Lycoming IO-233 with cabin heat?

[Flybyjim]

Thanks for the photos and explanation, these look very well made John. It looks like they actually make a good seal. Did you or do you have a machine shop, it looks like you used a press to form the holes and a brake to bend the flanges.

[jrevens]

Thanks for the photos and explanation, these look very well made John. It looks like they actually make a good seal. Did you or do you have a machine shop, it looks like you used a press to form the holes and a brake to bend the flanges.

Thanks, Jim. I just made them in my workshop at home. Yes, I have a 4' pan/finger brake, and a press for forming the flared opening & the flanges on the round tube (with tooling that I made).