Geely EC718, EC718RV, EC715, EC715RV. Manual part — 148

No

Step 6

Check whether the piston and piston rings in the cylinder are improperly installed.

Yes

Repair the faulty part.

No

Step 7

Check whether there is correct piston ring seal, whether there are broken or worn piston rings. If necessary,
repair the faulty part.

Next

Step 8

Confirm that the fault has been fixed.

2.9.7.4 Engine Oil Pressure Diagnostic and Test

Step 1

Check whether engine oil viscosity is abnormal. Check whether poor quality engine oil is used.

Next

Step 2

Park the vehicle on a level ground and let the engine run for a few minutes, waiting for a long enough period
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

Step 6

Check whether there are following conditions:

(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.

Engine

Lubricating System JL4G18-D

2-507

Yes

Refer to the user manual, according to local
temperatures, use the Geely Automobile
recommended grade and viscosity engine oil

No

Step 7

Turn the ignition switch to "OFF" position, remove the oil pressure sensor plug.

Next

Step 8

Install the engine oil pressure test tool to the oil pressure sensor plug on the oil filter.

Next

Step 9

Start the engine and measure engine oil pressure.

Next

Step 10

Compare the readings with the pressure value in

2.9.1.2

Oil Pump Specifications

. If the engine oil pressure

is less than the specified value. Check whether there are one or more of the following conditions:

(a)

Oil filter bolts loose.

(b)

Oil filter seat O-ring or seal is missing or damaged.

(c)

Oil pump is worn or dirty.

(d)

Oil pump to cylinder block bolts are loose.

(e)

Oil pump filter loose,blocked or damaged.

(f)

Oil pump filter O-ring missing or damaged.

(g)

Oil Pump Oil Filter pipes damaged or leaking.

(h)

Oil pump pressure regulating valve faulty.

(i)

Engine oily channel plug missing or improperly installed.

(j)

Camshaft intermediate shaft bolts loose.

(k)

The following components bearing clearance exceed the
acceptable tolerance range:
1. Link
2. Crankshaft
3. Camshaft
4. Camshaft Intermediate Shaft Sprocket

(l)

Engine oil channel cracking. There are pores or blockage.

(m) Valve Lifter fracture.

When necessary, repair or replace the relevant parts.

Step 11

End of the test.

2.9.7.5 Engine Oil Leak Diagnostic

Once a vehicle engine oil leak occurs, the following conditions must be checked:

Step 1

Check whether the engine oil level is too high.

Yes

Discharge engine oil to the specified level

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Lubricating System JL4G18-D

Engine

No

Step 2

Check whether the engine oil pressure is too high.

Yes

Check whether the pressure oil filter or the
bypass valve is blocked or malfunction.

No

Step 3

Check whether the engine ventilation system is blocked or malfunction.

Yes

Repair the faulty part.

No

Step 4

Check whether the fasteners are not fastened properly or damaged.

Yes

Replace the damaged parts, tighten the
fasteners again if required.

No

Step 5

Check whether the related parts have gaps or pores.

Yes

Repair the faulty part.

No

Step 6

Check whether the sealing surface is worn. Check whether the sealing gasket is installed properly.

Yes

Repair the faulty part.

Next

Step 7

Confirm that the fault has been fixed.

Engine

Lubricating System JL4G18-D

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2.9.8 Removal and Installation
2.9.8.1 Oil Pump Replacement

Removal Procedure:

Warning!

After a new oil pump is installed, the oil collection filters,
must be inspected. Refer to engine oil pan replacement
and oil collection filters replacement.

FE02-0361b

1.

Disconnect the battery negative cable. Refer to

2.11.8.1

Battery Disconnection

.

2.

Remove the timing chain cover. Refer to

2.6.8.9

Timing

Chain Cover Replacement

.

3.

Remove the timing chain. Refer to

2.6.8.10

Timing Chain

Replacement

.

4.

Remove oil pump bolts.

FE02-0362b

5.

Remove the oil pump from the engine block.

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Engine