What should I do if an abnormal sound occurs in a diesel engine?

Classification:

Company News

Release time:

2019-08-22

【Summary Description】 What should I do if an abnormal sound occurs in a diesel engine?

1. When the front side of the engine and the timing gear chamber emit rhythmicThe sound of "crashing, crashing" is louder when running at low speed. This is caused by the excessive wear gap between the timing gear shaft and the shaft sleeve; when the diesel engine is idling, there is no rhythm at the timing gear chamber and on the side of the camshaft. The "gallop, gallop" sound is more prominent at low and medium speeds, and becomes messy and broken at high speeds. If the noise increases under heavy load, this is because the timing gear meshing gap is too large, the knocking sound caused by the tooth surfaces hitting each other, or the wear of the shaft sleeve causing the two gears to mesh abnormally; the diesel engine produces violent vibration sound during operation and is difficult to operate.

This is caused by the wrong timing gear mark, or the wrong weight of the balance weight, or the serious wear of the balance shaft bearing.

2. In additionSour at cylinder headThe sound of "Cha, Cha, Cha" is accompanied by the sound of "hush, hush, hush". When the engine is about to stall, the sound is more obvious. This is between the seat ring, valve and cylinder head after the valve seat ring is loose. The impact sound; in the upper part of the engine near the injector, you hear the crisp and heavier "dang, dang" impact sound, which changes with the speed, and the start and combustion are not normal, which may be caused by the vortex chamber insert falling;Diesel engineAt the outer cover of the valve chamber, there is a "chacha" sound like a broken tile, or a collision sound like two springs. At the same time, the exhaust pipe intermittently emits an explosion sound, the diesel engine is unstable, and black smoke is emitted. This is caused by the broken valve spring;

WhenDiesel engineThe joint between the cylinder head and the body, if the rough and sharpThe sound of "hush, hush, hush", accompanied by blow-by and smoke, is caused by the cylinder head gasket being washed out; if the sound of "hush, hush, hush" is heard at the air filter, and the diesel engine It is difficult to start or run for a period of time after starting and feels hot by touching the intake pipe with your hands. Most of these are caused by valve burning (corrosion), carbon deposits, lax sealing, and air leakage; when the engine is running, it makes a low "clanging, clanging" and "creaking, creaking" sound, which is much louder than the noise with excessive clearance of the main bearing, especially when the speed changes suddenly, which is caused by the loosening of the flywheel fastening nut.

Key words:

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