Toyota Camry

1992-1997 of release

Repair and car operation

Kamri's Toyota
+ General data
+ 1. Maintenance
+ 2. Engine
+ 3. Six-cylinder V6 engines
- 4. Major maintenance of engines
   4.2. General information
   4.3. Compression check
   4.4. Recommendations about engine removal
   + 4.5. Removal and engine installation
   4.6. Sequence of dismantling of the engine
   4.7. Dismantling of a head of the block of cylinders
   + 4.8. Cleaning and survey of a head of the block of cylinders
   4.9. Assembly of a head of the block of cylinders
   4.10. Removal of pistons with rods
   4.11. Removal of a cranked shaft
   + 4.12. Block of cylinders of the engine
   4.13. Pistons and rods
   4.14. Cranked shaft
   + 4.15. Survey and choice of radical and shatunny bearings
   4.16. Control люфта balance weight assemblies (engine 5S-FE)
   4.17. Engine balance of assembly at major maintenance
   4.18. Installation of piston rings
   + 4.19. Installation of a cranked shaft and check of working gaps of bearings
   4.20. Installation of a back sealing ring of a cranked shaft
   4.21. Installation of pistons and rods, check of working gaps of bearings
   4.22. Installation of assembly of the balance weight (engine 5S-FE)
   4.23. Engine start after major maintenance
+ 5. Cooling and heating
+ 6. Fuel system
+ 7. Ignition system
+ 8. Toxicity fall
+ 9. Transmission
+ 10. Automatic transmission
+ 11. Coupling and power shafts
+ 12. Brake system
+ 13. Suspension bracket
+ 14. Body
+ 15. Electric equipment

4.3. Compression check



On the V6 engine 1MZ-FE disconnect electric sockets from ignition coils.

Measurement of pressure of oil on the engine 5S-FE

Measurement of pressure of oil on the engine 3VZ-FE

Arrangement of the sensor of pressure of oil on the forward party of the engine 1MZ-FE

Installation компрессометра in an opening for a spark plug for compression measurement in cylinders

In case of reduction of engine capacity which is not defect of ignition or fuel system, check of a compression can define an engine condition. If check is carried out regularly, it is possible to define defect which will be shown soon.

The engine should be heated-up to working temperature. Level of oil should correspond to norm, and the accumulator is completely charged. Also the help of the assistant is required.
1. Unscrew from the engine all spark plugs.
2. Remove the central high-voltage wire from a cover of the distributor and connect it to weight. Open a power-supply circuit of the fuel pump.
3. Screw in a tip компрессометра in an opening of a spark plug of the cylinder No. 1.
4. The assistant should press against the stop a pedal of an accelerator and turn the engine a starter within several seconds. Thus it is necessary to watch indications компрессометра. Pressure will grow quickly enough in the serviceable engine. Low pressure on the first piston stroke, accompanied by gradual increasing pressure on the subsequent courses, indicates worn-out piston rings. Low pressure on the first course which does not raise further indicates leaky valves or the punched laying of a head of the block of cylinders. Deposits on a reverse side of plates of valves can promote low pressure also. Make record of the most high pressure, then repeat procedure for the remained cylinders.
5. Because of a variety компрессометров and speeds of rotation of a cranked shaft of the engine a starter data often differ at compression check. For this reason the actual pressure of compression is not specified, however the most important factor is that pressure should be identical in all cylinders.
7. Add in cylinders insignificant amount of engine oil (about 20 cm3) through an opening for spark plugs and then repeat tests.
8. If there is an increase in pressure after oil is added, indicative that piston rings are worn-out. If pressure does not increase, available leak in valves or laying to a head of the block of cylinders. Leakage of valves can be caused by the burned saddles or plates of valves or pognuty valves.
9. If two adjacent cylinders have equally low pressure, it is the most probable that laying of a head of the block of cylinders burned through between them. Emergence of cooling liquid in chambers of combustion or on щупе for measurement of level of engine oil confirms this defect.
10. If pressure in one cylinder approximately for 20 % is lower, than in other, and the engine has slightly rough mode of idling, the worn-out cam on distributive to a shaft can be the reason of it.
11. After check establish spark plugs and repeatedly connect high-voltage wires and the ignition coil. Restore a power-supply circuit of the fuel pump.