Geely EC718 2009 Workshop Manual page 589

Engine
No
Check whether the piston and piston rings in the cylinder are improperly installed.
Step 6
No
Check whether there is correct piston ring seal, whether there are broken or worn piston rings. If necessary,
Step 7
repair the faulty part.
Next
Confirm that the fault has been fixed.
Step 8
2.9.7.4 Engine Oil Pressure Diagnostic and Test
Check whether engine oil viscosity is abnormal. Check whether poor quality engine oil is used.
Step 1
Next
Park the vehicle on a level ground and let the engine run for a few minutes, waiting for a long enough period
Step 2
of time (2-3 min) to let the engine oil return. Measure whether the engine oil is too low.
Next
Step 3 If necessary, add the recommended grade engine oil, until the engine oil level reaches the full scale.
Next
Step 4 Let the engine run for 10-15 s. Confirm the vehicle indicator does not show that the pressure is too low or
no engine oil pressure.
Next
Step 5 Check whether there is noise or knock sound in the valve system.
Next
Check whether there are following conditions:
Step 6
Lubricating System JL4G18-D
Repair the faulty part.
Yes
(a) Engine oil has bubbles.
(b) Idle speed is too low.
(c) Oil filter is blocked.
(d) Engine oil is diluted by water or the engine coolant and so on.
(e) Oil filter bypass valve is faulty.
(f) Oil pressure warning lamp is incorrect or faulty.
(g) Oil pressure sensor plug is incorrect or faulty.
(h) Engine oil viscosity is not suitable for the expected
temperatures.
EC718/EC718RV EC715/EC715RV 10/2009
2-507