①Install the Bitzer HE piston in the correct direction;

②Air ring opening position requirements: the first opening should avoid the side with high pressure on the Bitzer HE piston side and the direction of the piston pin (45° to the direction of the piston pin, and the second and first openings are staggered by 180°;

③Requirements for the opening positions of the two oil scrapers in the oil ring: mutually staggered by 180°;

④The connecting rod bearing cover should be tightened twice according to the specified torque, the specified torque is 30N·m

If the Bitzer HE piston is improperly installed or the sealing is not good, it will cause the oil on the cylinder wall to go up to the combustion chamber and burn with the mixture, causing oil burning. If the fitting clearance between Bitzer HE piston and cylinder wall is too small or the piston ring gets stuck in the ring groove due to carbon deposits, etc., Bitzer HE piston may scratch the cylinder wall when it moves up and down. Deep grooves are formed on the cylinder wall, which is the phenomenon of "cylinder pulling". The cylinder wall has grooves and poor sealing performance, which will also cause oil burning. Therefore, the working status of Bitzer HE piston should be checked regularly to avoid the occurrence of the above two situations and ensure that the engine is running in good condition.