Chery A15. Manual - part 136

Valve Stem Size And Fit Clearance 
 

Intake valve (unit: mm) 

Exhaust valve (unit: mm) 

Class 

Diameter of 

valve stem 

Inner 

Diameter of 

valve guide

Clearance

Diameter of 

valve stem 

Inner 

Diameter of 

valve guide 

Clearance

Standard 

8.043

 

0

018

.

0

+

−

8.063~8.09

4 

8.017

 

0

018

.

0

+

−

8.063~8.094 

Oversized 

by 0.4 

8.443

 

0

018

.

0

+

−

8.463~8.49

4 

0.02 

~ 

0.069 

8.417

 

0

018

.

0

+

−

8.463~8.494 

0.046 

~ 

0.095 

 

 

Size of Intake Valve Seat Ring And Cylinder Head Seat Ring Bore                             
 

Class 

Diameter of intake valve 

seat ring (unit: mm) 

Diameter of the seat ring 

bore of cylinder head 

(unit: mm) 

Interference 

(mm) 

480 engine 

43.877

 

01

.

0

01

.

0

+

−

43.763

 

025

.

0

0

+

Oversized by 0.5 

44.377

 

01

.

0

01

.

0

+

−

44.263

 

025

.

0

0

+

Oversized by 1.0 

44.877

 

01

.

0

01

.

0

+

−

44.763

 

025

.

0

0

+

0.079~ 

0.124 

 

Size of Exhaust Valve Seat Ring And Cylinder Head Seat Ring Bore 

 

Class 

Diameter of exhaust 

valve seat ring 

(mm) 

Diameter of cylinder 

head seat ring bore 

(mm) 

Interference 

(mm) 

480 and others 

38.877

 

01

.

0

01

.

0

+

−

38.263

 

025

.

0

0

+

Oversized by 0.5 

39.377

 

01

.

0

01

.

0

+

−

38.763

 

025

.

0

0

+

Oversized by 1.0 

39.877

 

01

.

0

01

.

0

+

−

39.263

 

025

.

0

0

+

0.079~0.124 

UAES’s new two-valve   

38.377

 

01

.

0

01

.

0

+

−

38.263

 

025

.

0

0

+

Oversized by 0.5 

38.877

 

01

.

0

01

.

0

+

−

38.763

 

025

.

0

0

+

Oversized by 1.0 

39.377

 

01

.

0

01

.

0

+

−

39.263

 

025

.

0

0

+

0.079~0.124 

 

TD-4

Size of Valve Guide And Valve Guide Bore 
 

Class 

Valve guide bore   

(unit: mm) 

Diameter of cylinder head 

guide hole (unit: mm) 

Interference      

(unit: mm) 

Standard 

13.555

 

0

01

.

0

−

13.481—13.519 

Oversized 

14.305

 

0

01

.

0

−

14.231—14.269 

Oversized 

14.505

 

0

01

.

0

−

14.481—14.519 

0.026—0.07 

 
 
Size of Cylinder Bore 

 

 

480 M cylinder bore (unit: mm) 

480 E cylinder bore (unit: mm) 

1 79.94-79.95 1  79.94-79.95 

2 79.95-79.96 2  79.95-79.96 

3 79.96-79.97 3  79.96-79.97 

Ex-factory 

grouping 

4 79.97-79.98 4  79.97-79.98 

A 80.23-80.24 A  80.23-80.24 

B 80.24-80.25 B  80.24-80.25 

Ex-factory repair 

C 80.25-80.26 C  80.25-80.26 

Standard 79.965-77.975

Standard  79.965-77.975 

Oversized by 

0.29 

80.245-80.255

Oversized by 

0.29 

80.245-80.255 

For 

Maintenance 

Oversized by 0.5

80.466-80.475

Oversized by 0.5 

80.466-80.475 

 

 

 
 
 
 
 

TD-5

The Diameter of Piston Skirt 

 

 

Diameter of 480M piston skirt 

(unit: mm) 

Diameter of 480E 

piston skirt (unit: 

mm) 

Diameter of UMC’s 

new two-valve piston 

skirt (unit: mm) 

1 79.91-79.92 

79.915-79.925 

79.915-79.925 

2 79.92-79.93 

79.925-79.935 

79.925-79.935 

3 79.93-79.94 

79.935-79.94 

79.935-79.94 

Ex-factory 

grouping 

4 79.94-79.95 

79.945-79.955 

79.945-79.955 

A 80.20-80.21 

80.205-80.215 

80.205-80.215 

B 80.21-80.22 

80.215-80.225 

80.215-80.225 

Ex-factory 

repair 

C 80.22-80.23 

80.225-80.235 

80.225-80.235 

Standard 79.93-79.955 

79.965-79.975 

 

Oversized by 

0.29 

80.21-80.235 80.245-80.255 

 

Spare parts 

Oversized by 

0.5 

80.43-80.455 80.465-80.475  80.435-80.455 

 
 

The Diameter of Piston Pin Bore 
 

Diameter of 480M piston pin bore (unit: mm)

Diameter of 480E piston pin bore (unit: mm)

White 20.630-20.633 White 20.630-20.633 

Red 20.633-20.636 Red 20.633-20.636 

Blue 20.636-20.639 Blue 20.636-20.639 

TD-6

 
 
 

The Diameter of The Piston Pin 

 

Diameter of 480M piston pin bore (unit: mm) 

Diameter of 480E piston pin bore (unit: mm) 

White 20.622-20.625 

White 20.622-20.625 

Red 20.625-20.628 

Red 20.625-20.628 

Blue 20.628-20.631 

Blue 20.628-20.631 

 

The End Clearance of The Piston Ring 

 

First compression ring: 0.30-0.50mm 
Second compression ring: 0.30-0.50mm 
Oil ring: 0.40-1.40mm 

 
 

 

The Axial Clearance of Piston Ring In The Piston Groove 

 

 

Height of the piston 

ring (unit: mm) 

Size of piston ring 
groove (unit: mm) 

Fit clearance 

(unit: mm) 

First compression ring 

1.60 1.6 

0.050-0.082 

Second compression ring 

2.0 2.0 

0.050-0.082 

0.61±0.025 

Sealing strip of oil ring 

Spring of oil ring 

2.68±0.05 

 

4.0 

0.01-0.23 

Cast iron oil ring 

4.0 4.0 

0.025-0.055 

0 
-0.012

+0.06
+0.04

0 
-0.012

+0.06
+0.04

+0.03
+0.01

-0.015 
-0.025

+0.03
+0.01

 

 
480 UAES’s New Two-Valve   

 

 

Height of the piston ring (unit: 

mm) 

Size of piston ring groove 

(unit: mm) 

First compression ring 

1.2（-0.03～-0.01） 1.2（0.03～0.05） 

Second compression ring 

1.5（-0.03～-0.01） 1.5（0.02～0.04） 

0.46±0.02 

Sealing strip of oil ring 

Spring of oil ring 

2.75±0.05 

2.0±0.02 

 

3（0.01～0.03） 

 

TD-7