The best way to clean carbon build-up out of your engine is NOT to take the car out and run it as hard as you can. This only results in meetings with local law enforcement personnel, and doesn't do much for cleaning out carbon.
If you really want to clean the carbon out of your engine follow these simple steps. Fill an empty soda bottle with water. Remove your air cleaner. Start your engine. While using one hand to control the throttle, trickle the water into the carb or throttle body with the other while holding your thumb over the bottle opening. Keep the engine rpm's up so that the engine doesn't die. Make sure that you don't pour the water in too fast! Water doesn't compress and if you pour too much water in, severe engine damage can result! White smoke from the exhaust is normal. If you have a port fuel injected car, you obviously won't be able to use this method, but I have had success with connecting a vacuum hose to a port at the base of the throttle body and sticking the other end of the hose into the bottle of water. The vacuum of the engine will suck the water in, creating the same effect. This will clean out even the most stubborn carbon, by 'steam cleaning' your cylinders.
Here is another:
on the subject of carbon cleaning, GM top eng cleaner works well. On cars, I feed some into a warm idling engine either thru the carb or a manifold vac source until the motor runs very rough or stalls. This coats the valves with the cleaner. Then I pull the plugs, and drizzle some onto the pistons. Let it sit till the engine cools. Cover the plug holes with a rag, and spin the engine over, expelling a nasty blast of top engine cleaner and carbon. Re install the plug and fire up. Away you go in a cloud of smoke, decarboned for the time being. Has never failed, at least to amuse me when I road test afterwards and blow out all the carbon and cleaner.
I've already given you too much to read, but seriously, there are ways to fix this problem without removing the engine. Heck, the water treatment is free. However, you would really have to trickle it in. Remember, water doesn't compress. If you put too much in, you could bend a rod or create other internal damage.
Go on the internet and google search Engine Carbon Cleaners. There are a lot of them that are available. I'm not allowed to recommend products by name, but there are many out there. It's worth a try. A friend of mine has a product he uses in his shop. THe product is actually set up like an I.V. At the hospital. It is run through a vacuum hose like the brake booster hose and slowly the engine sucks it in. You can't believe the black smoke that comes out of the tail pipe. It's unreal! Check it out. I know they are out there.
LEt me know if you find anything to try and if it helps, or if you have other questions.
Tuesday, September 29th, 2009 AT 9:42 PM