OK....we need some creative thinking. There is alot of talk on these Diesel machines about carbon that is baked on and so tough it can hold the rings taut and so cause low compression. Valve seats are described as having carbon buildup that is stubborn enough to prevent closure and sealing.

Is there any ultrasound tool that works here?? Is MMM the best chemical known to dissolve this pest?? Can a miniature pneumatic drill be employed to do cleanup??

Baked on carbon must be hard but also is brittle.

Any unconventional tricks out there and does Cummins or MB have any R&D budget to study this. Has any work been done to solve this.

If not then there is a tool that if designed and if it works will make someone a few million......

__________________
Dionysius

Italian tuneup.

I've used ATF several times. Let it soak in the cylinder overnight then fire it up. It only worked for me once. No, I didn't buy a lottery ticket after that. Should have though....

__________________
Steve S
Support Tech
UnwiredTools, LLC
www.unwiredtools.com

1982 380SLC
1994 E320TE
1998 E300DT

You can try this. Believe it or not, this will do some good for the piston rings at least. Start your engine and let it warm up to normal operating temperature. Either jamb your throttle open to hold the engine at about 2500 to 3000 rpm MAX or have a friend help you do this.

Take a plastic bottle, like a milk jug and drill a 1/8th to 3/16 hole in it. Fill it with water and with your air cleaner removed direct the stream of water into the throat of the intake, but DO NOT stall the engine by flooding it out with water.

This will help remove built up carbon in the rings and ring grooves. Running biodiesel will also help remove the carbon too as Biodiesel will burn a lot cleaner, is a superior lubricant to Fossil fuel and it breaks up carbon well. Your cylinders will look clean by comparison when side by side with regular diesel. One of the previous posts had suggested Automatic Transmission Fluid. I have never tried this, but it is a pure detergent and as long as you drain most of it out, this could work. Detergents like ATF will help break up and dissolve carbon.

Using a spray bottle is a much better option to prevent a liquid stream from entering the engine.

What problem are you trying to solve?

Usualy only engines that run under light load, IE lots of idling experiance bad carbon build up.

With normal driving you will never see a lot of carbon build up, unless you play the lets see what these will burn game.

The worst case I ever saw was on a Hattares 46 with a pair of Detroits, think they were 8V92's. Anyway the PO ran the thing at idle between two bridges in FL for the first 12 years of the boats life never getting on plane just trolling. New owner buys it and actualy runs it, half way up the coast the port engine eats a turbo. They were so full of carbon the mechanic was amazed that they ran, had to do majors on both of them.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

That's why I recommended a small hole in a milk jug. You want to have some water entering the engine and at 2500 RPM, a 1/8th stream should be just fine. I'm not sure a spray bottle would direct enough into the motor to do much good. It will cough and fart until the water's gone and you'll see some interesting crud coming out the back though!

There is some solvent that is generally made for marine use, since these engines usually sit for several months at a time. I'll see if I can find out what the name of it is. You simply put a little in the cylinder and let it sit overnight (without reinserting the glow plug.) Turn it over to remove the excess fluid, reinstall the glow plug and you're done. It worked pretty well on an engine that I got that had sat for over 5 years.

__________________
87 300SDL - 215K Miles !!
99 F-350CC Dually PSD - 190K
86 300SDL - 189K
All on B-100

Delco X-66 de-carbonizing agent
http://www.peachparts.com/shopforum/showthread.php?t=19836









Have a great day.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

I read the thread and am neither for or against it; but did anone use in with success in a diesel yet? If so I did not see or missed that part in the thread.

__________________
84 300D, 82 Volvo 244Gl Diesel