Mazda 626

1991-1998 of release

Repair and operation of the car

Mazda 626

+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   + 3.1. Petrol engines (1,6 and 1,8 liters)
   + 3.2. Petrol 4-cylinder engine (2 liters)
   + 3.3. Petrol V6 engine (2,5 liters)
   - 3.4. Partition of engines (1,6 and 1,8 liters)
      3.4.1. Introduction
      3.4.2. Technical characteristics
      3.4.3. Repair work without dismantle of the engine from the car
      + 3.4.4. Capital repairs of the engine
      3.4.5. Checks of the engine
      3.4.6. Removal and installation of the engine
      3.4.7. Preparation for a partition
      3.4.8. Engine partition
      3.4.9. Partition and check of a head of cylinders
      3.4.10. Repair of valves
      3.4.11. Assembly of a head of cylinders
      3.4.12. Removal of pistons and rods
      3.4.13. Removal of a bent shaft
      3.4.14. Check and cleaning of the block of cylinders
      3.4.15. Honingovaniye of cylinders
      3.4.16. Check of pistons and rods
      3.4.17. Check of a bent shaft
      3.4.18. Check of radical bearings and bearings of rods
      3.4.19. Engine assembly order
      3.4.20. Installation of piston rings
      3.4.21. Installation of a bent shaft
      3.4.22. Installation of a back epiploon of a bent shaft
      3.4.23. Installation of pistons and rods
      3.4.24. Launch of the engine after repair and a running in
   + 3.5. Partition of engines (2,0 and 2,5 liters of V6)
   + 3.6. Diesel engine 2,0 liters
   + 3.7. Systems of electric equipment of the engine
+ 4. Heating and ventilation
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electrical circuitries
+ 14. Useful tips


3.4.9. Partition and check of a head of cylinders

1. Remove camshafts and regulators of valves.
2. By means of the special tool squeeze a valve spring.
3. Remove conical plugs of the valve.
4. Remove a plate, a spring and a saddle of a spring.
5. Get the valve via the combustion chamber.
6. After removal, put each valve and its elements in the separate marked bag.

1. Carefully clean off traces of old laying of a head by means of a scraper or special solvent.
2. Remove deposits from head openings.
3. Clean dirt and the remains of sealant from openings with a carving.
4. Clean a head solvent and dry up it.
5. Clean solvent and dry up regulators of valves, springs of valves, conical plugs, plates and saddles of springs.
6. Clean valves.

1. Check a head of cylinders for existence of cracks and damages, if necessary the head needs to be processed on the special machine or to replace.
2. By means of a ruler and the probe, check whether the surface on which laying of a head is established is deformed (the typical head of the cylinder is shown).
3. Check saddles of valves if on them there are any damages address experts.
4. Measure gaps between the directing plugs and rods of valves. The gap has to be about 1,6 mm. In need of the plug it is necessary to replace.

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