Mazda 3 since 2003
1. Operation and maintenance of the car
2. Engine
2.1. General description of new engines of the L8, LF and L3 models
2.2. Mechanical part of engines
2.2.1. Engines of the L8 and LF models
2.2.2. Verification of the contents of CO/CH in the fulfilled gases
2.2.3. Measurement of a compression in engine cylinders
2.2.4. Check of a belt of the drive of auxiliary units
2.2.4.1. Procedure of check
2.2.4.2. Replacement of a driving belt
2.2.4.3. Check of an automatic natyazhitel of a driving belt
2.2.4.4. Check of thermal gaps in the mechanism of the drive of valves
2.2.4.5. Adjustment of thermal gaps in the mechanism of the drive of valves
2.2.5. General information and safety measures at removal of the power unit
2.2.6. Removal of sealant
2.2.7. Removal and installation of the power unit
2.2.8. Check of the executive mechanism of change of phases of gas distribution (L3)
2.2.9. Removal and installation of the executive mechanism of change of phases of gas distribution (L3)
2.2.10. Gas distribution mechanism drive chain
2.2.11. Removal and installation of the operating oil valve (OCV) (L3)
2.2.12. Check of the operating oil valve (OCV) (L3)
2.2.13. Check of operation of the spool-type valve (OCV) (L3)
2.2.14. The general repair operations on the power unit
2.2.15. Check of a head of the block of cylinders
2.2.16. Assembly of the block of cylinders (beginning)
2.2.17. Assembly of the block of cylinders (termination)
2.2.18. Assembly of a head of the block of cylinders
2.2.19. Assembly of the drive of the mechanism of gas distribution
2.3. Appendix 1
2.4. Appendix 2
2.5. Appendix 3
2.6. The Z6 engine – a mechanical part
2.7. Lubrication system
2.8. Cooling system
2.9. System of an admission
2.10. Fuel system
2.11. System of production of the fulfilled gases and system of decrease in toxicity
2.12. System of ignition
2.13. Control system
2.14. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
 








2-2-4-5-regulirovka-teplovykh-zazorov-v-mekhanizme-privoda-klapanov.html

2.2.4.5. Adjustment of thermal gaps in the mechanism of the drive of valves

Disconnect a negative wire of the rechargeable battery.
Remove the right wheel.
Remove the right mudguard.
Turn out spark plugs.
Disconnect a high-voltage wire.
Disconnect the socket of the operating oil valve (OCV).
Remove a ventilation hose.
Uncover a head of the block of cylinders. Make sure that the engine cold.
Take off a driving belt.
Remove the right integrated shaft from the intermediate driveshaft.

Fig. 2.78. Lower cap of a forward cover of the engine: 1 – cap


Remove the lower cap of a forward cover of the engine (fig. 2.78).
Remove the top cap of a forward cover of the engine.

Fig. 2.79. Lower cap of the block of cylinders: 1 – cap


Remove the lower cap of the block of cylinders (fig. 2.79).

Fig. 2.80. Installation of the special device


Install special adaptation (fig. 2.80).
Turn a bent shaft clockwise to cylinder No. 1 piston VMT.
Weaken a gas distribution mechanism drive chain.
a) Using the suitable screw-driver or the similar tool, unblock a ratchet of a natyazhitel of a chain.
b) Turn a cam-shaft of the drive of final valves clockwise, using the corresponding wrench (hexagon) and weaken a gas distribution mechanism drive chain.

Fig. 2.81. Fixing of the directing chain in the provision of easing


c) Having placed the corresponding bolt (M6 1,0 length of 25-35 mm) in an opening of the top cap of a forward cover of the engine, record a chain guide in the provision of easing (fig. 2.81).

Fig. 2.82. Fixing of cam-shafts of the drive of final valves


Record a cam-shaft of the drive of final valves, using the corresponding key (hexagon) (fig. 2.82).

Fig. 2.83. Lower cap of the block of cylinders: 1 – asterisk of a cam-shaft of inlet valves


Remove an asterisk of a cam-shaft of the drive of final valves (fig. 2.83).

Fig. 2.84. Order of weakening of bolts of a cam-shaft


Weaken cam-shaft bolts in stages in that order (fig. 2.84).

NOTE
The head of the block of cylinders and cover of bearings of a cam-shaft are numbered for simplification of their repeated installation in initial situation at assembly. After removal you hold covers together with a head of the block of cylinders from which they were removed. Do not mix a cover.

Remove a cam-shaft.
Remove a valve pusher.
Vybrerite the corresponding adjusting laying, being guided by the following scheme and records made during initial check:
new adjusting laying = the removed laying + the measured valvate gap – a standard valvate gap.
admission – 0,25 mm;
release – 0,30 mm.
The standard (on the cold engine):
admission – 0,22–0,28 mm (0.25±0.03 mm);
release – 0,27–0,33 mm (0.30±0.03 mm).
Establish a cam-shaft, the piston of the cylinder No. 1 has to be in the provision of VMT.

Fig. 2.85. Order of tightening of bolts of a cam-shaft


Tighten a cam-shaft bolt in two steps (fig. 2.85):
moment of 5,0-9,0 N · m;
moment of 14,0-17,0 N · m.
Establish an asterisk of a cam-shaft of the drive of final valves (see fig. 2.83).

NOTE
Do not tighten a bolt of an asterisk of the camshaft. At first check the moment of opening or closing of the valve, then tighten a bolt.


Fig. 2.86. Installation of special adaptation on a cam-shaft


Install special adaptation (fig. 2.86) on a cam-shaft.
Remove a bolt (M6x1,0, length of 25-35 mm) from a forward cover of the engine to pull a gas distribution mechanism drive chain.
Turn a bent shaft clockwise to cylinder No. 1 piston VMT.
Hold a cam-shaft of the drive of final valves, using a suitable wrench (hexagon) (see fig. 2.82).
Tighten a bolt of an asterisk of a cam-shaft of the drive of final valves the moment of an inhaling of 69-75 N · m.
Remove special adaptation from a cam-shaft.
Remove special adaptation from an opening of the lower cap of the block.
Turn a bent shaft clockwise on two turns to the provision of VMT. If the provision of VMT is not reached, weaken a bolt of a pulley of a bent shaft and perform all operations, since installation of special adaptation (see fig. 2.80).
Apply silicon and organic sealant on the top cap of a forward cover of the engine.
Establish the top cap of a forward cover of the engine, having tightened its moment inhalings of 10 N · m.
Establish the lower cap of the block of cylinders, having tightened its moment inhalings of 18-22 N · m.
Establish a new lower cap of a forward cover of the engine, having tightened its moment inhalings of 12 N · m.
Establish the right intermediate shaft of the drive and the integrated shaft.
Establish a driving belt.
Establish a cover of a head of the block of cylinders.
Attach a ventilation hose.
Connect the socket of the operating oil valve (OCV).
Connect a high-voltage wire.
Screw spark plugs.
Establish the right mudguard.
Establish the right wheel.

"previous page
2.2.4.4. Check of thermal gaps in the mechanism of the drive of valves
following page"
2.2.5. General information and safety measures at removal of the power unit