1221 / 1588
ENGINE
22
PISTON RINGS
Fig. 3
PISTON
PISTON & RINGS:
Fig. 3
Piston selection data :
Cyl. bore dia (mm)
Piston stamped sizes
available for selection
Standard
97.000 + 0.01
96.90/96.89/96.88
Diametral clearance between piston and bore
0.10 to 0.12 mm
(Escorts Pistons)
Permissible difference in weight in a set of four pistons
5 gm maximum
with pin & rings.
Piston pin bore in piston
36.009/36.003
mm
Piston pin outside dia
36.000/35.995
mm
Clearance between piston pin and piston pin bore
0.014-0.003
mm
Distance from piston crown (at TDC) to cylinder
mm
block top surface
Below the block surface
1.25 - 1.60
mm
PISTON RING DATA :
(Dimensions in mm)
Ring Type of piston ring
Width of
Lateral
Butt clearance
groove
ring
clearance
in cyl. bore
No.
groove
in groove
I
Key stone compression ring
2.45 ± 0.015
0.117
0.20
(chrome plated steel ring)
mm
0.062
0.35
ll
Rectangular
2.5
+ 0.070
0.095
0.20
compression ring
mm - 0.050
0.50
0.35
III
Chamfered oil control ring coil
4
+ 0.040
0.065
0.25
backed (cast & chromium plated)
mm - 0.020
0.030
0.40