Geely Emgrand X7. Manual part

2.8.8.6 oil cooler replacement (with DSIAuto-transmission )

Dismantlement Procedure

1. Disconnect the battery negative

electrode cable.

Refer

2.12.6.1 Battery Disconnection.

2. For drainage of automatic

transmission oil, refer to 3.4.7.3
Replacement procedures of
automatic transmission oil.

3. Dismantle oil cooler oil inlet

hose 1 .

4. Dismantle oil hose 2 of oil

cooler.

3. Dismantle oil cooler assembly

fixing bolt 3 .

4. Dismantle oil cooler assembly 4.

Installation Procedure:

1. Install oil cooler and tighten

fixing bolt.

2. Connect oil inlet and outlet hose

of oil cooler.

3. Filled Auto-transmission oil .

NL02-2002c

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2 . 9 Lubrication system (4G20/4G24)

2.9.1 Specifications

2.9.1.1 Fastener specifications

Specification

Fastener Name

Model

Metric (N.m)

English system
(lbf-ft)

Oil Pan and Crankcase Connecting
Bolts

M6×14 7-11 5-8

Purge cock

M12×1 . 25×10 . 5

33-37

25-28

Oil Filter Adapter

M24×1 . 5×17

27-33

19-24

Oil Filter Components

UNF3/4

17-23

12-16

Piston injector component and
cylinder block

Connecting Bolts

M6×12 6-8 4-6

Oil pump component and oil
strainer component

Connecting Bolts

M6×30 7-11 5-8

Oil pump component and crankcase

Connecting Bolts

M8×65 17-21

12-15

Oil Pump Mounting Bolt

M6×14

7-11

5-8

2.9.1.2 Oil Pump Specification

Side Clearance

0.05～0.10mm(0.0020～0.0039in)

Tooth Clearance

0.08～0.18mm(0.0031～0.0071in)

Oil pressure alarm device activation pressure ≤40kPa(≤6psi)

Oil Pump Output Pressure

0.77MPa (111.7psi)

Oil Pump Relief Valve Opening Pressure

0.40～0.50MPa(57.8～72.2psi)

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2.9.2 Description and Operation

2.9.2.1 Description and operation

Oil Pan

The oil pan is installed at the bottom of the crankcase. The engine oil pump draws engine oil from
the oil pan. After filtered by the oil filter, the engine oil passes through two oil paths within the
main oil path. The upper oil path heading to the cylinder block and cylinder hood cover
lubricating the relevant friction pairs and components; while the lower oil path heading to the
balance shaft, lubricating its friction pairs. In the main oil path, it has not only five main bearing
lubrication paths but also four piston injector components. The five main bearing lubricant paths
lubricate the main bearing. The oil is injected to the connecting rod through the engine oil path in
the crankshaft to lubricate the connecting rod bearing; the piston injector components take on
pump cooling for the pump. In the upper oil path, the engine oil passes through the oil orifices in
the cylinder body and cylinder hood cover and heads to the camshaft (including OCV valve). The
engine oil passes the internal oil path within the camshaft, lubricating valve assembly, and then
finally returns to the oil pan.

Oil Pump

Oil pump draws the engine oil from the oil pan and then pump the engine oil with pressure to the
various parts of the engine. Oil pump inlet has an oil filter - set filter. Set filter blockage may
damage the oil pump and cause the pump oil inoperative, and the lubricating system will be
unable to establish a normal oil pressure, which will cause the engine mechanical damage. Oil
pump is driven by the crankshaft concave. As long as the crankshaft rotates, the oil pump will be
working. The oil pump displacement is fixed, so when the engine speed is high, the oil pump
output pressure will exceed the needs of the engine lubrication system. There is a safety valve in
the oil pump assembly. The safety pressure relief valve cavity is connected with the oil pump
intake chamber. When the output pressure exceeds 0.40~0.50 MPa (57.8～72.2psi), the security
valve is open, the excess oil returns to the oil pump through the valve. With the normal oil supply,
the safety valve bypass is closed.

Lubrication Descriptions

The oil filter is installed at the bottom of the crankcase. The engine oil passes through the internal
oil path within the crankcase and heads to the filter. After filtering, the engine oil passes through
the internal oil path within the crankcase and heads to the cylinder body and balance shaft, etl. The
engine oil flows into the cylinder hood cover through the frontal oil path of the cylinder body. The
cylinder hood cover oil path is divided into the camshaft and VVT oil path, respectively supplying
the oil for the intake and exhaust camshaft lubrication, as well as the control over the OCV and
VVT.

Each cylinder hood oil path introduces engine oil into the cylinder hood cover and camshaft
bearing journal. Engine oil passes through the main oil path to the VVT solenoid valve, VVT
solenoid valve oil cavity, to the VVT actuator. VVT solenoid valve is used to control intake
camshaft position actuator. Engine Control Module (ECM) controls the VVT solenoid valve.
When the engine control module provides power to the VVT solenoid valve, the solenoid valve
guides the engine oil to flow through the cylinder hood cover camshaft front bearing caps. Engine
oil passes through the intake camshaft bearing caps into the camshaft journal drilled hole and
flows to the intake camshaft front installation surface. Then, the engine oil flows to the camshaft
position actuator corresponding oil path. VVT solenoid valve guides engine oil into the system
corresponding oil path, so that the engine oil pressure acting on the intake camshaft position
actuator internal blades. The intake camshaft (installed on the camshaft position actuator inner
rotor) rotates relative to the sprocket (mounted on the intake camshaft position actuator housing).
At idle, the internal pin will lock the rotor to the intake camshaft actuator housing. When starting,
the cam actuator position will maintain the original position or the default position. VVT solenoid
valve guides engine oil hydraulic pressure to loosen the lock pin, so that the intake camshaft
position actuator works. Cylinder block contains a small engine oil nozzle, which sprays the
engine oil to timing chain components. Engine oil passes through the camshaft timing chain drive

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