Mazda 3 since 2003
1. Operation and car maintenance
2. Engine
2.1. General description of new engines of the L8, LF and L3 models
2.2. Mechanical part of engines
2.3. Appendix 1
2.4. Appendix 2
2.5. Appendix 3
2.6. The Z6 engine – a mechanical part
2.6.1. Check of a belt of a drive of auxiliary units
2.6.2. Check of thermal gaps in the mechanism of a drive of valves
2.6.3. Compression check
2.6.4. Removal and installation of a chain of a drive of the mechanism of a gazoraspredeleniye
2.6.5. Replacement of laying of the block of cylinders
2.6.6. Replacement of a forward epiploon of a cranked shaft
2.6.7. Replacement of a back epiploon of a cranked shaft
2.6.8. Removal and engine installation
2.7. Greasing system
2.8. Cooling system
2.9. Admission system
2.10. Fuel system
2.11. System of production of the fulfilled gases and system of decrease in toxicity
2.12. Ignition system
2.13. Control system
2.14. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
 








2-6-3-proverka-kompressii.html

2.6.3. Compression check

ATTENTION
The hot engine can become the reason of serious burns.
Watch to burning at removal and installation of elements of the engine.

Be convinced of that the storage battery is completely charged.
Warm up the engine to normal working temperature.
Stop the engine and let's to it cool down during about 10 mines to cool release system.
Remove the relay of the fuel pump.
Remove the air filter assembled.
Remove ignition coils.
Remove all spark plugs.
Measure a compression as follows.

Installation компрессометра in a spark plug opening
Fig. 2.251. Installation компрессометра in a spark plug opening


Establish компрессометр in a spark plug opening (fig. 2.251).
Completely open a butterfly valve.
Turning the engine a starter measure a compression.
Compression:
Standard – 1470 kPas (250 mines-1);
At least – 1029 kPas (250 mines-1);
The maximum difference between cylinders – 196.1 kPas.
Execute the first three operations for all cylinders.
If the compression size less minimum value or a compression in one of cylinders differs from a compression in other cylinders on 196,1 kPas or more, execute the first three having filled in a small amount of engine oil in openings of spark plugs.
If the compression rose after filling of engine oil, wear or damage of a piston ring or a cylinder surface is possible.
If the compression did not rise, jamming of valves, a leaky prileganiye of valves or leak through laying of a head of the block of cylinders is possible.
In both cases nebkhody engine repair.
Establish spark plugs.
Establish the ignition coil.
Establish the air filter assembled.
Establish the relay of the fuel pump.

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2.6.2.1. Adjustment of thermal gaps in the mechanism of a drive of valves
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2.6.4. Removal and installation of a chain of a drive of the mechanism of a gazoraspredeleniye