Tayota Kamri's repair since 2001
1. Operation manual and to maintenance of the car
2. Engine
2.1. Petrol engines models 1AZ-FE and 2AZ-FE
2.2. Mechanical part of engines of models 1AZ-FE and 2AZ-FE
2.2.1. General information and safety measures on removal of the power unit
2.2.2. Removal of sealant
2.2.3. The specification of types of the applied nuts and bolts
2.2.4. Service of a mechanical part of the engine
2.2.5. General repair operations
2.2.6. Dismantling, check and assembly of a head of the block of cylinders
2.2.7. Dismantling, check and assembly of the block of cylinders
2.2.7.1. Dismantling of the block of cylinders
2.2.7.2. Check of a radial side play of the conrod bearing
2.2.7.3. Replacement of inserts of radical bearings
2.2.7.4. Removal of the piston and rod assembled
2.2.7.5. Measurement of axial and radial side plays of a bent shaft and in radical bearings
2.2.7.6. Check of a gap between the piston and the cylinder
2.2.7.7. Check of a gap between a compression ring and a flute
2.2.7.8. Check of a gap in the lock of a piston finger
2.2.7.9. Check of internal diameter of an opening under a finger in the piston
2.2.7.10. Check of diameter of a piston finger
2.2.7.11. Check of landing of a piston finger
2.2.7.12. Check of a rod
2.2.7.13. Check of a kolnchaty shaft
2.2.7.14. Check of conrod and radical necks
2.2.7.15. Check of conrod bolts
2.2.7.16. Check and replacement of inserts of radical bearings
2.2.7.17. Assembly of conrod and piston group
2.2.7.18. Installation of piston rings
2.2.7.19. Installation of inserts of conrod bearings
2.2.7.20. Assembly of the block of cylinders
2.2.8. General assembly
2.3. Petrol engine of model 1MZ-FE
2.4. Mechanical part of the engine of model 1MZ-FE
2.5. Appendix
2.6. Tables
3. Transmission
4. Running gear
5. Steering
6. Brake system
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment




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2-2-7-8-proverka-zazora-v-zamke-porshnevogo-palca.html

2.2.7.8. Check of a gap in the lock of a piston finger

Fig. 2.111. Pushing through of a ring of the piston: 1 – piston ring


To check a gap in the lock of a piston ring, install a ring in the block cylinder. The piston push a ring from the surface of the block of cylinders, as shown in the figure 2.111.

Fig. 2.112. Measurement of a gap in the lock


Measure by the flat probe a gap in the lock (fig. 2.112).
If the gap in the lock is more than maximum, replace a piston ring. If the gap in the lock is more maximum even with a new piston ring, replace the block of cylinders.
Nominal gap:
compression ring No. 1 –
1AZ-FE – 0,30–0,40 mm;
2AZ-FE – 0,22–0,32 mm;
compression ring No. 2 –
1AZ-FE – 0,47–0,62 mm;
2AZ-FE – 0,50–0,60 mm;
oil scraper ring –
1AZ-FE – 0,10–0,35 mm;
2AZ-FE – 0,10–0,35 mm.
Limit gap:
compression ring No. 1 –
1AZ-FE – 0,89 mm;
2AZ-FE – 0,89 mm;
compression ring No. 2 –
1AZ-FE – 1,37 mm;
2AZ-FE – 1,37 mm;
oil scraper ring –
1AZ-FE – 0,73 mm;
2AZ-FE – 0,73 mm.

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2.2.7.7. Check of a gap between a compression ring and a flute
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2.2.7.9. Check of internal diameter of an opening under a finger in the piston