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-   -   Engine Dehydrator Home made? (https://vansairforce.net/community/showthread.php?t=26286)

IowaRV9Dreamer 12-12-2009 01:41 PM

Looking for extra oil filler cap
 
I'm looking to build one of these... does anyone have an extra Lycoming bayonet style (not screw in) oil filler cap that they would like to part with? I don't need the dipstick, just the filler cap, hopefully with O-ring.

This is for an O-235, but I think it might be the same part for the O-320

PM me if you have one!

frankh 12-12-2009 02:52 PM

Update...went for my post annual check out flight...plugged in the dryer and saw a visible plume of steam from the filler cap...of course it was minus 5degC...very satisfying knowing that was coming out of the crankcase

IowaRV9Dreamer 03-01-2010 06:09 PM

worked for me
 
I built one of these this winter for the Skipper - I get the satisfying plume of moisture everytime I turn it on. The first 1/2 inch or so of the HF pellets have turned pink. I'm glad that moisture isn't in my engine any more!

PaigeHoffart 05-21-2010 08:21 PM

Oil filler Cap alternative
 
For those wanting to create a closed system, I recently discovered that an AN14 o-ring boss plug fits perfectly on the O-360. Drill and tap for a brass nipple available at hobby stores (I used one made by Dubro), and you're set for less than $10.

Paige

Txflyer 11-07-2013 09:53 PM

Holy thread resurrection Batman!

I'm sitting here looking at a military sealed ammo box getting ideas it looks like a dehydrator. :rolleyes:

bobnoffs 11-08-2013 06:19 AM

to put a little different twist on this.........i have a 25 watt stick on heater on my oilpan and one on my crankcase. my oil temp stays 50 degrees above oat and the heads stay 12-15 deg. above. i take out my oil filler cap and i am thinking my oil will quickly evaporate any moisture as it is so much warmer than surrounding air and any steel on the engine is less likely to rust because i am above dewpoint by 10 degrees. 50 watts isn't a big deal to run 24/7

Bavafa 11-08-2013 08:56 AM

Quote:

Originally Posted by IowaRV9Dreamer (Post 410059)
I built one of these this winter for the Skipper - I get the satisfying plume of moisture everytime I turn it on. The first 1/2 inch or so of the HF pellets have turned pink. I'm glad that moisture isn't in my engine any more!

I built and used one last winter and did not get any or at least much moisture out. I am in the West and it is a much dryer climate though.

I will be using it again as the moister weather is arriving.

bobnoffs 11-09-2013 02:11 PM

ok, i have read all the posts on this and unless i am missing something i can't see how this can be reducing moisture in the air it pumps by more than a miniscule amount. the pump is pulling air from the hangar and into the engine? if the pump was pumping a closed circuit from engine back to engine maybe but this pump is probably taking at least a couple cubic foot of air a minute. i don't in a million years believe that a quart of silica can be pulling the moisture out of a volume of air like that for very long. i imagine the calculations could be done to figure the water in a cubic foot of air at stp and a given humidity and i am not going there but i bet the air humidity change in and out with the air pump can't be measured. also, the air is being sent all around the parts that are constantly splashed with oil. no way for the air to get the upper cylinders etc.
my thoughts on keeping rust away are always shut down the engine after getting it hot, remove dipstick cap and keep all the engine metal warmer than the surrounding air.

and i could be all wrong.


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