Diesel engine valve fault judgment

Huaquan power as a professional diesel generator supplier,teach everyone to judge method.
First,Foot valve is a kind of continuous rhythmic, "click" sound, like the coo of the idle speed, medium speed, sound clear, clear, high speed, noise, at the side of the valve chamber to listen to, the noise is more obvious, and the noise from the "fire" and the influence of the temperature of diesel engine. When inspection, remove the valve cover, first make the diesel engine idle running, listen to the sound valve and observe the influence of the lubricating oil splash. Found the valve after the foot ring, application of feeler check valve clearance, such as valve clearance is greater than the standard requirements, should readjust clearance range, after adjusting valve foot ring will disappear. If there is still a slight sound, also cannot adjust the valve clearance again to less than the specified value, otherwise will affect the normal diesel engine power.
Second, valve plunger ring is a sound similar to the small ball land on the SLATE "clicking" sound, hair ring parts in the side of the shaft. When the engine idle speed, noise, medium speed above noise reduced or disappeared. Check, remove the valve cover, with wire hook on the valve plunger adjustment screw, if the noise reduced or disappeared, then the valve plunger ring.
Third, the tapping of a valve spring break, usually of a soft valve springs or broken cause, the sound of it is a kind of "scrape" tapping. Diagnosis, the valve chamber cover will be removed, with auditory and visual inspection, if the multi-cylinder diesel engine, to find out which is the first cylinder valve work is not normal, and then use screwdriver don't live valve spring, if the noise disappear, shows that the cylinder valve spring soft or broken.
Four, valve seat ring loose tapping is caused by the following reasons: materials, heat deformation and loose after kuang, loose fit clearance correctly. Loose valve seat ring will issue a "scrape" tapping, the sound and the valve spring break sound similar, but than valve spring break sound a bit boring, if it is a multi-cylinder diesel engine, the available "cut-off" judging method, if the voice is not reduced during oil cut-off, sometimes more obvious, is the valve seat ring is loose, check the valve cover shall be removed, such as valve clearance is not big and spring didn't break, can conclude that the valve seat loose kuang percussion.