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Proper way to remove and install exhaust on BC12-D

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  • Proper way to remove and install exhaust on BC12-D

    From what I have read you need to unbolt the engine to remove and install a stock exhaust system. Does one unbolt the engine from the motor mount or does one leave the engine on the motor mount and unbolt the motormount from the fire wall? After unbolting the exhaust last night it was not clear to me or my mechanic on which way to proceed. I presume the installation will follow the same process.

    Planning on using the services of Custom Aircraft Parts at El Cajon CA. Has anyone worked with them?

    Any help and opinons are appreciated.
    Cheers
    Jim

  • #2
    Re: Proper way to remove and install exhaust on BC12-D

    unbolt from firewall

    Comment


    • #3
      Re: Proper way to remove and install exhaust on BC12-D

      If you take the engine loose from the mount the mount still has to be removed from the firewall to get the exhaust off. I agree with Dave, pull from the firewall.

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      • #4
        Re: Proper way to remove and install exhaust on BC12-D

        Sorry to say, the design sucks. It is one of those assemblies that require three different things to all be done FIRST. The above posts are right on. You basically loosen EVERYTHING with the engine hanging from a hoist and work the exhaust through the maize. A little easier if you take the heater shroud off before you try to work the exhaust out (plus you will do a lot less damage to the shroud).
        Nice thing is you don't have to take the cylinders off to remove the exhaust. Not much, bit at least it could be even worse.

        Make SURE your hoist can be locked when the engine is on it. Some hydraulic hoists can leak down and the soft parts of the engine and baffles could get damaged. Good time to replace your rubber shock cones and make sure the proper washers are under the mounts. Also a good time to clean up the firewall and make the inside of your compartment look really good. Check the engine to airframe ground strap (you will improve your radio reception).

        If you can, DO A VIDEO, so you can remember how to put it back together (and provide a great education for the rest of us). We promise to not laugh (too much). I wish I had done a video. I have done this several times and still forget lots of steps and have to redo things.

        Hank

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        • #5
          Re: Proper way to remove and install exhaust on BC12-D

          Also, much easier to do this if you have the aircraft somewhat leveled. You won't have to fight the engine and mount when trying to get everything off and back on the firewall.
          Cheers,
          Marty


          TF #596
          1946 BC-12D N95258
          Former owner of:
          1946 BC-12D/N95275
          1943 L-2B/N3113S

          Comment


          • #6
            Re: Proper way to remove and install exhaust on BC12-D

            Pull it off and place it in the garbage where it belongs...then go with Luscombe exhaust. Well worth the time and money!!
            John
            I'm so far behind, I think I'm ahead

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            • #7
              Re: Proper way to remove and install exhaust on BC12-D

              Hi John,

              In that case then it is best to just cut it off and not even bother to unbolt the engine mount or engine controls.

              I think that you are on to something.

              I wonder what the diff in cost of a new t-craft system compared to a Luscombe system is?

              Dave

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              • #8
                Re: Proper way to remove and install exhaust on BC12-D

                Sawzall, then install a luscombe one...or Cessna 150 if you need heat. see 337s in the tech references section. Tim
                N29787
                '41 BC12-65

                Comment


                • #9
                  Re: Proper way to remove and install exhaust on BC12-D

                  Originally posted by drude View Post
                  Hi John,

                  In that case then it is best to just cut it off and not even bother to unbolt the engine mount or engine controls.

                  I think that you are on to something.

                  I wonder what the diff in cost of a new t-craft system compared to a Luscombe system is?

                  Dave
                  Back when I did mine, it was because my exhaust had a hole in it plus the shroud was in really bad shape, the costs where about the same. I wasn't trying to create a show plane so it was a no-brainer for me.
                  Dave

                  F22 Experimental Build
                  46 BC12-D
                  N95078

                  Comment


                  • #10
                    Re: Proper way to remove and install exhaust on BC12-D

                    4 years ago the complete system from doug combs of the luscombe foundation was $1100.00 plus I think Terry charged $200 for the paper work Dougs system has tabs to hold the heat muffs univaire does not and muffs will crack.
                    Attached Files
                    1940 BLT/BC65 N26658 SER#2000

                    Comment


                    • #11
                      Re: Proper way to remove and install exhaust on BC12-D

                      So, if I go with the Luscombe exhaust, which one should I use? The dual exhaust or the one with the crossover? Anybody want to buy a T-cart exhaust that is ceramic coated?

                      Thanks,
                      Bruce
                      N95893

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