Views: 32 Author: Site Editor Publish Time: 2024-04-10 Origin: Site
(1) Oil cooler
Possible locations: cracked cooler, loose inlet and outlet oil flanges, damaged gasket, and cracked cooler core.
Inspection method: When the diesel engine is running, the oil pressure is higher than the coolant pressure. If any of the above problems occur in the oil cooler, it will cause the oil to mix into the coolant. Open the radiator cap and you can see that there is oil in the coolant, and the coolant will overflow from the radiator.
(2) Intercooler
Analysis: If there is a leak in the intercooler, the coolant will leak into the intake pipe and flow into the cylinder, which will leak into the oil pan through the piston ring channel.
Inspection method: Remove the intercooler and check for any signs of coolant leakage into the intake pipe.
(3) Aging and damage of cylinder head sealing ring, damage of cylinder head gasket, cracks in cylinder head, cracks in cylinder head water chamber, and cracks in engine body (these issues can be solved by removing the oil pan and checking the pump pressure of the cooling system at 140Kpa)
Diesel oil leakage into engine oil: Diesel oil leaks into the oil pan from the piston ring (incomplete combustion in the cylinder, unburned fuel will leak into the oil pan. The above situation is caused by the failure of the piston ring seal, which leads to a decrease in compression ratio or fuel dripping from the injector); The increase in exhaust white smoke during the initial start-up every day is a sign of fuel injector leakage, which can also cause rough operation and reduced power of the diesel engine.