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HelicopterEngines Plugs Mufflers Fuel › engine cleaning
04-08-2011 07:21 AM  6 years agoPost 21
asm

rrVeteran

California

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Another vote for "Dawn" Power Dissolver. Spread it on and wait for 20 minutes. Work it with tooth brush for tougher stain. For the most stain, it will simply rinse off. Repeat if necessary.

For heavy baked on castor stain, pre-heat oven to 275 degree. Place the engine part on a piece of 2x4, spread on the dissolver and off it go into the oven. You want to bake it out enough to "boil" the dissolver, but not over bake to the point drying up the dissolver. For my oven, it takes 10 to 20 minutes. Remove from oven and give it toothbrush and warm water treatment.

There isn't been any stain I'm not able to remove with this method. Tried the anti-freeze and crank pot stuff. It failed to remove baked on castor and also darken the crank case. And no, I did not over heat the anti-freeze solution. The temperature was control by a specially rig device with temp prop in the solution for 160 degree. The entire rig is than set on timer for 4 hours. The crank case got dark before solution did any thing to the stain.

B

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04-08-2011 07:48 PM  6 years agoPost 22
Gearhead

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Vt

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""Tried the anti-freeze and crank pot stuff. It failed to remove baked on castor""

here too the Antifreeze didn't remove the Castor, but I could wipe it off easily,, the case did not gray

Jim
Buzz Buzz Buzz

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04-08-2011 10:33 PM  6 years agoPost 23
GMPheli

rrElite Veteran

W. Bridgewater, MA USA

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I wonder if different alloys of aluminum are being used for engine cases and that is why some people have good luck with the antifreeze and some don't. It has to be something like this.

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04-09-2011 12:30 AM  6 years agoPost 24
human213

rrVeteran

malibu

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Just remember when you get that mess off...

it happened because of inappropriate fuel and engine operation care in
the first place.

Proper running and minimal care means it should not happen,
and is a sign of equipment abuse.

m

Not everything that can be counted counts, and not everything that counts can be counted.

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04-09-2011 01:26 AM  6 years agoPost 25
asm

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California

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I wouldn't make the assumption.

The use of castor oil as lubricant will always resulted in castor deposit on the crank case. If those deposit is formed in between the crank case fin, it would be difficult to notice or even remove after each flying session.

B

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04-09-2011 02:22 AM  6 years agoPost 26
jgunpilot

rrKey Veteran

Pollock, LA

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Just remember when you get that mess off...
it happened because of inappropriate fuel and engine operation care in
the first place.

Proper running and minimal care means it should not happen,
and is a sign of equipment abuse.
So those black spots on my pipe are from abuse, huh? Well, I'll try harder not to abuse my equipment next time, Dad. I'll implement a comprehensive 37 step maintenance program for post flight, I promise.

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04-09-2011 03:22 AM  6 years agoPost 27
dkshema

rrMaster

Cedar Rapids, IA

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Tried the anti-freeze and crank pot stuff. It failed to remove baked on castor
Well, next time you try it, use a CROCK pot instead. Crank pot sounds like something you'd cook up drugs in.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-09-2011 04:13 AM  6 years agoPost 28
Gearhead

rrMaster

Vt

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GMPheli, I would have to say yes there, I cooked 2 Engines, an OS 61FX and a GP 40, the Castor removed easier off the GP 40 than the OS

Jim
Buzz Buzz Buzz

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04-09-2011 04:16 AM  6 years agoPost 29
Gearhead

rrMaster

Vt

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dkshema, I have seen Crack Pots before but never a Crank Pot

Jim
Buzz Buzz Buzz

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HelicopterEngines Plugs Mufflers Fuel › engine cleaning
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