Removing carbon

**Cribbs74** Mon Aug 12, 2013 12:39 pm

I have looked, but do not see any posts about removing burnt castor on the external engine. I have a couple engines (non Cox) that have been really hot and the Castor has burnt into a hard Carbon around the head and cylinder. So far I have been soaking in alcohol and scraping (carefully) with a dental pick. This works, but is very tedious and time consuming. Is there a chemical that is engine safe that will dissolve the carbon?

Ron

duke.johnson Mon Aug 12, 2013 1:11 pm

I've always heard, a old (not for food) crock pot with the old green glycol anti freeze and heat it up. and leave it a day or two. I'm going to try it soon.

dckrsn Mon Aug 12, 2013 1:29 pm

Ron, on older and bigger non-Cox engines I use a small brass wire brush.
After a long soak in Hoppe's #9, I brush all the unfinished
cast surfaces. That's just about the whole exterior on an
older engine. Cleans them like new.
Don't know what it might do to a machined surface.
Bob

http://www.grainger.com/Grainger/TOUGH-GUY-Wire-Brush-10D449?Pid=search
Removing carbon Brush10

SuperDave Mon Aug 12, 2013 2:11 pm

Bob mentioned the Hoppe's #9 Gun Cleaning solvent for such cleaning tasks!

(I have said that so many times that I've grown weary of mentioning it.) Laughing

SD

dckrsn Mon Aug 12, 2013 2:17 pm

Makes a great dessert topping too.

**Cribbs74** Mon Aug 12, 2013 2:44 pm

Lol, you guys are funny. Hoppes makes a little bit of sense as it cleans carbon off of guns.

I suppose I could break down and buy some. The carbon is localized to the external head and crankcase. The internals look pretty. OS FP.40

Ron

SuperDave Mon Aug 12, 2013 4:25 pm

And it could be used as a laxative also. Laughing

It would FLUSH you right out!

SD

dckrsn Mon Aug 12, 2013 6:14 pm

SuperDave wrote: And it could be used as a laxative also. It would FLUSH you right out!
SD

Carbon and all! Embarassed

Bob

andrew Mon Aug 12, 2013 8:51 pm

duke.johnson wrote:I've always heard, a old (not for food) crock pot with the old green glycol anti freeze and heat it up. and leave it a day or two. I'm going to try it soon.

+1

It can really work wonders, but if you leave it for too long, it will dis-color some aluminum. Clean-up is with a toothbrush and soapy water, but be sure to oil well immediately after cleaning.

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