Motor mounts 383? What’s the deal ?

Brakes, Steering & Suspension

  1. Purepony

    Purepony Well-Known Member

    Messages:
    178
    Likes Received:
    93
    Joined:
    Feb 18, 2021
    Location:
    SFV
    Local Time:
    3:37 AM
    So on my challenger I remember the motor mount went out every 90 days until I added two counter shrunk bolts to sandwich and keep everything together. It was suggested at the e body forum and worked

    So this got me thinking since my car seems like I needs a Trans mount but since on the subject how are the motor mounts in these things ? 70 satellite 383

    Is it the same 90 day junk glued together like my challenger 1970 small block ?
     
  2. Jerry Hall

    Jerry Hall FBBO Gold Member FBBO Gold Member

    Messages:
    5,243
    Likes Received:
    8493
    Joined:
    Mar 26, 2018
    Location:
    Alabama
    Local Time:
    5:37 AM
    Before I restored my Superbird, I would have to replace a left side motor mount every time I launched the car hard. I did the same on my motor mount and eliminated the problem. I blamed it on somewhat sticky tires and the 2.76 rear axle. I haven't had problems with transmission mounts. They just seem to get old and compressed. I have gotten junk transmission mounts that require a metric nut. I refuse to use those.
     
  3. 493 Mike

    493 Mike FBBO Gold Member FBBO Gold Member

    Messages:
    3,222
    Likes Received:
    3542
    Joined:
    Dec 25, 2011
    Location:
    White Cloud, MI
    Local Time:
    6:37 AM
    Chinese rubber is NOT a good quality like OEM. Just install a restraint.
    Mike
     
    • Agree Agree x 1
    • Purepony

      Purepony Well-Known Member

      Messages:
      178
      Likes Received:
      93
      Joined:
      Feb 18, 2021
      Location:
      SFV
      Local Time:
      3:37 AM
      So same problem it seems like ? Damn I’m gonna have to replace it

      how hard is it ?
       
    • Purepony

      Purepony Well-Known Member

      Messages:
      178
      Likes Received:
      93
      Joined:
      Feb 18, 2021
      Location:
      SFV
      Local Time:
      3:37 AM
      Thanks Jerry I’m starting to think ThTs my problem the mount
       
    • multimopes

      multimopes FBBO Gold Member FBBO Gold Member

      Messages:
      1,964
      Likes Received:
      2495
      Joined:
      May 6, 2015
      Location:
      Columbia ,NJ
      Local Time:
      6:37 AM
      I think that Shumacker or some similar in name made inexpensive strap systems to mount on the drivers side. They were available for up to and including 72 model year. Of course, my 73 with the big rubber donuts at the K frame are out of luck. I did however try to contact them and I think they went out of business due to Covid or something, not sure. I broke mine on my old 70 Challenger RT as well and used a home made torque chain for a while.
       
      • Like Like x 2
      • Dave6T4

        Dave6T4 Well-Known Member

        Messages:
        499
        Likes Received:
        567
        Joined:
        Dec 31, 2020
        Location:
        Ontario, Canada
        Local Time:
        6:37 AM
        I used to break left side motor mounts on my one-of-none 1967 Coronet R/T station wagon. I built it with a 440/4-speed and 3.55 gears on a Suregrip 8 3/4". The combination of my heavy right foot, heavy launches, and a heavy car resulted in a few broken mounts. I tried a solid mount on that side, but could not accept the vibration and loose screws and bolts it produced. I found that Year One sold a mount that had floating tabs encased in the rubber mount that would lock together when under torque to prevent ripping the mount in half. Mancini Racing has the same type of mount in their catalogue called Polyloc. They are sold as pairs for less than $200.00. I think I was able to buy only the single mount that I needed at the time (thirty years ago) from Year One. After changing it, I never had another failure. The mounts are not too bad to change. Unbolt one side at a time and either lift or jack that side of engine up to get engine bracket and rubber mount out. Change the rubber mount on the steel bracket and reverse the process. You might be able to get away with changing only the left hand side, as the right side is always under compression.

        scan0002[2].jpg scan0001[2].jpg scan0003[1].jpg
         
        • Like Like x 2
        • oldbee

          oldbee FBBO Gold Member FBBO Gold Member

          Messages:
          9,127
          Likes Received:
          9081
          Joined:
          Oct 15, 2011
          Location:
          NE Ohio
          Local Time:
          6:37 AM
          Chinese rubber,yes. No problem with mine--- Moroso steel mounts on engine since early 70's. Hey, it's not a Cad/Buick/ Olds.
           
        • multimopes

          multimopes FBBO Gold Member FBBO Gold Member

          Messages:
          1,964
          Likes Received:
          2495
          Joined:
          May 6, 2015
          Location:
          Columbia ,NJ
          Local Time:
          6:37 AM
          By the way, that Challenger RT was the first car I ever had that had a fan shroud! When the motor mount broke, the fan hit the shroud and made a nice "lathe chewing" sound. It got my attention pretty quick! I had to feather the throttle all the way home. I was lucky the fan wasn't bent! :D
           
        • Nevada dan

          Nevada dan Well-Known Member

          Messages:
          285
          Likes Received:
          331
          Joined:
          Dec 28, 2020
          Location:
          Nevada
          Local Time:
          3:37 AM
          ya , I've bent the hood and the air cleaner on my old super Bee , my dads 70 Imperial had a short cable going from the mount bolts to the block bolts , I stole it off there and put it on mine , he didn't drive it hard enough to do any damage
           
          • Like Like x 2
          • multimopes

            multimopes FBBO Gold Member FBBO Gold Member

            Messages:
            1,964
            Likes Received:
            2495
            Joined:
            May 6, 2015
            Location:
            Columbia ,NJ
            Local Time:
            6:37 AM
            You know, this brings to mind a story from way back when; sometime in the late 60's. It is relating to motor mount failures on Chevy's and maybe other GM cars. It was about a huge recall on a shitload of vehicles because the motor mount would break and when the motor lifted, it pulled the throttle wide open and jammed the steering shaft causing catastrophe (lot's of accidents). I'm pretty sure about this, not just senility!:D
             
            • Agree Agree x 4
            • GOLDMYN

              GOLDMYN Well-Known Member

              Messages:
              208
              Likes Received:
              250
              Joined:
              Jun 17, 2011
              Location:
              chilton, wi
              Local Time:
              5:37 AM
              Yeah, I've seen the toque cable on a few GM cars
               
            • Durandal25

              Durandal25 FBBO Gold Member FBBO Gold Member

              Messages:
              2,269
              Likes Received:
              2075
              Joined:
              Aug 29, 2011
              Location:
              Texas
              Local Time:
              5:37 AM

              ....your ride is awesome. I really dig it.
               
            • 71gtx471

              71gtx471 Active Member

              Messages:
              38
              Likes Received:
              9
              Joined:
              Mar 20, 2014
              Location:
              Harriman NY
              Local Time:
              6:37 AM
              Back in the late 90s a friend of mine picked up a really clean 66 Caprice 396 4dr.that an old man had,the motor mount broke & the throttle went wide open,scared the poop out of the old guy & he sold the car.
               
              • Like Like x 1
              1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
                By continuing to use this site, you are consenting to our use of cookies.