Mazda 626

1991-1998 of release

Repair and car operation

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)
      3.3.1. Introduction
      3.3.2. Technical characteristics
      3.3.3. Recommendations about repair
      3.3.4. Top dead point of the first piston
      3.3.5. Covers of heads of cylinders
      3.3.6. Springs, clamps and epiploons of valves
      3.3.7. Gas-distributing belt and asterisks
      3.3.8. Camshafts and pushers
      3.3.9. Inlet collector
      3.3.10. Final collectors
      3.3.11. Heads of cylinders
      3.3.12. Forward epiploon of a cranked shaft
      3.3.13. Oil pallet
      3.3.14. Oil pump
      3.3.15. Flywheel or leading disk
      3.3.16. Back epiploon of a cranked shaft
      3.3.17. Engine fastenings
   + 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 of 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 semi-axes
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electroschemes
+ 14. Good advice

3.3.4. Top dead point of the first piston


The top dead point is a highest point of which reaches each of pistons in engine operating time. Usually the highest point of which reaches the N1 piston at the moment of a compression step is accepted to VMT.

To establish the piston in VMT, establish the gear shifting lever in neutral situation, put the car on the hand brake and block back wheels. To disconnect ignition system, disconnect wires from the ignition coil (see subsection Unscrew spark plugs (see subsection 2.19).

Models of 1997 and earlier release

1. Remember an arrangement of contact of a wire of the first spark plug on a cover of the distributor of ignition.
2. Uncover the distributor.
3. Make a mark in the distributor where contact of the first cylinder is located.
4. Turn a cranked shaft clockwise to combine a cut on a pulley of a cranked shaft with a sinkhronizatsionny label (it is specified by shooters).
5. The rotor of the distributor should indicate towards the label made by you. If the rotor indicates a label, means, the N1 piston is in VMT at the moment of a compression step.


If a rotor will turn on 180 ° in relation to a label, means, the piston is in VMT of a step of release.

6. To move the piston to VMT of a step of compression, turn a cranked shaft clockwise on one complete revolution (360 °).

Models of 1998

Models of 1998 are equipped with the systems of ignition which are not including the distributor.

1. To establish the piston in VMT, unscrew a candle of the first cylinder and twist in its opening a pressure measuring instrument.
2. Turn a cranked shaft. When the N1 piston will come nearer to VMT of a step of compression, the measuring instrument will show pressure of a compression. Continue to turn a cranked shaft while the cut in an asterisk of a cranked shaft will not be combined with a sinkhronizatsionny label.

All models

After you established the N1 piston in VMT, you can establish in VMT (according to sequence of operation of cylinders) each of the remained pistons, having turned a cranked shaft on 120 °.