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 increased oil consumption 
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1. Flow of oil through the engine seals .................
............... Tighten krrepleniya and, if necessary,
replace gaskets or seals
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2. Clogging of the crankcase ventilation system ..................
............... Clean the ventilation system
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3. Wear of piston rings .................................
............... Replace worn-out ring
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4. Excessive wear of pistons and piston skirts groove .....
............... Replace the piston
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5. Excessive wear in the engine cylinder ..................
............... Replace sleeves, pistons and rings
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6. The occurrence of the piston ring grooves in the pistons ..........
............... Loosen the ring and clean the grooves of pistons
of carbon
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7. Breakage of piston rings ...............................
............... Replace rings
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8. Slots in the coking valve stem grooves .......
............... Clean cuts from scale
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9. Excessive wear of valves rods ....................
............... Replace valves and rubber seals
Ring
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10. Excessive wear valve guides ........
............... Perform repair cylinder heads,
Replace the sleeve valve
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 knocking of the engine crankshaft 
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Knocking of the engine crankshaft is deaf metal
tone, whose frequency increases with increasing frequency
engine speed. Excessive axial clearance
crankshaft of the engine noise is more dramatic tone
with irregular intervals, especially noticeable with smooth
accelerating or decelerating.
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1. Excessively early ignition timing .......
............... Adjust the ignition timing
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2. Work at an inappropriate oil .....................
............... Change the oil
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3. Not enough pressure and oil flow .................
............... Check operation of oil pump and
reducing valve, if necessary, correct
faulty pump and relief valve. Check
The gap between the main and connecting rod journals and
relevant inserts. Check whether the channels are not blocked
lubrication system
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4. Excessive clearance between the liner and the journals of indigenous
bearings ..............................................
............... Remove the engine crankshaft, inspect
and measure the ear and neck of main bearings, proshlifuyte
neck and, if necessary, replace the liner
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5. Eccentricity and ovality of indigenous journals .............
............... Remove the crankshaft, check the diameter
Alignment and indigenous journals, proshlifuyte them and replace liners
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6. Excessive clearance in the thrust washers .....................
............... Check the gap and replace the thrust washers
with the new thicker
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7. The weakening of the bolts attaching the flywheel to
crankshaft .........................................
............... Tighten the recommended torque
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connecting rod bearing knock  
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Knocking rods has a sharp, metallic tone than
knocking main bearings. Knocking is usually seen at work
the engine idling in neutral position of the lever
shifting and increases with increasing frequency
engine speed. Knocking rods can be easily
define, disabling one by one spark plug.
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1. Work at no relevant oil ....................
.............. Change the oil
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2. Lack of oil pressure ..........................
.............. Check operation of oil pump and
reducing valve, if necessary, correct
pump fault and a pressure reducing valve.
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3. Excessive clearance between the connecting rod crankshaft journals
and inserts .............................................
.............. Dismantle the engine and check the wear of the connecting rod
journals and crankshaft bearings, if necessary, replace
Ear and neck pereshlifuyte
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4. Ovality or taper crank crankshaft journals
.............. Dismantle the engine, connecting rod pereshlifuyte cervical
and replace liners
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5. Deviation from parallelism of the axes of the upper and lower heads
rod ................................................. ..
.............. Disassemble the piston-rod group and restore
parallelism
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