Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


This OKAY for engine cleaning Cox_ba12




This OKAY for engine cleaning Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Fuel residue stain clening help
by akjgardner Today at 7:53 pm

» my attempt at making an exhaust throttle for Cox .049
by roddie Today at 7:00 pm

» Anderson Baby Spitfire - looking for the aft tank and gasket
by dan vincent Today at 6:15 pm

» Another of C.T. engines cleaned ---- Cox Tee Dee .09 --- Just today (3/26/2024) more Cox parts
by sosam117 Today at 5:55 pm

» Cox powered boat litle shrimp hidroplane
by davidll1984 Today at 2:52 pm

» Introducing the new - "QZ" RR-1
by roddie Today at 1:08 pm

» STUKA bomb dimentions needed
by latole Today at 9:36 am

» Indexing COX cylinders
by davidll1984 Today at 7:56 am

» Introducing our Cox .049 TD Engines
by Yabby Today at 6:33 am

» 1/2a Skyray plans?
by 944_Jim Yesterday at 10:14 pm

» Postage stamp backplates
by JPvelo Yesterday at 8:52 pm

» Cosmic Winds, - Big Guy, Little Guys, Silver Guy and Wounded Guy.
by rsv1cox Yesterday at 5:18 pm

Cox Engine of The Month
March-2024
balogh's

"COX Budapest" .049 engine



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


This OKAY for engine cleaning Empty
Live on Patrol


This OKAY for engine cleaning

Go down

This OKAY for engine cleaning Empty This OKAY for engine cleaning

Post  VUgearhead Sun Jul 14, 2013 6:28 pm

I picked up a pint of this all purpose paint stripper at HD. Ingredients list includes Acetone, Methanol and xylene and toluene. It's probably okay for the metal parts, but what about the plastic ones (tank backs, NVA's, etc.).

Thanks
VUgearhead
VUgearhead
Gold Member
Gold Member

Posts : 155
Join date : 2013-07-02
Age : 56
Location : Boynton Beach, FL

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  jsesere Sun Jul 14, 2013 6:53 pm

No use denatured alcohol or fuel and a toothbrush to clean all parts.
jsesere
jsesere
Rest In Peace
Rest In Peace

Posts : 1606
Join date : 2010-09-05
Location : Salem Oregon

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  RknRusty Sun Jul 14, 2013 7:35 pm

That's some mean stuff you bought, but it will definitely melt plastic. I agree, denatured alcohol is cheap, safe and easy.

_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!


My Hot Rock & Blues Playlist
RknRusty
RknRusty
Rest In Peace
Rest In Peace

Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  batjac Sun Jul 14, 2013 8:43 pm

I do it the old fashioned way.  I just toss the parts, or the whole engine if it's too gummed up to disassemble, into a glass jar with some glow fuel.  Let it sit for a couple of hours and then disassemble and clean.  If it's not cooperating, let it sit for a couple more hours.  I know the glow fuel won't eat the plastic, and it's never failed me yet to get the engines to turn free and shine up if I use a tooth brush.

The Olden Days Mark
batjac
batjac
Diamond Member
Diamond Member

2022 Supporter

2023 Supporter

Posts : 2332
Join date : 2013-05-22
Age : 60
Location : Broken Arrow, OK, USA

Back to top Go down

This OKAY for engine cleaning Empty This OKAY for engine cleaning

Post  VUgearhead Fri Jul 26, 2013 10:44 am

Thanks everyone for the helpful suggestions. I ended up returning the over-the-top paint stripper for simple denatured alcohol. Left it to soak over a long weekend (4 days).

When we returned, my son and I spent some quality time on the back porch cleaning up the parts and re-assembling. The alky worked great! It's a nice older Medallion .049 with throttle ring and now that it's cleaned up and well lubed, compression and hand turnover feel really good. I'm a little concerned about the amount of slop in the crank/drivenut play (I don't think I have the drivenut fully seated). I pushed it on by simply screwing in the prop screw with a prop on.

