14. junkman8888
    Joined: Jan 28, 2009
    Posts: 423

    junkman8888
    Member

    If the rubber is in any way pliable I use the box knife and a fresh blade, you want to swap out the blades often as the easiest way to get cut is to try to cut with a dull blade. If the rubber is really brittle I use a long-handed gasket scraper and a rubber mallet. You want to hit away from the center of the glass, not towards the center of the glass.
     
  15. Curt Six
    Joined: Sep 19, 2002
    Posts: 843

    Curt Six
    Member

    Thanks fellas. Worked like a charm. Took a while with two of us but the glass came out intact.
     
  16. Great news there.:)
     
  17. jetnow1
    Joined: Jan 30, 2008
    Posts: 1,299

    jetnow1
    ALLIANCE MEMBER
    from CT
    1. A-D Truckers

    so which method did you use?
     
  18. The box cutter is the only way to remove the glass, the petrified rubber isn't reusable anyway. HRP
     
  19. Curt Six
    Joined: Sep 19, 2002
    Posts: 843

    Curt Six
    Member

    The Buick glass is installed from the inside, so there's a rubber molding that captures the trim and the pinch-welded seam on the outside and the glass on the inside. I sprayed PB blaster around the rubber the day before, then @Cody Walls and I cut the rubber (outside of the perimeter of the glass) all the way around on the inside, then we slid a blade along the glass (running parallel to the glass) on the outside to break the bond with the rubber. It released pretty easily after that. Then we cut the top off the car. chop curt and cody.jpg
     
    jazz1, ottoman, tb33anda3rd and 4 others like this.
  20. BJR
    Joined: Mar 11, 2005
    Posts: 5,706

    BJR
    Member

    That was pretty drastic punishment for the car for not letting go of the rear glass.
     
  21. Curt Six
    Joined: Sep 19, 2002
    Posts: 843

    Curt Six
    Member

    We don't take shit off anyone.
     
  22. jazz1
    Joined: Apr 30, 2011
    Posts: 1,462

    jazz1
    Member

    Make sure the glass can't fall inside and break when removing the rubber. I was not expecting that to happen.
     

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