Excuse me, the diesel engine with a displacement of 2.8 and a turbocharger, Ruifeng, emits blue smoke. What is the reason? Solve. I would like to ask what is the reason why the diesel engine with a displacement of 2.8 and a turbocharger, Ruifeng (Check Transaction Price | Detailed Model), emits blue smoke. Solve. Hurry up and check and troubleshoot! Blue smoke should be burning oil, check the supercharger and engine ★ Check whether the oil level in the oil pan is excessive. Because the crankshaft rotates at high speed, the oil will splash on the cylinder wall and escape into the combustion chamber. It is worth noting that when checking that the oil level is too high, you must not pull out the oil dipstick to check immediately after the engine stops working, because the lubricating oil splashed on the crankcase wall has not yet flowed back, so you must stop the engine for 10 minutes before pulling out the oil dipstick. ★ Check the condition of cylinder liners, pistons and piston rings. If the wear is serious and the gap is too large, causing oil to escape outside the combustion chamber for combustion, and accompanied by an increase in engine crankcase exhaust gas, the worn piston should be replaced in time. The piston rings lose their function, a large amount of engine oil flows up to the combustion chamber for combustion, and blue smoke is emitted. The piston rings should be removed, the carbon deposits should be removed, and each piston ring should be assembled correctly. If necessary, replace the piston rings. For new cars or cars that have just been overhauled, the lubricating oil will generally not leak due to the excessive clearance between the piston and the cylinder. It is often the inner and outer notches (or corners) of the piston ring that cause the lubricating oil to escape, so you should pay attention to check. ★ The gap between the valve and the valve guide is too large, and a large amount of engine oil is sucked into the combustion chamber for combustion. The worn valve and valve guide should be replaced. For a turbocharged engine, if there is oil burning and blue exhaust smoke, but the engine power does not decrease, and organic oil stains can be seen adhering to the compressed air outlet or on the intake hose, it can be basically determined that it is a turbine. Supercharger leaks oil. The engine oil enters the combustion chamber with the air flow and is burned. At this time, the supercharger should be replaced. The lubricating oil should also be checked to see if it is contaminated and replaced if necessary. ★ Check whether the air filter is clogged. A clogged air filter will increase the resistance during the cylinder's air intake process and result in poor air intake. There is a certain negative pressure in the cylinder, which will also suck lubricating oil into the combustion chamber. Therefore, when blue smoke appears, the filter should also be checked and cleaned. I hope it can help you. Please set the best answer. Generally, blue smoke from an engine means oil has entered the combustion chamber. It may be due to the piston replacement, or it may come from the valve. If the cylinder gasket leaks oil, it will also cause blue smoke @2019< /p>
1. The relationship between abnormal noise and engine speed. The existence of most common abnormal noises in engines depends on the engine speed state. 1. Abnormal noise only exists when idling or running at low speed. The reasons for the sound include: too large clearance between the piston and the cylinder wall; too tight assembly of the piston pin or too tight assembly of the connecting rod bearing; too large clearance between the tappet and its guide hole; wear of the valve cam profile; sometimes, the starter catch is loose and the pulley is damaged. Squeaking (apparent when RPM changes). 2. The sound is chaotic when maintaining a certain speed, and short-term sounds are made one after another when decelerating rapidly. Reasons for the sound include: the camshaft timing gear is cracked or its fixing nut is loose; the crankshaft is broken; the piston pin bushing is loose; the camshaft axial clearance is too large or its bushing is loose. 3. Abnormal noise occurs when the engine accelerates rapidly.The sound still exists when running at high speed. The reasons for the sound are: the connecting rod bearing is loose, the bearing bush is burned, or the size does not match and rotates; the crankshaft bearing is loose or the bearing bush is burned; the piston pin is broken; the crankshaft is broken. 2. The relationship between abnormal noise and engine parts. When abnormal noise occurs in the engine, it will inevitably produce a certain degree of vibration. The characteristics and location of the vibration can assist in diagnosing the cause of the abnormal noise.