DustinNwind Posted October 7, 2019 Report Posted October 7, 2019 Hi All, Just got out of annual and took her on a maiden voyage today form KSMO to L35. Great flight, new heater hoses smell awful, but will dissipate after time. Odd thing - on right seat at the legs it feels like there is heat coming through even though it's off. It's worst in a nose up attitude. Any idea what it could be? Thank, D Quote
N201MKTurbo Posted October 7, 2019 Report Posted October 7, 2019 It depends on which heater valve you have. Either way you have to make sure it is closing off completely when it is off. You can see if you remove the hoses on the engine side of the firewall. If you have the valve with the door that swings, the seals can deteriorate and need to be replaced every few decades. The seals are just baffle seal material. I don’t remember exactly how they are attached but they can be repaired easily. 1 Quote
jetdriven Posted October 7, 2019 Report Posted October 7, 2019 (edited) You can get some 16th inch thick silicone sheet from McMaster Carr and cover the swing valve flapper inside there with that. The valve with the sliding mechanism doesn’t seal, really, and hot air leaks through. It’s worth it to get the 1979 and later valve and retrofit it. Edited October 7, 2019 by jetdriven 1 Quote
Yetti Posted October 8, 2019 Report Posted October 8, 2019 In theory I believe the the defrost are always on. Given that one of the hoses to the defrost may have fallen down and can't get up. 1 Quote
DustinNwind Posted October 9, 2019 Author Report Posted October 9, 2019 Found the culprit, photos below. Anyone have a spare heat box for sale? In the mean time, I sealed up the hole. Quote
carusoam Posted October 9, 2019 Report Posted October 9, 2019 See if @Alan Fox has one... Later than 65 heat control flap? 65 and older are slide gates... Look for two... one is for hot air, the other is for outside air...? That one looks a bit dusty. -a- Quote
larryb Posted October 9, 2019 Report Posted October 9, 2019 I'd just fix the one you have. Looks like the only bad part is the flapper. Fabricate a new flapper out of aluminum sheet and rubber sheet from McMaster Carr. Clean up and paint the housing. Should work good as new. Quote
DustinNwind Posted October 9, 2019 Author Report Posted October 9, 2019 1 hour ago, larryb said: I'd just fix the one you have. Looks like the only bad part is the flapper. Fabricate a new flapper out of aluminum sheet and rubber sheet from McMaster Carr. Clean up and paint the housing. Should work good as new. Thought the same thing but the rod area has a lot of play since it too has rusted out a lot. Quote
DustinNwind Posted October 9, 2019 Author Report Posted October 9, 2019 2 hours ago, carusoam said: See if @Alan Fox has one... Later than 65 heat control flap? 65 and older are slide gates... Look for two... one is for hot air, the other is for outside air...? That one looks a bit dusty. -a- Hah, yes, Dusty. The inside air vent is a slide and the outside is flap. 1 Quote
jetdriven Posted October 9, 2019 Report Posted October 9, 2019 Retrofitted one of these, you can too. https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F271906083092 Quote
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