Chery Fora (Elara A520). Manual - part 50

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

3 

Expansion Tank 

Cap

（kpa） 

Pressure Relief Valve

（Release Pressure to 

Outside

） 

88±14.5 

Vacuum Valve

（Lead Air 

into Tank

） 

-10~~~~-2 

Thermostat 

Working 

Temperature

（ ） 

Start Working 

Temperature 

87 

Full Working 

Temperature 

104 

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

4 

TECHNOLOGY DATA INSTRUCTION 

Item Standard 

Value 

Camshaft 

Cam Height 

Intake cam 

37.15 

Exhaust cam 

37.05 

Camshaft Diameter 

Intake cam 

 

Exhaust cam 

 

Axial clearance of Camshaft 

Intake cam 

0.15--0.20 

Exhaust cam 

0.15--0.20 

Cylinder 

Head 

Plane Degree of Lower Surface 

0.04 

Whole Height 

140±0.41 

Surface Grind Limit* Total Grinding Quantity of 

Cylinder Block and Head 

 

Valve 

Fringe Thickness on Top of Valve 

Intake Valve 

0.3±0.15 

Exhaust Valve 

0.3±0.15 

Valve Stem Diameter 

Intake Valve 

5.98±0.008 

Exhaust Valve 

5.96±0.008 

Seal Bandwidth 

Intake Valve 

 

Exhaust Valve 

 

Gap Between Valve Stem And Guide

Intake Valve 

0.02 

Exhaust Valve 

0.04 

Tilt Angle 

Intake Valve 

65° 

Exhaust Valve 

68° 

Height 

Intake Valve 

107.998 

Exhaust Valve 

106.318 

Valve 

Spring 

Free Height 

47.7 

Working Tension in Advance/ Working Height    Kg /mm

620N/32mm 

Vertical Degree 

 

Valve 

Guide 

Valve Guide Length 

38±0.25 

Inside Diameter 

5.4±0.1 

24

040

.

0

053

.

0

−
−

24

040

.

0

053

.

0

−
−

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

5 

Outer Diameter 

 

Pressure Height 

16±0.3 

Protruding Part of Valve Stem 

47.5 

Piston Piston 

Skirt 

Diameter 

83.46±0.009 

Piston 

Ring 

Side Clearance 

1

st

 Ring 

0.04--0.08 

2

nd

Ring

0.01--0.025

End Play 

1

st

 Ring 

0.2--0.4 

2

nd

Ring

0.4--0.6 

Height 

1

st

 Ring 

 

2

nd

 Ring 

 

Oil Ring 

 

Ring 

Groove 

Height/ Depth 

1

st

 Ring 

 

2

nd

 Ring 

 

Oil Ring

2.5 

Piston Pin 

Diameter 

 

Length 60 

Diameter of Piston Pin Hole 

 

Crankshaft 

Axial Clearance 

0.076--0.265 

Radical Clearance 

-0.0375 

Crankshaft Mainshaft Diameter 

Coaxial Degree 

0.05 

Cylindricity 0.008 

Roundness

0.005 

Connecting Rod Journal Diameter 

Cylindricity  

Roundness

 

Cylinder 

Whole Height 

218±0.05 

Cylinder Hole Roundness / Straightness Accuracy 

0.008 / 0.01 

Upper Surface Planeness 

0.04 

Connectin

g Rod 

Radial Clearance of Connecting Rod Bearing 

0.016--0.051 

Axial Clearance of Big End 

0.15--0.4 

11

051

.

0

040

.

0

+
+

2

.

1

05

.

0

03

.

0

+
+

5

.

1

04

.

0

02

.

0

+
+

5

.

2

03

.

0

01

.

0

+
+

21

0

005

.

0

−

21

008

.

0

002

.

0

2

.

1

01

.

0

03

.

0

−
−

5

.

1

005

.

0

030

.

0

−
−

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

6 

SECTION 2  SPECIAL TOOLS 

 

Camshaft Timing Tool 

 

Crankshaft Timing Tool 

 

Flywheel Tool 

 

Guide Sleeve of Crankshaft Oil 

Seal 

 

Guide Sleeve of Camshaft Oil 

Seal 

 

Hydraulic Hoist