Any suggestions for a better way?

Next up, building the ultimate test stand, thanks to bernie at Cox Int.!
VUgearhead
VUgearhead
Gold Member
Gold Member

Posts : 155
Join date : 2013-07-02
Age : 56
Location : Boynton Beach, FL

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  jsesere Fri Jul 26, 2013 10:53 am

Did it have one of these? Even then sometimes due to wear or poor prodution quality you may not be able to get it to seat properly.
http://www.ebay.com/itm/3x-Cox-049-051-Tee-Dee-Model-Engine-Thrust-Washer-049-051-Phenolic-/390370583268?pt=Radio_Control_Parts_Accessories&hash=item5ae3e662e4
jsesere
jsesere
Rest In Peace
Rest In Peace

Posts : 1606
Join date : 2010-09-05
Location : Salem Oregon

Back to top Go down

This OKAY for engine cleaning Empty This OKAY for engine cleaning

Post  VUgearhead Fri Jul 26, 2013 11:29 am

No, no thrust washer. I didn't think Medallion engines ever had these as a standard part. I may end up getting some of these, but I don't really use electric starters.
 
I have seen someone on the online auction house shilling a tool for setting the driveplate. It just looks like a prop screw with a second nut for tightening it down onto the crank, but I'm not sure how it holds the crank firm to keep it from spinning backwards.
 
I have a newer medallion .049 with a throttle muffler, rather than the throttle ring. It has a lot less play, but there is still some (no thrust washer there, either).
VUgearhead
VUgearhead
Gold Member
Gold Member

Posts : 155
Join date : 2013-07-02
Age : 56
Location : Boynton Beach, FL

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  jsesere Fri Jul 26, 2013 12:03 pm

The washer is just a easy fix if it is really needed. There should be a little play up front. . The piston is held in place by placing a Cox tool in the exhaust port to keep it from moving. The tool you are takling about in my opinion is not really needed A Cox tool, prop, washer and screw will do the same thing for free. Same with the Cox drive plate remover. One can be made from parts from a hardware store for a fraction of the cost. A good tool to have is a Cox piston reset tool. They are worth every penny.
jsesere
jsesere
Rest In Peace
Rest In Peace

Posts : 1606
Join date : 2010-09-05
Location : Salem Oregon

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  VUgearhead Fri Jul 26, 2013 2:57 pm

Thanks, batjac. I have the reset tool for both my 049's and my 020.

As for the Cox tool in the exhaust port to hold the crank still, I'd be afraid of warping or damaging the piston skirt this way. I havent tried adding any washers in with the prop. Maybe I'm bottoming out the prop screw in the crank. I'll have to give that a try.
VUgearhead
VUgearhead
Gold Member
Gold Member

Posts : 155
Join date : 2013-07-02
Age : 56
Location : Boynton Beach, FL

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  jsesere Fri Jul 26, 2013 3:01 pm

Then use a shaved down popsicle stick.
jsesere
jsesere
Rest In Peace
Rest In Peace

Posts : 1606
Join date : 2010-09-05
Location : Salem Oregon

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  dinsdale Sat Jul 27, 2013 6:03 am

VUgearhead wrote:Thanks, batjac. I have the reset tool for both my 049's and my 020.

As for the Cox tool in the exhaust port to hold the crank still, I'd be afraid of warping or damaging the piston skirt this way. I havent tried adding any washers in with the prop. Maybe I'm bottoming out the prop screw in the crank. I'll have to give that a try.
I've never actually done this, but surely the tool in the exhaust port rests on the piston crown.  By ensuring that the tool goes all the way through and out the other side would keep it flat and ensure no damage to the piston. You'd surely have some serious SPI if you could get a tool in the port and underneath the piston.
dinsdale
dinsdale
Account Deactivated by Owner

Posts : 317
Join date : 2012-02-22

Back to top Go down

This OKAY for engine cleaning Empty Re: This OKAY for engine cleaning

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum