Chery S11 / Chery QQ. Manual — part 116

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

33

4 Disassembly and Assembly of Engine Oil Pump

4.1 Structure Diagram

① Seal Ring
② Engine Oil Pump Cover Sheet
③ Engine Oil Pump Inner Rotor
④ Engine Oil Pump Outer Rotor
⑤ Cotter Pin
⑥ Oil Drain Valve Spring base
⑦ Oil Drain Valve Spring
⑧ Slide Block
⑨ Crankshaft Front Oil Seal

⑩ Engine Oil Pump Housing

4.2 Disassembly

4.2.1 ① O-ring

Notice: The O-ring is nonreusable.

4.2.2 Remove the oil pump cover

Notice: If the screws are tightened, use a screw driver

to remove them as indicated in the figure.

4.2.3 Remove the inner rotor, outer rotor of the engine

oil pump.

※ : Components which may

not be reused

Unit: N·m(kg·cm)

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

34

4.2.4 Remove the cotter pin

Notice: The cotter pin is nonreusable.

Notice: When removing the cotter pin, be careful not to

let the spring or the spring seat spring out or fall off

abruptly.

4.2.5

Remove the spring seat of the oil pressure relief

valve for the engine oil pump, the coil spring, oil pump

and oil pressure relief valve etc.

4.2.6

Remove the front crankshaft oil seal.

Notice: The oil seal removed may not be reused.

4.3 Routine Inspection

4.3.1

Inspect the engine oil pump for clearance.

4.3.1.1

According to the marks for inner gear and outer

gear in the engine oil pump, put the gears into the engine

oil pump that is in the cylinder block.

4.3.1.2 Measure the clearance between the inner and

outer gears with a feeler gauge

Standard value: 0.05-0.18mm (average value of 9

positions)

Limit:

0.35 mm

Relief Valve

Slide Block

Relief Spring

Spring Seat

Mark

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

35

4.3.1.3 Measure the clearance between the rotor and

pump body.

Standard value: 0.10-0.181mm

Limit:

0.25 mm

4.3.2

Inspect the oil pressure relief valve

4.3.2.1

No abrasion or scrape shall be found on the oil

pressure relief valve.

4.4 Installation

4.4.1 After the lip of the new oil seal for front crankshaft

is spread with engine oil, fix it with a special tool.

Notice: ·Use new oil seal

·The oil seal should be left less than 0.5 mm at its

outer edge after it is pressed down.

4.4.2 Assembly of the oil pressure relief valve for engine

oil pump and the cotter pin.

Notice: The cotter pin is nonreusable.

Special Tool

Pressed Direction

Inner Side

Oil Seal

Below 0.5mm

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

36

4.4.3

When the outer gear or inner gear is put into the

engine oil pump, its mark should be seen.

4.4.4

The new weather strip should be fixed in the

groove of oil pump cover.

5. Disassembly of Oil Seal

5.1 Structure Diagram

Mark

Components

which

may not be reused