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HelicopterMain Discussion › How do you remove burnt on stains from engines?
05-08-2005 08:49 PM  12 years agoPost 1
greenflyer

rrNovice

UK - Kent

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How do you remove burnt on stains from engines? Does anyone know how to get an engine back to its pristine state , that is after castor or fuel has burnt on to the engine and the exhaust.

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05-08-2005 08:56 PM  12 years agoPost 2
SkateFreak

rrElite Veteran

Cambs UK

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Scour Pad

But i guess that might kinda ruin the thin clear coat over the engine
Well OS anyways.....

-Jvr

Non-3D heli pilots are planker spys trying to bring down the heli community from the inside - Topher

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05-08-2005 08:57 PM  12 years agoPost 3
Leif

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USA

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For exhausts, slow-cooking in antifreeze using a crock pot usually works. If you tried this with an engine you would need to disassemble it first and only cook specific parts (head, block and backplate)

The best thing to do is avoid castor-based fuels and go with something with all-synthetic oils.

Leif

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05-08-2005 08:58 PM  12 years agoPost 4
Phranque

rrApprentice

Wherever you go, there you are.

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Go to the search function, and type "engine cleaning", or "engine antifreeze". There is some good info floating around.

Flying a heli is like seeing the Matrix, it is a mind bending experience.

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05-08-2005 09:13 PM  12 years agoPost 5
UK Helinut

rrApprentice

Gloucestershire

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Nitro morse paint stripper works wonders. just paint it on, put it in a plastic bag or container and leave it for a few hours. Then give a gental scrub with an old toothbrush. Caster stains just fall away.

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05-08-2005 09:14 PM  12 years agoPost 6
heligoole

rrKey Veteran

yorkshire,uk

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make sure after cleaning that you richen yourmixture cos maybe your engines too hot if its burning on the castor...i ran my 50 os in using castor(model;technics 16%) and although covering a lot of the fins on the engine with castor during flight...it never burnt on because i ran it slightly rich(so engine cooler),,normally wiped/dripped off...still quite clean..3 gallons through...exhaust was different...just cleaned that burnt on with wd40

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05-08-2005 10:30 PM  12 years agoPost 7
ShempHoward

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San Francisco, Ca - too many beggars + bad drivers

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The crockpot antifreeze method works well provided you use the right type and ratio mix of water to antifreeze and you don't leave it in too long which will cause etching discoloration of the aluminum parts. Antifreeze is high alkaline content and this will adversely affect the finish on any aluminum (aluminium?) glow engine given time and concentration of the mix used. BTW - There is no clear coat on OS engines. A green synthetic scrubbie or stiff synthetic bristle brush will help loosen stubborn stains. Use rubber gloves.

There are purpose designed engine cleaners sold here in Local Hobby Shops that work well so I will assume the same goes for the UK as well.

Both Castor and Synthetic lube will cause this brown stain effect but Castor seems most responsible for it even on cool running engines since baked on Castor is not always indicative of a hot running engine.

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05-09-2005 12:04 AM  12 years agoPost 8
Peefor

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Norfolk UK

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To restore the finish on plain OS engines, the castings need to be bead blasted. (Bit like a sandblaster but using small glass balls) If the very fine beads are used the finish is almost like the original. If a slight sheen is required, crushed walnut shells are supposed to be good.

Not got round to doing a painted C spec yet........

Pete

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05-09-2005 01:39 AM  12 years agoPost 9
Windspiel

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Massachusetts

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I would go with Peefor idea

Glass beading is the way to go I took mine to work and used a ultra fine bead and plug up any internal area , removed bearings it looked better than new
and the engine had caked on burnt Castor oil couldn't remove it with any chemicals

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05-09-2005 02:47 AM  12 years agoPost 10
jerrythercpilot

rrVeteran

--South Florida --

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If you have any casting discoloration, blast with fine (#120 or finer) grit before GB peen.

Light travels faster than sound, thats why some people appear so bright UNTIL you hear them speak.

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05-09-2005 04:45 AM  12 years agoPost 11
Ace Dude

rrProfessor

USA

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Wasn't there a product a few years back called "Deamon Clean" to clean engines? Is it still around?

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05-09-2005 02:38 PM  12 years agoPost 12
piroflip

rrApprentice

Northern England

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i agree with UK HELINUT on this one........

paint stripper is great at removing the most stubborn burned on castor

heli veteran of thirty years.......still learning!!!!!!

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05-09-2005 05:26 PM  12 years agoPost 13
Kenna

rrApprentice

Sweden

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I tried with an engine I wasn't to scared to misscolour, and also one pretty new Hatori 544 muffler.

A couple of spoon's with mashine dish wash powder in an old pot and boiled, used one old toothbrush to work a little on the stains, worked fine, but then I addes som more powder while still cooking and there was a beutifull camoflagepattern on one side of the engine afterwards..

Shouldn't have done that..

But to boil with some powder for a while and scrub gently with an old toothbrush should work fine..

But this I won't try it on my black OS91PS

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05-09-2005 06:43 PM  12 years agoPost 14
raptor50luvver

rrKey Veteran

Dorset UK

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Oven cleaner works every time,but as mentioned already Nitromoors does just as good,depends what you have lying in the cupboards i suppose...

i didnt ask it to do that!

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05-10-2005 12:45 PM  12 years agoPost 15
w.pasman

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Netherlands

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silver polish also works for the muffler.

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05-10-2005 02:24 PM  12 years agoPost 16
armageddon

rrVeteran

N. Y.

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Leave it on there.. It gives the engine character...

.

WHAT SIGNATURE?

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05-10-2005 02:36 PM  12 years agoPost 17
T.C.

rrKey Veteran

Nottingham. England.

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Heligoole,
i ran my 50 os in using castor(model;technics 16%)
Would that be the standard Model Technics 16% or the Bekra 16%.

Tony

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05-10-2005 04:36 PM  12 years agoPost 18
Chris Lupa

rrKey Veteran

Lancaster, UK

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I use fairy Powerspray, leave it on for an hour or so, wipe it off with warm water + Scoring pad, Job done

Sponsored by CSM and QuickUK

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05-10-2005 08:16 PM  12 years agoPost 19
heligoole

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yorkshire,uk

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TC it was superglow 16%model technics

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