Note: If the engine lacks power, has excessive oil consumption or increased fuel consumption, check the end-of-stroke pressure.
1. Warm up the engine, then stop it.
2. (2L-T) Remove the air filter.
3. Disconnect the fuel shut-off valve connector.
4. (L Series) Remove the glow plugs.
5. (KZ Series) Remove the injectors.
Note: the spark plugs installed on KZ engines are ceramic. It is not recommended to remove the spark plugs unless absolutely necessary.
6. Measure the pressure in the engine cylinders.
a) Install the compression gauge.
b) While turning the crankshaft with the starter, measure the pressure at the end of the compression stroke.
Note: The battery must be fully charged to keep the engine speed at least 250 rpm.
c) Repeat the previous steps for each cylinder.
Note: These measurements must be taken as quickly as possible.
End of compression stroke pressure:
- 2L-T and KZ-T engines - not less than 31.0 bar
- the rest - not less than 32.0 bar
Minimum pressure:
- not less than 20.0 bar
Difference between individual cylinders:
- no more than 5.0 bar
d) If low pressure is detected in one or more cylinders, pour a small amount of engine oil into the cylinder through the glow plug hole, then repeat the test for that cylinder again. If adding oil increases the end of stroke pressure, the piston rings and/or cylinder are worn or damaged.
If the pressure remains low, the valve may be stuck or not seating properly, or there may be a gasket leak.
7. Install glow plugs or injectors.
8. Connect the fuel shut-off valve connector.
9. (For 2L-T engines) Install the air filter.