I'm looking for a spare oil filler cap for an IO-470.

Actually, a hard rubber stopper would probably do as well, but the cap would be preferred. I'm building a recirculating air dryer and the cap would be a nice way to install the fitting.

Can't find one in a quick web search (and my parts books are at the hangar). Any thoughts?

Thanks,
Jay

Jay,
I made one last year. Used a rubber plumbing coupling that fits over the filler neck on my IO470N. With a plastic threaded stop plug in one side, drilled it for a fitting to attach the tubing from the dryer. I'll see if I have any pictures, or can snap one tomorrow.
Tough part is getting clearance from the closed cowl door as I throw a blanket over for pre-heating.
Paul

Thanks Paul! Same motor. I was thinking that a right angle may let me route the dryer tube out the front, where my Tanis electrical cord is hooked up. I like your idea of the plumbing fitting.
Best,
Jay

Jay,

Try the lawn mower shop.

Are you building a silica-based system? I was thinking of doing this myself. There are some good examples on the web.

Are you going to try to de-humidify the top-end?

--paul

Good thought Paul! There is one on the way from home to my field.

Yes, I've ordered the kit from Barker Aviation, and will let you know how it works out.

Jay

Is this the kit featured in this months EAA magazine?

Looked interesting to me... until I got to the schematics on the circuit board... then decided it was above my pay grade.

Leldon

Jay,

I was thinking of adapting some of the new compressor-less systems to this application. I am amazed how inexpensive the Peltier module based systems are. Some are even available at Target for $60. I see this model is on-line. I'll drop by a store and see if I can get an eyeball on.

--paul

The problem with "cooling" based dehumidifiers, compressor or peltier bi-metallic style, is they will freeze up in cool environments.
Below an ambient room temp of 45F, won't work well, below 32F don't work at all.