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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › Any Tricks ? OS 50 Rod Stuck
04-22-2011 08:45 PM  7 years agoPost 1
Dee Flies 3D

rrApprentice

Farmington Hls, Mich - USA

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Finally getting around to putting bearings in a old OS 50. Been sitting for a long time & the conn-rod is 'stuck' on the wrist-pin up in the piston. I can't get the rod to slide all the way off the crank-pin to remove piston / rod. Anyone made a tool or got a suggestion on how to get the rod to slide on the wrist-pin, for removal ??
I can look up thru the back of the engine & see that theres about 2mm that the rod can slide . . .

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04-22-2011 08:48 PM  7 years agoPost 2
BarracudaHockey

rrMaster

Jacksonville FL

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Spray it with WD40

Andy
AMA 77227
http://www.jaxrc.com

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04-22-2011 08:50 PM  7 years agoPost 3
AzHyper

rrKey Veteran

Peoria, Az.

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When they're really stuck like that I invert the engine, squirt some brake/parts cleaner into the bottom of the piston and let it set for a while. Then pour it out, let it evaporate, and heat the engine in an oven at 300f for 15 min. The heat will expand the top end of the rod at the pin just enough to get that rod over all the way. Frustrating isn't it?

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04-22-2011 08:54 PM  7 years agoPost 4
Dee Flies 3D

rrApprentice

Farmington Hls, Mich - USA

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Just lube didn't seem to work - on to the Heat + Beat part !!!
Good thing it's not for an active bird . . .

Thanks

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04-23-2011 12:12 AM  7 years agoPost 5
junkpilot

rrVeteran

Alamogordo N.M.

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Rod stuck?
Do you have the liner out? If you don't you'll never get it out.
Junkpilot

When you fly JUNK it's hard to tell when you've crashed!

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04-23-2011 02:03 AM  7 years agoPost 6
Gyronut

rrProfessor

Martinsville In.

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+1 for the liner

Rick

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04-23-2011 02:06 AM  7 years agoPost 7
crash&fix612

rrNovice

Olean,NY USA

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I agree, you need to remove the liner before the rod will ever come off

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04-23-2011 02:35 AM  7 years agoPost 8
Dood

rrProfessor

Wescanson

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C'mon, guys.
Since Dee Flies 3D has been registered here since 2005, has been flying nitro helicopters for at least as long and nitro airplanes for longer, I would give Dee the full benefit of the doubt that he knows how to disassemble an engine. I'm sure he knows the liner needs to come out.
Lets not insult the man.

  ▲
▲ ▲

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04-23-2011 03:11 AM  7 years agoPost 9
GREYEAGLE

rrElite Veteran

Flat Land's

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Crock Pot & Glycol
Besides it will come out fresh as a Daisey.

Just need to clean the crud off - couple hour's will do it.

greyeagle

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04-23-2011 03:41 AM  7 years agoPost 10
airdodger

rrElite Veteran

Johnston USA

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Use a heat gun it will slide and don't get burned.

Chris

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04-23-2011 03:53 AM  7 years agoPost 11
rudyy

rrElite Veteran

E. Amherst, NY

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Put it in a oven and cook it for 10mins at 350F. Everything will be loosened.

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04-23-2011 02:16 PM  7 years agoPost 12
Dee Flies 3D

rrApprentice

Farmington Hls, Mich - USA

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ALL DONE. Heat loosened the wrist-pin enough. YES - i know to take-out liner. [ Thnx DOOD !!] Hek - I even made a small tool to get the rear bearing disloged. Heat didn't even git that loose !!!
Lesson is DON'T wait too long to re-build. Bag + Oil for storage if you can't get to it rite away . . .

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04-23-2011 02:55 PM  7 years agoPost 13
rcjon

rrVeteran

Macon, GA

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Put it in a oven and cook it for 10mins at 350F.
Salt to taste and serve with a sprig of parsley.

Ask your doctor if your heart is healthy enough for Radio Control Helicoptering.

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04-23-2011 02:58 PM  7 years agoPost 14
heli-cuzz

rrElite Veteran

Pittston, Pa. USA

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Heat will free any gummed up parts. Glad you got it sorted out.

Fury 55 NIB Furion6 CGY750 fbl helicopter-Frenzy CGY750 fbl nitro-Frenzy fbl NOBAR90

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04-23-2011 03:33 PM  7 years agoPost 15
Swoop

rrElite Veteran

Newark, DE USA

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I have always used the short end of a small allen key to reach up inside and gently slide the con rod on the wrist pin. (and a little lube always helps, ATF)

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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