Cylinder/Piston
   
Reference
 
Standard value
 
Limit value
   
Cylinder nominal diameter
 
88 mm
 
   
Max. ovality
   
0,005
   
Max. taper
   
0,015
Inspection:
Section A: 10 mm from the top edge
Section B: 50 mm from the top edge
Section C: 100 mm from the top edge
 
Diameter
 
Section A
Section B
Section C
 
88.000 mm ÷ 88.010 mm
88.010 mm ÷ 88.020 mm
88.020 mm ÷ 88.030 mm
 
 
Piston-cylinder coupling clearance
   
0.025 ÷ 0.045 mm
 
 
Piston
 
Nominal diameter
 
88 mm
 
 
Diameter
 
Section A
Section B
Section C
 
87.965 mm ÷ 87.975 mm
87.975 mm ÷ 87.985 mm
87.985 mm ÷ 87.995 mm
 
 
Con-rod
 
Con-rod big end diameter
 
43.67 (0 ÷ 0.013) mm
 
   
Crankshaft class
 
Con-rod class
 
Bearing colour
 
Con-rod big end bearing pairing
 
A
B
A
B
 
A
A
B
B
 
Blue + Yellow
Yellow + Yellow
Blue + Blue
Blue + Yellow
 
Con-rod big end bearing-crankshaft journal coupling clearance
 
Pin selection
 
A: Ø40.025 (+0.016; +0) mm
B: Ø40.025 (+0; -0.016) mm
 
 
Piston and gudgeon pin clearance
   
0.015 ÷ 0.024 mm
 
   
Nominal diameter
 
Ø 18 mm
 
   
Piston
 
Ø 18 (+0.020;+0.015) mm
 
   
Gudgeon pin
 
Ø 18 mm (+0; -0.004) mm
 
 
Con-rod and gudgeon pin clearance
   
0.035 ÷ 0.049 mm
 
 
Cylinder compression measured with DDS2
   
11÷12 bar
 
10 bar (MIN.), difference between cylinders: 2 bar (MAX.)