The main engine trouble

Signs of the major engine malfunction are: the fall of power, increased oil consumption, smoke production, decrease the pressure end of compression (compression), knocking in the engine. Engine power is reduced, and the consumption of gasoline increased by: failure of supply systems, ignition systems, the accumulation of soot on the walls of the combustion chamber, the presence of scum and dirt in the cooling system, incorrect adjustment timing, lack of compression in the cylinders of the engine, the air passes through the sealing inlet system. Increased oil consumption (carbon monoxide) and smoke release observed during wear and breakage of piston rings, loss of elasticity, wear grooves for piston rings, worn and damaged liners, suction of oil through the gaps between the rods and valve guide bushings, crankshaft seal breaches and failures crankcase ventilation system. Opacity issue depends mainly on the technical state of fuel equipment. Pressure at the end of the compression stroke (compression) may be reduced during wear of piston rings and cylinder liners, valve gapping to their saddles, worn valve guides, the weakening of puffs, nuts cylinder head, cylinder head gasket is damaged, abuse clearances in the valve mechanism. Pinking appear at break valve springs and valves, is binding, a bully on the surfaces of liners and pistons, larger gaps between the valve stem and socks, rockers, worn piston pins and holes for them in the piston bosses and bushings in the upper heads of the connecting rods, connecting rod wear and indigenous bearings. To troubleshoot the engine was removed deposits, regulate the gaps, as well as replace individual parts. Elevated pass gas piston rings, the pressure drop the oil is below normal, knocking in the engine points to the need of repair. On the need to disassemble the unit or unit should be based on a preliminary examination or diagnosis. Technical condition of the engine is determined based on data on the run from the beginning of operation or after maintenance, driver information about the engine, checking tightness of connections, release smoke, knocking and noise, the stability of the engine in various modes, the power and economic performance in the test car's parameters stand with roller dynamometer. Diagnosing technical condition of the engine includes verification of: pressure at the end of the compression stroke compressor, the technical condition of the cylinder-piston group of a special device, the amount of gases, erupting into the crankcase, gas meter, oil pressure in the lubrication system at the sign; inlet depression vacuum gauge, knock with a stethoscope. Listen to the engine at its idling after heating to a temperature of 70-85 degrees.