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)
   + 3.4. Partition of engines (1,6 and 1,8 liters)
   - 3.5. Partition of engines (2,0 and 2,5 liters of V6)
      3.5.1. Introduction
      + 3.5.2. Technical characteristics
      3.5.3. Repair work without engine dismantle from the car
      + 3.5.4. Major maintenance of the engine
      3.5.5. Check by means of a vacuum measuring instrument
      3.5.6. Compression check
      3.5.7. Methods of dismantle of the engine
      3.5.8. Removal and engine installation
      3.5.9. Engine partition
      3.5.10. Partition and check of a head of cylinders
      3.5.11. Valves
      3.5.12. Assembly of a head of cylinders
      3.5.13. Removal of pistons and rods
      3.5.14. Removal of a cranked shaft
      3.5.15. Check of the block of cylinders
      3.5.16. Honingovaniye of cylinders
      3.5.17. Check of pistons and rods
      3.5.18. Check of a cranked shaft
      3.5.19. Check and selection of radical bearings and bearings of rods
      3.5.20. Check of camshafts and pushers
      3.5.21. Engine assembly order
      3.5.22. Installation of piston rings
      3.5.23. Installation of a cranked shaft
      3.5.24. Installation of a back epiploon of a cranked shaft
      3.5.25. Installation of pistons and rods
   + 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



3.5.5. Check by means of a vacuum measuring instrument

GENERAL INFORMATION

Vacuum measuring instrument

Typical indications of a vacuum measuring instrument

1. Low constant pressure
2. Low changing pressure
3. Regular pressure jumps
4. Chaotic pressure jumps
5. Fast vibration of an arrow
6. Strong fluctuations of pressure
7. Continuous pressure decline

Connect a measuring instrument to an inlet collector. Warm up the engine and leave it to idle.

If the engine is serviceable, the measuring instrument should show 17–22 inches, and the arrow should twitch evenly.

If indications of a measuring instrument are lower necessary, the following reasons are probable: laying between an inlet collector and the carburetor or a throttle proceeds, the vacuum hose proceeds, the corner of an advancing of ignition or a camshaft angle of rotation is not adjusted.

If indications of a measuring instrument are lower normal on 8 inches – laying of an inlet collector proceeds or the injector is faulty.

If the arrow through equal intervals falls on 2 inches below a normal mark – valves proceed.

If the arrow strongly non-uniformly twitches down – jams the valve or spark plugs are faulty.

Arrow vibration on four inches and exhaust gases – directing plugs of valves are worn-out.

Fast vibration at increase in turns of the engine – proceeds laying of an inlet collector or a head, springs of valves are worn-out, valves are burned or candles are faulty.

Weak twitching of an arrow about a normal mark on 1 inch – problems with ignition.

Strong twitching of an arrow – laying of a head of cylinders is spoiled.

If the arrow slowly deviates on big pieces – fuel incorrectly mixes up, laying of an inlet collector or a throttle proceeds.

Increase turns to 2500 and muffle the engine, the arrow should fall almost to zero, then rise by 5 inches above a normal mark and come back to a normal mark.

If it does not occur, piston rings are worn-out.

If there is a long delay – the exhaust system is littered.