Daewoo Nexia

Since 1994 of release

Repair and car operation



Daewoo Nexia
+ The maintenance instruction
+ Maintenance service
- The engine
   2.1. Technical characteristics
   2.2. Greasing system
   2.3. Maintenance service and engine repair
   2.4. Compression check
   2.5. Dismantle and engine installation in gathering
   2.6. Engine support
   2.7. An inlet collector and a lining
   2.8. A final collector and a lining
   2.9. A cover of the case of a cam-shaft
   2.10. A pulley of a cranked shaft
   2.11. A forward cover of a gear belt
   2.12. A camshaft cogwheel
   2.13. A cogwheel of a cranked shaft
   2.14. A back cover of a gear belt
   2.15. Adjustment of a tension of a gear belt
   2.16. Check of angular position of a camshaft
   2.17. Forward consolidation of a cranked shaft
   2.18. A camshaft. Levers. Hydrojacks of backlashes
   2.19. Klapannye springs. Consolidations of cores of valves
   2.20. A head of cylinders. The camshaft case
   2.21. Repair of a head of the block of cylinders
   2.22. Dismantle of valves
   2.23. Directing plugs of valves
   2.24. Expansion of apertures of plugs
   2.25. Valves
   2.26. Klapannye springs
   2.27. Saddles of valves
   2.28. Consolidations of valves
   2.29. Height of a core of the valve concerning a head of the block of cylinders
   + 2.30. Pushers of valves with hydrojacks of backlashes
   2.31. The oil pallet
   2.32. A reception branch pipe with the oil filter
   2.33. The oil pump
   2.34. Repair of the oil pump
   2.35. Pistons and rods
   2.36. A flywheel. Back consolidation of a cranked shaft
   2.37. A cranked shaft
   2.38. Rods and radical bearings
   2.39. Replacement of loose leaves
   2.40. Piston group and rods
   2.41. Piston fingers and rings
   2.42. The block of cylinders
   2.43. Installation of pistons
   2.44. Balancing of a disk with a gear wreath
   2.45. Repair of carving apertures
   - 2.46. Diagnostics of malfunctions of the engine
      2.46.1. Diagnostics of malfunctions of mechanisms of the engine
      2.46.2. Diagnostics of malfunctions on noise and knocks
+ 3. The engine (two top camshafts)
+ Cooling system
+ Топлевная and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. The electronic block of management and gauges
+ Transmission
+ 10. A five-speed transmission and the main transfer RPO MM5
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. A forward suspension bracket
+ 15. A drive of forward wheels
+ 16. A back suspension bracket
+ Brake system
+ Body
+ Heating, ventilation
+ Electric equipment



2.46.2. Diagnostics of malfunctions on noise and knocks
THE GENERAL DATA

The raised noise of the mechanism timing

– Low pressure of oil. To make necessary repair.
– Easing of fastening of the details set in motion by a camshaft. To check up and eliminate malfunction.
– Deterioration of the details set in motion by a camshaft.
– Breakage клапанной springs.
– Jamming of cores of valves.
– Deterioration, pollution or malfunction of a drive of valves. To check up, clear, if necessary to replace details.
– Deterioration or bad processing of a camshaft. To replace a shaft.
– Deterioration of directing plugs of valves.

Knocks on the cold engine are audible within 2-3 minutes after start, knocks increase at twisting moment increase

– Knock of valve EFE with a vacuum drive. To replace valve EFE.
– The flywheel touches a casing. To rectify casing situation.
– Fastening easing демпфера fluctuations or pulleys. To tighten fastening or to replace if necessary.
– The increased backlashes between pistons and cylinders. To replace pistons. Knocks of pistons on the cold engine usually disappear after short circuit on weight of a candle of the corresponding cylinder. Knock of pistons on the cold engine, I vanish щий in one and a half minute after start, it is considered the normal phenomenon.
– A rod bend.

Strong knocks on the heated-up engine at twisting moment increase

– Breakage демпфера fluctuations or a pulley nave. To replace faulty details.
– Easing of fixing bolts of the hydrotransformer.
– Belts of a drive of auxiliary units or a crack on belts are drawn. To adjust a tension of belts or to replace faulty belts.
Zadevanie of elements of final system for the bottom. If necessary to restore a correct arrangement of knots of final system.
– A crack in a flywheel.
– The increased backlashes in radical bearings. To replace loose leaves if necessary.
– The increased backlashes in шатунных bearings. To replace loose leaves if necessary.

Weak knocks on the heated-up engine

– A detonation. To check up an electronic regulator of an advancing of ignition. To check up a corner of an advancing of ignition and quality of fuel.
– Easing of fixing bolts of the hydrotransformer.
– Thinnesses in interfaces of system of release of the fulfilled gases. To tighten bolts and-or to replace a lining.
– The increased backlashes in шатунных bearings. To replace loose leaves if necessary.

Short-term knocks right after engine start

– Mechanical noise of the fuel pump. To replace the pump.
– Application of unrecommended engine oil. To replace oil. It is necessary to use the engine oil which viscosity corresponds to prevailing service conditions of the car (a range of temperatures of air).
– Malfunction of hydraulic pushers of valves. To clear, check up and replace if necessary. At останов ке the engine some valves remain opened and under action клапанной springs oil is squeezed out from pushers. To replace pushers follows only at обнаруже нии to their malfunction.
– The increased axial backlash of a cranked shaft. To replace the persistent bearing of a shaft.
– The increased backlash in the forward radical bearing. To replace the worn out details.

Knocks on the heated-up engine idling

– Easing of a tension or deterioration drivers belts. To adjust a tension or to replace if necessary.
– Deterioration of bearings of the compressor of the conditioner or the generator. To replace faulty bearings.
– Mechanical noise of the fuel pump. To replace the pump.
– Noise of details of the mechanism timing. To replace faulty details.
– Application of unrecommended engine oil. To replace oil. It is necessary to use the engine oil which viscosity corresponds to prevailing service conditions of the car.
– The increased backlashes between fingers and pistons. To replace pistons and fingers.
– A deviation from соосности apertures in rod heads. To check up rods and to replace faulty details.
– Insufficient backlashes between pistons and cylinders. Хонинговать cylinders and to establish the complete set of new pistons.
– Fastening easing демпфера fluctuations. To tighten fastening or to replace the worn out details.
– Wrong displacement of a piston finger. To rearrange the piston.