La Dilusion (pase de combustible Diesel por combustion incompleta al carter) origina desgaste y deposicion de carbono.

1. http://www.up.ac.za/academic/mae/research/design/diesel-lube1.pdf
DIESEL ENGINE FAILURES DUE TO FUEL WITH INSUFFICIENT LUBRICITY

5. Although the majority of soot produced during combustion exits
through the exhaust, some passes through the rings of the
combustion chamber and enters the engine oil. As long as these soot
particles remain suspended in the oil and are not allowed to
agglomerate they pose little risk to engine parts.

6. It is up to the motor oil’s dispersants to keep soot particles
dispersed. However, in high soot conditions, dispersants can
become quickly depleted. Once this happens the soot particles
rapidly agglomerate to form particles with diameters well over a
micron.

11. Effect of Soot
Agglomeration

12. Diesel Engine Car
IC: 3.0 MD: 75 DP: 75
Very high quantity of soot due to a
long draining period
Diesel Engine Car
IC: 0.5 MD: 28 DP: 36
Poor dispersancy due to a coolant
leak
Hydraulic Shovel
IC: 0.3 MD: 60 DP: 12
Feeble dispersancy; poor engine
cooling

13. Truck
IC: 1.1 MD: 85 DP: 16
The combustion is correct but the
disper-
sancy is slightly degrading due to oil
oxidation as the result of a tiring engine
Gas Engine
IC: 0.2 MD: 65 DP: 7
Poor dispersancy due to an extended
drain interval
Marine Diesel Engine
IC: 0.2 MD: 59 DP: 8
High lubricant contamination with
heavy fuel
Worksite Truck
IC: 0.8 MD: 95 DP: 4
Good combustion and good
dispersancy

21. CENTRIFUGE

22. CENTRIFUGE

26. K2 GS500 Right Piston
The right piston just removed during engine overhaul. Nice big carbon deposits here.

27. Figure 3. Valve
Figure 2. Valve
with severely
guttering or
recessed (worn)
torching
sealing face

28. Figure 4. Valve deck from a Caterpillar
3512TALE natural gas engine showing
very low to absent varnish and
sludge

29. Figure 5. Cylinder head from a Caterpillar 3512TALE
natural gas engine showing very low deposits
after 8,824 hours

30. Figure 7. Oil pan shows very low to absent
varnish and sludge

31. Figure 8. Piston undercrown shows
extremely low varnish deposits

32. Figure 9. Piston ring zone from a
Caterpillar 3512TALE natural gas engine
after 8,843 hours shows extremely low
carbon deposits.

33. Figure 10. Piston liner shows very low polishing