Mazda 6 since 2002
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
2.2.1. Engines of the L8 and LF models
2.2.2. Verification of the contents WITH / SN in the fulfilled gases
2.2.3. Compression measurement in engine cylinders
2.2.4. Check of a belt of a drive of auxiliary units
2.2.5. General information and safety measures at removal of the power unit
2.2.6. Hermetic removal
2.2.7. Removal and installation of the power unit
2.2.8. Check of the executive mechanism of change of phases of a gazoraspredeleniye (L3)
2.2.9. Removal and installation of the executive mechanism of change of phases of a gazoraspredeleniye (L3)
2.2.10. Chain of a drive of the mechanism of a gazoraspredeleniye
2.2.11. Removal and installation of the operating oil valve (OCV) (L3)
2.2.12. Check of the operating oil valve (OCV) (L3)
2.2.13. Check of operation of the zolotnikovy valve (OCV) (L3)
2.2.14. The general repair operations on the power unit
2.2.15. Check of a head of the block of cylinders
2.2.16. Assembly of the block of cylinders (beginning)
2.2.17. Assembly of the block of cylinders (termination)
2.2.18. Assembly of a head of the block of cylinders
2.2.19. Assembly of a drive of the mechanism of a gazoraspredeleniye
2.3. Appendix 1
2.4. Appendix 2
2.5. Appendix 3
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
 






2-2-3-izmerenie-kompressii-v-cilindrakh-dvigatelya.html

2.2.3. Compression measurement in engine cylinders

NOTE
Compression measurement in cylinders of the engine is recommended to be made in the following cases: decrease in the engine capacity, the raised consumption of the engine oil, the increased fuel consumption.

Warm up the engine to normal working temperature, stop it and wait for 10 minutes.
Remove coils of spark plugs
Turn out all spark plugs from heads of the block of cylinders.

Installation компрессометрах
Fig. 2.73. Installation компрессометрах


Insert a tip компрессометра into a candle opening of a head of the block of cylinders and measure a compression in engine cylinders (fig. 2.73).
Completely open a butterfly valve.
Consider indications компрессометра at a prokruchivaniye of a cranked shaft of the engine as a starter.

NOTE
At compression measurement the storage battery should be completely charged, as for correct measurement it is necessary, that frequency of rotation of a cranked shaft of the engine made not less than 300 mines-1.

Repeat measurement operation for each cylinder.

NOTE
Duration of measurement of a compression in each cylinder should be as little as possible.

Compression size for L8 model engines:
the standard – 1750 kPas (17,855 kg/cm2);
the minimum admissible – 1225 kPas (12,492 kg/cm2).
The difference of the measured values of a compression on engine cylinders (for the serviceable engine) should make no more than 196,1 kPas (1,99 kg/cm2).
Compression size for LF model engines:
the standard – 1720 kPas (17,539 kg/cm2);
the minimum admissible – 1204 kPas (12,277¬ú/cm2).
The difference of the measured values of a compression on engine cylinders (for the serviceable engine) should make no more than 196,1 kPas (1,99 kg/cm2).
Compression size for L3 model engines:
the standard – 1430 kPas (14,581 kg/cm2);
the minimum admissible – 1000 kPas (10,197¬ú/cm2).
The difference of the measured values of a compression on engine cylinders (for the serviceable engine) should make no more than 196,1 kPas (1,99 kg/cm2).
If in one or several cylinders the size of a compression is lower minimum admissible, fill in in the cylinder through a candle opening a small amount of engine oil and repeatedly measure a compression in these the cylinder.
If after in the cylinder oil was filled in, the size of a compression increased, wear or damage of piston rings or cylinder walls, most likely, takes place.
If after in the cylinder oil was filled in, the size of a compression did not change, lag of the valve or its leaky landing in a saddle, or leak through laying of a head of the block of cylinders, most likely, takes place.
Establish to the place of a spark plug.
Establish to the place of the coil of spark plugs.

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2.2.4. Check of a belt of a drive of auxiliary units