cam shaft bearing wear or damage (Dieselpartsworld) 2016-02-28    

The 40 reason engine burning oil "
5 cam shaft bearing wear or damage
Camshaft bearing is lubricated by pressure, if the gap is too large, excessive oil leakage. The leakage of the oil immersion valve guides and valve rod, resulting in increased oil consumption.
6 crankshaft wear
Crankshaft wear will affect oil and bearing wear the same. When the wear loss of a round, round them with the gap between the bearings will be uneven. Loss of gap size circular Crankshaft between the bearing and the change in the rotation, will throw more oil. Out of round bearings require re grinding, bearing and use smaller size matched.
7 cylinder tapered or out of round
For ground into a slight taper and round loss (cylindricity and concentricity decreased) cylinder, oil consumption can be controlled by the piston and piston ring. However, with the increase of the cylinder taper and out of round degree, to control oil consumption is becoming more and more difficult. It is composed of many factors together led to the results. With the clearance between the piston and the cylinder increases, will cause the piston when running the inclined swing swing; instantaneous, will lead to retention of excess oil on one side of the piston, the same situation also appears in the piston ring. So, with the constant piston reciprocating swing movement, there will be some of the oil into the combustion chamber. The crankshaft rotates a circle, and completed the two stroke piston. When the engine is in 3000rpm (about 60 miles per hour) when running, running in the deformation of the piston ring cylinder will be under changes in the size and shape of the 6000 times / min. The results, in the high-speed operation, may not be able to adjust itself with the clearance of cylinder piston ring (especially when running to the cylinder liner wear parts, caused by clearance is too large). Therefore, as long as the above happens, it will lead to the oil consumption of the engine is too high.