Hi guys. I have a Very used Bisson Pitts muffler for a Moki 180. The inside of the muffler is absolutely caked with oil. I'm afraid this is affecting the way the engine runs. What is the best way to completely clean out the inside of this type of muffler?

Thanks in advance!

Spence

I haven't tried this, but I think soaking your muffler in a crockpot with antifreeze should clean it very well, inside and out. It works wonders on engines!

cool - thanks. i will give it a try....

Ken6PPC is correct, but you must keep the crockpot at its lowest setting. Get it too hot and it will discolor the aluminum. At a low setting, it will do an amazing job of cleaning without any discoloration.

I have used the crockpot method several times for engines and mufflers. It'll make a blackened grundgy muffler look new.
Edwin

So, can I just use a pot over a gas stove with a very low heat setting?

If you do not live alone, it would be best to find a way to do it outside because 'cooking' antifreeze does not smell great to most people. Also, whatever container you use should never be used for food again.

Some of the "dollar" stores in my area sell crock pots for ten dollars or less. Sometimes I wonder why they call themselves "dollar" stores when so many items cost more than one dollar. Someone wrote in a similar thread that he saw one when passing a garage sale and actually got it for a dollar.

I wouldnt do that. Crock pots are pretty cheap. You can get them for $20 or less. And cook it in the garage or outside. The fumes would be hard to tolerate. I use a deep fry basket to hold the bigger parts and a metal tea thing-a-ma-gig for little bitty parts. I check them at 3 or 4 hour intervals. On stuff that is really stubborn, a little tooth brush scrubbing might be needed. No need to cook it over night. If you get it too hot, or cook it too long, the aluminum will turn a dark grey. Doesnt hurt anything, just discolored. The dirtiest muffler I had took about 10 hours total. I just checked it at about 4 hour intervals and rinsed it off every now and then and scrubbed a little. As far as I can tell, the NON-environmental anti-freeze works best. Others have tried the freindly stuff and said it didnt work. I dont know. The best use I get out of this process is cleaning 4-stroke heads. Once it loosens up all that carbon its easy to clean off and do a quickie valve job. Fixed a bunch of cantankerous old 4-strokes that way.
Edwin

thanks fellas!

or if you have a heated, automotive grade solvent tank and soaked it in that for a while, it does magic too. At least with caked on oil from Volkswagen valve covers it works well Would an ultrasonic cleaning machine work well? ya know- the kind used for cleaning jewelry. Just curious, Cory

I'm sure it would but a crock at the dollar store or Goodwill is as cheap as it gets also you want to cook the parts for long time at low heat so the crock makes the most sense
remember antifreeze is toxic so don't cook in the house breathing the vapors just means a slower death []

yea theres nothing like that sweet smell. Its to die for. The taste isnt all that great either

Antifreeze is very FLAMABLE. DO NOT HEAT OVER FLAME OR ELECTRIC STOVE. The vapors go down and if you are lucky enough to put out the flame on top you will find the inside of the stove on fire. My parts were clean including a Bisson muffler but the stove was ruined. If it hadent been for a large co2 extinguisher handy the house would have burned down. I set the heat low but it got to a simmer and ignited putting out a loud roar which got my attention just in time.
Ray