What are the causes of blue and white smoke from excavator engines？

Excavator engines white smoke failure cause analysis:

1, because the engine temperature is not enough, the cylinder, air and fuel in formation of the mixed gas, some can not burn, so the exhaust pipe take white smoke.

2, drivers engine contains moisture affect drivers mixed gas burning white smoke.

3, if the exhaust pipe to take white smoke may be an individual cylinder cylinder head, cylinder pad water damaged, should remove the inspection, replacement of the damaged cylinder head, cylinder pad. In addition, the inlet valve closed lax, also can appear white smoke, should be check and repair.

the problem analysis:

Blue smoke coming drivers engine, mainly caused by burning oil.

1, air filter, oil too much. Too much oil in the air filter oil dish, in the case of a hot car, engine oil is thinning, easy to into the combustion in cylinder, the engine emit blue smoke, the piston ring to the oil pan oil level of the oil level of no more than ring groove.

2, inside the oil sump oil too much. Within the oil sump oil too much, and gradually to the cylinder walls of oil also increases accordingly, part of the oil from the aperture of piston ring, crowded into the combustion chamber combustion, produce the blue smoke. So the oil inside the oil pan, shall not exceed the oil gauge on line.

After 3, piston ring counterpart, or wear and cylinder liner clearance is too large, piston rings were carbon deposit cementation counterpart, cylinder wall shave oil can't; Wear piston ring and cylinder liner clearance is too large, reduces the oil scraper ability of the oil is up, can cause cylinder liner blue smoke coming exhaust pipe, serious when still can drain the oil.

4, cylinder liner and piston set after running-in is bad new or overhaul locomotives, cylinder and piston, piston ring without good running-in, due to the piston ring at the beginning of the work can't can't scrape cylinder walls of oil, will also take a blue smoke. But after a period of time after running-in, can eliminate itself.

In addition, the piston ring cone upside excavator maintenance, valve guide and wear was burning oil and blue smoke phenomenon, must replace the piston ring or replace the catheter.