Engine slobbering, oil and residue coming out of stack

A dark and heavy residue emitted around exhaust manifold gaskets on diesel engines. The operator can help eliminate the residue by avoiding unnecessary engine idling. "Diesel slobber" or "slobber" consists of diesel fuel and/or crankcase oil which has passed through the combustion chamber and did not burn. These are the "heavies" that did not burn because cylinders temperature are too low to promote complete burning.
The lower temperature occurs at:

• Start up while engine temperature increases.
• Engine is idled for a prolonged period.

Small amounts of crankcase oil can find their way past the piston rings and valve guides in a new engine or in a "cold" engine while idling. The unburned crankcase oil mixes with the unburned fuel to create the "slobber". In addition to the "slobber" you can see, there is an unseen amount of unburned fuel washing down the cylinder walls. This unburned fuel:

• Forms gummy deposits on valves, pistons and piston rings.
• Dilutes crankcase oil.
• Accumulates sludge throughout exhaust system.

444J Loader Excessive Blow-by

This is a rarely seen problem but one that if you find can save you lots of hours in labor. A 444J Loader has a bad turbo. Leaks oil terribly out of the exhaust, upon removal and inspection of the turbo it is found that the turbine wheel and compressor wheel are fine, the only thing wrong with the turbo is that it blew seals. Put the new turbo on and it is now pushing oil out of the dipstick tube. After running compression tests on the engine, all the cylinders turn out to be in great shape. The problem is that on the crankcase vent tube there is a blockage. In our case it was a chunk of ice. When that ice is removed life goes back to normal. Like I said it is rarely seen but it will save you lots of man hours trying to find a ghost problem.