The function of oil is to ensure that the piston, piston ring and cylinder wall have good lubrication. When the engine is working, the oil must be consumed, make wall attached with a layer of oil by spray method, because the oil scraper piston ring Co., remaining in the cylinder wall oil at high temperature under the action of gas, some were burning, some together with exhaust gas discharge or deposit formation in the cylinder parts, when the engine temperature is too high also, part of the oil evaporation and is discharged to the outside of a crankcase. In the engine technical condition is good, the consumption is relatively small, generally not more than 0.5% fuel consumption, but when the technical condition of the engine with the use of time and the variation of oil consumption will increase. An increase in engine oil consumption marks a decline in engine performance.
The reason
The gas is discharged from the vent pipe to the atmosphere.
Oil cooler leakage.
The clearance between the piston and the cylinder wall is too large.
Piston ring, or stuck in the ring groove lost elasticity.
The twist ring or the conical ring is installed to reverse the oil scraping performance, and the oil is pumped into the combustion chamber.
The valve seal damage.
7 Baotou beiben heavy truck parts of turbocharger oil seal failure.
The crankshaft oil seal oil.
9 and crankcase gasket leakage of oil.
The air compressor oil channeling.
The diagnosis and treatment methods
First of all, should check the cylinder block joint and oil pipe joints and other parts of the oil leakage trace, whether the seal before and after the crankshaft seal. If found in the oil pan and the combination of the surface of the crankcase oil seepage, and the oil pan screw fastening, gasket is good, then the crankcase pressure is too high.
The dipstick out, if the feeling from the dipstick hole of the crankcase pressure is too high, can be considered a crankcase ventilation device must be blocked, dredge.
If you check out the Baotou North heavy truck parts crankshaft oil seal before and after serious oil leakage, should be timely maintenance. If it is only oil, can still be used for the time being, to be excluded when the two maintenance, but should pay attention to the use of oil surface height.
If there is a lot of oil in the discharge valve of the air cylinder, the air compressor oil. We should check the air compressor piston, piston ring and cylinder wall wear is too much, and repair.
If the engine exhaust take the blue smoke, the oil is sucked into the cylinder combustion exhaust. Should first check whether there is oil in the intake pipe, if there is oil on the turbocharger seal damage, oil flow into the airway shaft, the need to replace the sealing ring.
The check valve seal is intact, the intake valve rod and the catheter with the gap is too large, and given the replacement and maintenance.
If the above examinations were good, and then remove the Baotou beiben heavy truck parts of cylinder head and oil pan, to conduct a comprehensive inspection of measuring cylinder, piston, piston ring, in order to remove the fault.
Whether there is oil, and check the coolant in a cylinder or cylinder cover is a cylinder pad oil cracking, damage or damage to the oil into the oil cooler, the cooling liquid should find the corresponding reason, to repair damaged parts.