KENNY MCATEE Posted December 3, 2020 Report Share Posted December 3, 2020 NO CABIN HEAT. re placed scat tubing from exhaust. flapper is open. no heat in cabin. BURRR .plugged all inside air leaks. Quote Link to comment Share on other sites More sharing options...
KENNY MCATEE Posted December 3, 2020 Author Report Share Posted December 3, 2020 front air opening is clear on cowling. Quote Link to comment Share on other sites More sharing options...
BravoFoxtrot Posted December 3, 2020 Report Share Posted December 3, 2020 The two most common problems with poor heat are the front opening blocked or the valve not closing properly. You state that the opening is clear, is the rubber gasket between the inlet to the muffler and the cowling in good shape? When you say the flapper is open are you looking from where the scat tubing connects? When you look down from above the valve you see an exhaust port. When you do not want cabin heat, this will be open. When you do want cabin heat this will be closed. If this is not firmly closed it will leak most of the hot air out. The easiest place to adjust this is at the back of the pull knob on the panel. Let us know what you find. Quote Link to comment Share on other sites More sharing options...
Al Downs Posted December 3, 2020 Report Share Posted December 3, 2020 Poor heat has been a problem forever. I have 4 ct's and they are all the same. There is one more area that needs to be addressed. The heat shroud around the muffler is full of leaks allowing the heat to escape before it can enter the cabin. Sealing all these leaks makes a big improvement. Remove the muffler and take off the heat shroud. Clean it all well. Put sealer on the two rings that go around the muffler and all along where the rings and muffler meet. Reinstall the heat shroud and from the outside, seal everyplace that heat can escape from. Make sure to run the engine afterwards before flying or you will have a cabin full of smoke. It doesn't take long for smoke from the heated sealer to go away but you don't want it to smoke in the air. I first tried red RTV. That does not work well. It gets too hot. I now use Deacon 8875 high temp sealant. It is pricey but works the best of things I have tried. It is kinda expensive but it fixes the air leaks and holds up to the heat. It is available in a tube or can. I find the can is my best option because I can seal the can for future use. Quote Link to comment Share on other sites More sharing options...
okent Posted December 3, 2020 Report Share Posted December 3, 2020 Al, how much of a difference does it make? Will it run you out/get really warm in the cabin and do you seal up the holes in the cabin as well? Quote Link to comment Share on other sites More sharing options...
Al Downs Posted December 3, 2020 Report Share Posted December 3, 2020 It makes a big difference. If the air leaks out before it gets to the cabin, you lose most of your heat. It take the path of least resistance. It is very important you have as much of the cabin sealed as you can. Do you have a SW or LS? You will still need a coat but maybe not gloves. With temps yesterday in the 20's and full sun, it was comfortable. Mine are all LS's. Air still comes in thru the tunnel between the seats and around the door handle. I have not found a good way to seal those areas up yet. I have covers I made for the holes at the wing root and that works great Quote Link to comment Share on other sites More sharing options...
Bill3558 Posted December 3, 2020 Report Share Posted December 3, 2020 Yessir, some cold air comes thru those wing root openings. I duct taped them over. Quote Link to comment Share on other sites More sharing options...
Al Downs Posted December 4, 2020 Report Share Posted December 4, 2020 This is what I put on my plane Quote Link to comment Share on other sites More sharing options...
BravoFoxtrot Posted December 4, 2020 Report Share Posted December 4, 2020 "The heat shroud around the muffler is full of leaks allowing the heat to escape before it can enter the cabin." Good point Al. I never thought of this. Quote Link to comment Share on other sites More sharing options...
AGLyme Posted December 4, 2020 Report Share Posted December 4, 2020 Al, those see thru plugs are brilliant. Do you sell them ? Better than my packing tape solution. Quote Link to comment Share on other sites More sharing options...
Al Downs Posted December 4, 2020 Report Share Posted December 4, 2020 I will have to look tomorrow and see what I have. I will let you know Quote Link to comment Share on other sites More sharing options...
okent Posted December 5, 2020 Report Share Posted December 5, 2020 +1, I've been using packing tape as well. Quote Link to comment Share on other sites More sharing options...
Al Downs Posted December 5, 2020 Report Share Posted December 5, 2020 Does the +1 mean you want them too? Quote Link to comment Share on other sites More sharing options...
okent Posted December 6, 2020 Report Share Posted December 6, 2020 Yep Quote Link to comment Share on other sites More sharing options...
Al Downs Posted December 6, 2020 Report Share Posted December 6, 2020 $190 plus $15 shipping. Al Downs 2825 Golf Ave. Racine, WI 53404 Send me your shipping info Quote Link to comment Share on other sites More sharing options...
okent Posted December 7, 2020 Report Share Posted December 7, 2020 Al, I''ll have to pass on the covers at that price. Thanks for the offer though. Tom Quote Link to comment Share on other sites More sharing options...
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