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)
      3.1.1. Introduction
      3.1.2. Technical characteristics
      3.1.3. Recommendations about repair
      3.1.4. Top dead point
      3.1.5. Cover of valves
      3.1.6. Inlet collector
      3.1.7. Final collector
      3.1.8. Gas-distributing belt and asterisks
      3.1.9. Camshaft epiploons
      3.1.10. Yokes and distributive shaft
      3.1.11. Springs of valves, fastenings and laying
      3.1.12. Head of cylinders
      3.1.13. Oil pallet
      3.1.14. Forward cover
      3.1.15. Oil pump
      3.1.16. Forward epiploon of a bent shaft
      3.1.17. Flywheel
      3.1.18. Back epiploon of a bent shaft
      3.1.19. Fastenings of the engine
   + 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)
   + 3.5. 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


3.1.12. Head of cylinders


Sequence of tightening of bolts of a head of cylinders


1. Disconnect a wire of the minus plug of the accumulator.
2. Unscrew spark plugs.
3. Merge cooling liquid.
4. Remove an airintaking branch pipe.
5. Remove the resonator.
6. Remove ropes of a throttle and an accelerator.
7. Remove a vacuum hose of the brake system, a fuel hose, radiator hoses, a vacuum hose of system a cruise control and hoses of a heater.
8. Disconnect all wires from a head.
9. Unscrew bolts and nuts of a water tube.
10. Remove a pulley of the water pump and a driving belt.
11. Remove an air inlet and the fuel highway.
12. Remove an inlet collector.
13. Disconnect an exhaust pipe from a final collector.
14. Uncover valves.

15. Uncover a gas-distributing belt and a gas-distributing belt.

16. Take off driving belts of the pump of the power steering and generator.
17. Remove a generator arm.
18. Remove the ignition distributor.
19. Unscrew bolts of the pump of the power steering and arrange the pump aside.

20. Examine a head and disconnect the details preventing removal of a head.

21. Weaken head bolts in stages on a quarter of a turn. Weaken bolts in the sequence of the return sequence of tightening.
22. Remove bolts and remove a head.

23. Examine a head.


1. Carefully clean and examine the joined surfaces of a head and the block of cylinders on existence of scratches and damages. Small scratches can be cleaned off a small emery paper.
2. Clean carvings of bolts of a head and a carving in the block of cylinders by means of dies and taps of the suitable size.
3. Establish new laying of a head.
4. Install a head on the block of cylinders.
5. Oil carvings of bolts, insert bolts and tighten them fingers.
6. Tighten bolts in stages in the specified sequence.

7. Establish the remained details and knots, connect all hoses and wires. Fill in cooling liquid and check operation of the engine.

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