Daewoo Nexia

since 1994 of release

Repair and car operation



Deu Neksiya
+ Maintenance instruction
+ Maintenance
- Engine
   2.1. Technical characteristics
   2.2. Greasing system
   2.3. Maintenance and engine repair
   2.4. Compression check
   2.5. Dismantle and engine installation assembled
   2.6. Engine support
   2.7. Inlet collector and laying
   2.8. Final collector and laying
   2.9. Cover of the case of a cam-shaft
   2.10. Pulley of a cranked shaft
   2.11. Forward cover of a gear belt
   2.12. Camshaft cogwheel
   2.13. Cogwheel of a cranked shaft
   2.14. Back cover of a gear belt
   2.15. Adjustment of a tension of a gear belt
   2.16. Verification of the angular provision of a camshaft
   2.17. Forward consolidation of a cranked shaft
   2.18. Camshaft. Levers. Hydrojacks of gaps
   2.19. Klapannye of a spring. Consolidations of cores of valves
   2.20. Head of cylinders. 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 openings of plugs
   2.25. Valves
   2.26. Klapannye of a spring
   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 gaps
   2.31. Oil pallet
   2.32. A reception branch pipe with the oil filter
   2.33. Oil pump
   2.34. Repair of the oil pump
   2.35. Pistons and rods
   2.36. Flywheel. Back consolidation of a cranked shaft
   2.37. 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. Block of cylinders
   2.43. Installation of pistons
   2.44. Disk balancing with a gear wreath
   2.45. Repair of carving openings
   - 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. Engine (two top camshafts)
+ cooling System
+ Toplevnaya and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. Electronic control unit and sensors
+ Transmission
+ 10. Five-speed transmission and main RPO MM5 broadcast
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. Forward suspension bracket
+ 15. Drive of forward wheels
+ 16. Back suspension bracket
+ Brake system
+ Body
+ Heating, ventilation
+ Electric equipment


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2.46.2. Diagnostics of malfunctions on noise and knocks

GENERAL INFORMATION

The increased noise of the mechanism of a gazoraspredeleniye

– Low pressure of oil. To make necessary repair.
– Weakening of fastening of the details actuated by a camshaft. To check and eliminate malfunction.
– Wear of the details actuated by a camshaft.
– Breakage of a klapanny spring.
– Jamming of cores of valves.
– Wear, pollution or malfunction of a drive of valves. To check, clear, if necessary to replace details.
– Wear or bad processing of a camshaft. To replace a shaft.
– Wear of directing plugs of valves.

Knocks on the cold engine are audible within 2-3 minutes after start, knocks increase at increase in a torque

– EFE valve knock with a vacuum drive. To replace the EFE valve.
– The flywheel touches a casing. To rectify casing situation.
– Weakening of fastening of a damper of fluctuations or pulleys. To tighten fastening or to replace if necessary.
– The increased gaps between pistons and cylinders. To replace pistons. Knocks of pistons on the cold engine usually disappear after short circuit on mass of a candle of the corresponding cylinder. Knock of pistons on the cold engine, I vanish shchiya in one and a half minutes after start, it is considered the normal phenomenon.
– Rod bend.

Strong knocks on the heated-up engine at increase in a torque

– Breakage of a damper of fluctuations or pulley nave. To replace faulty details.
– Weakening 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.
– Zadevaniye of elements of final system for the bottom. If necessary to restore the correct arrangement of knots of final system.
– A crack in a flywheel.
– The increased gaps in radical bearings. To replace loose leaves if necessary.
– The increased gaps in shatunny bearings. To replace loose leaves if necessary.

Weak knocks on the heated-up engine

– Detonation. To check an electronic regulator of an advancing of ignition. To check a corner of an advancing of ignition and quality of fuel.
– Weakening of fixing bolts of the hydrotransformer.
– Thinnesses in interfaces of system of production of the fulfilled gases. To tighten bolts and/or to replace laying.
– The increased gaps in shatunny 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 and replace if necessary. At останов ке the engine some valves remain open and under the influence of a klapanny spring oil is squeezed out from pushers. To replace pushers follows only at обнаруже to scientific research institute of their malfunction.
– The increased axial gap of a cranked shaft. To replace the persistent bearing of a shaft.
– The increased gap in the forward radical bearing. To replace worn-out details.

Knocks on the heated-up engine idling

– Weakening of a tension or wear of driving belts. To adjust a tension or to replace if necessary.
– Wear of bearings of the compressor of the conditioner or generator. To replace faulty bearings.
– Mechanical noise of the fuel pump. To replace the pump.
– Noise of details of the mechanism of a gazoraspredeleniye. 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 gaps between fingers and pistons. To replace pistons and fingers.
– A deviation from coaxiality of openings in rod heads. To check rods and to replace faulty details.
– Insufficient gaps between pistons and cylinders. Хонинговать cylinders and to establish a set of new pistons.
– Weakening of fastening of a damper of fluctuations. To tighten fastening or to replace worn-out details.
– Wrong shift of a piston finger. To rearrange the piston.