Note: If there is insufficient power, increased oil and/or fuel consumption, measure the compression end pressure.
1. Warm up the engine to normal operating temperature and stop it. (Gasoline engines)
2. (3S-GE) Disconnect the cold start injector connector.
3. Disconnect the connectors of the distributor or the complex block of the non-contact ignition system.
4. Disconnect high voltage wires from spark plugs.
Note: do not pull wires. Pulling or bending wires can cause them to break internally.
5. Remove the spark plugs using a special 16mm spark plug wrench. (Diesel engines)
6 Disconnect the fuel cut solenoid connector wire.
7. Remove the seals, remove the nuts and remove the glow plug bar.
8. Remove the glow plugs. (All engines)
9. Check the compression pressure in the cylinder.
- A) (Except 2C, 2C-T) Insert the compression gauge into the spark plug hole. (2S, 2S-T) Screw the compression gauge into the glow plug hole.
- b) (Gasoline engines) Fully open the throttle. While cranking the engine over with the starter, measure the compression pressure.
Note: Always use a fully charged battery to get an engine speed of 250 rpm or more.
Note: measurements should be taken in the shortest possible time.
- Rated pressure:
- 3S-FE, 4A-FE, 4S-FE, 5E-FE, 7A-FE - 13.0 bar or more
- 3S-GE - 12.5 bar
- 2C. 2S-T - 30 bar
- Minimum pressure:
- 3S-FE, 4A-FE, 4S-FE, 7A-FE - 9.5 bar
- 3S-GE, 5E-FE - 10.0 bar
- 2C, 2C-T - 25 bar
- Pressure differences between cylinders:
- 3S-FE, 3S-GE, 4A-FE, 4S-FE, 5E-FE, 7A-FE - no more than 1.0 bar
- 2С, 2С-Т - no more than 5.0 bar
- G) Repeat steps with (A) By (V) for each cylinder.
- d) If the compression end pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps from (A) By (V) for cylinders with low compression pressure.
- If adding oil increases the compression pressure, the piston rings and/or cylinder bore may be worn or damaged
- If the pressure remains low, the valve may be sticking or not seated tightly, or there is a leak at the cylinder head gasket. (Gasoline engines)
10. Install spark plugs.
- Tightening torque - 18 Nm
11. Connect the high voltage wires to the spark plugs.
12. Connect the connectors of the distributor or the complex ignition unit.
13. (3S-GE) Connect the cold start injector connector. (Diesel engines)
14. Connect the wire to the fuel cutoff solenoid valve connector.
15. Install glow plugs.
- A) Close the glow plugs.
- b) Install the glow plug bar, tighten the nuts and install the seals.