Geely Emgrand X7. Manual part — 267

2.14.7 Diagnostic message and steps

2.14.7.1 Diagnosis descriptions

Refer to 2.14.2.1 Description and Operation, get familiar with the system functions and operation
before starting system diagnosis, so that it will help to determine the correct diagnostic steps, more
importantly, it will also help to determine whether the situation described by the customer is
normal.

2.14.7.2 Visual inspection

z Inspect installed aftermarket equipment that may affect the operation of the lubrication

system.

z Inspect easy to access system components to identify whether there are significant blockages

or leakage. If there is leakage, confirm whether it is engine oil leak.

z Inspect whether the oil filter is dirty or blocked. If necessary, replace it.

2.14.7.3 Diagnosis of Engine Oil Abnormal Consumption

When the engine oil consumption (non-leaking) exceeds the acceptable range, abnormal engine oil
consumption diagnostic must be carried out.

1

Inspect whether the fuel is normal.

2

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

3

Inspect whether the vehicle sustained high speed / or excessive use.

4

Inspect whether the positive crankcase ventilation system is blocked and whether the
components are working correctly.

5

Inspect whether the valve conduit / or the valve rod is worn, whether the valve rod oil
seal is worn, missing or improperly installed.

Yes

Repair the faulty components.

No

Yes

Service the engine.

No

Yes

Replace the oil filter and engine oil

No

Yes

Refer to 2.9.7.5 Engine Oil Leak
Diagnostic

No

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6

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

7

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

8

Confirm that the fault has been fixed.

Next

Yes

Repair the faulty parts.

No

Yes

Repair the faulty parts.

No

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2.14.7.4 Engine Oil Pressure Diagnostic and Test

1

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

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.

3

If necessary, add the recommended grade engine oil, until the engine oil level reaches
the full scale.

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.

5

Check whether there is noise or knock sound in the valve system.

6

Inspect 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 gauge is incorrect or faulty.

H. Engine oil viscosity is not suitable for the expected temperatures.

7

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

Yes

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

No

Next

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8

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

9

Start the engine and measure engine oil pressure.

10

Compare the readings with the pressure value in 2.14.1.2 Mechanical System
Specification. If the engine oil pressure is less than the specified value. Inspect
whether there are one or more of the following conditions:

A. The bolts of oil filter are 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.

The engine oil way hole plug is missing or improperly installed.

J.

The intermediate drive shaft bolt for camshaft is loosened.

K. The following components bearing clearance exceed the acceptable tolerance range:

a) Link

b) Crankshaft

c) Camshaft

d) Sprocket of the intermediate drive shaft of camshaft

L. Engine oil channel cracking. There are pores or blockage.

M. Valve tappet rod broken.

When necessary, repair or replace the relevant components.

11

Test is completed.

Next

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