The 3 main bearing wear or failure (Dieselpartsworld) 2016-02-28    

The 40 reason engine burning oil "
The 3 main bearing wear or failure
The spindle bearing wear or failure will be thrown from the excess oil, and was thrown to the wall. With the increase of bearing wear, throw up more oil. For example, if the bearing clearance of 0.04 mm can provide normal lubrication and cooling function, if the bearing clearance can be maintained, is thrown out of the oil volume is normal, and the bearing can not be damaged. When the gap increased to 0.08 mm, throw out the amount of oil is five times the normal amount. If the gap is increased to 0.16 mm, throw out the amount of oil is 25 times the normal amount. If the main bearing throw too much oil, cylinder will splash more, so that the piston and the piston ring can not effectively control. This will lead to burning oil or piston and piston ring of carbon deposit. Usually, if the oil in the main bearing excessive loss of, the connecting rod bearings will be short of oil, resulting in some low speed, lack of oil splashing onto the wall, resulting in piston and piston ring wear, no oil in the engine is running at high speed. So the main bearing wear is the consequence of high oil consumption.
The 4 connecting rod bearing wear or damage
The influence of the connecting rod bearing clearance on the main bearing oil and the like. In addition, the oil more directly thrown into the wall. Wear or damage of the connecting rod bearing lead thrown onto the wall of the oil too much, lead to the design to control normal oil amount of the piston and the piston ring can not effectively control the oil, so that the excess oil into the combustion chamber to burn, oil consumption is high.
Note - bearing clearance is inadequate not only lead to its wear will lead to wear and piston, piston ring and cylinder wall.