stunthanger.com
Engine basics => Engine set up tips => Topic started by: goozgog on January 29, 2017, 08:57:49 AM
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Gentlemen, I have a bar stock
Ro-Jett .65 that's running perfectly,
but after many hundreds of flights,
it's getting brown and gummy.
It has run exclusively on Powermaster -
Ro-Jett fuel.
Usually, I would crock pot it in new,
green, antifreeze, but I'm concerned about
pitting the bar stock case or removing any
"good" cylinder varnish.
Should I just remove and clean the head?
What do you think?
Cheers! - K.
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must not... resist... wouldn't help... Oh hell!
I would, but only after asking here. Or maybe after asking Dub for his recommendation. Most engines I'd just do whatever I wanted to with, but those are pretty special engines.
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The instructions for the bar stock RO-Jett recommend not using any "cleaner", but merely wiping with a clean cloth. No specific recommendations come with the cast crankcase. Other than making the bar stock engine look less shiny, this engine is just like any other, which can be dropped into a crock pot/anti freeze.
My RO-Jett 61 (cast case) got varnished up after much running. I removed the cylinder head and polished the bore with a Scotchbrite pad, which removed the carbon. On mine, only the muffler gets all dark from burned fuel/exhaust.
Floyd
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Thanks everyone!
I think I might just remove the head and
crock pot that and also do some tests with
some 6061 scraps.
I'll report back with my results.
Cheers! - K
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Keith,
Don't use any cleaner that has ammonia in it. It WILL turn the aluminum black. Don't ask me how I know...............
Jerry
PS: I use Prestone anti freeze in mine with great success.
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Acetone / Lacquer Thinner useually gets Triumph Aluminum parts squeeky clean . Just the head first thou, Eh .
Don't use any cleaner that has ammonia in it. It WILL turn the aluminum black
And Whats Wrong with a BLACK motor, anyway . ;D
Er , bicarbonate soda boiled & a OS 29 got a ' magnesium ' crank case , too . :P
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Gentlemen, I have a bar stock
Ro-Jett .65 that's running perfectly,
but after many hundreds of flights,
it's getting brown and gummy.
It has run exclusively on Powermaster -
Ro-Jett fuel.
Usually, I would crock pot it in new,
green, antifreeze, but I'm concerned about
pitting the bar stock case or removing any
"good" cylinder varnish.
Should I just remove and clean the head?
What do you think?
Cheers! - K.
I would clean it up as well as you could on the outside with various solvents like acetone and lacquer thinner, and leave it alone. The key observation is in bold above.
It works fine in a crock pot but you don't need any internal cleaning. Mine has many hundreds of flights, too, but it is clean on the outside. Hard for me to see how it got too gunky, assuming you don't get a lot of blow-back from running the pipe too short.
Brett