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Page Title:
Table 6-13. Pistons, Piston Rings and Piston Pins overhaul Standards |
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 Table 6-13. Pistons, Piston Rings and Piston Pins overhaul Standards
Sizes and fits
Fig.
Ref.
Wear limits
of new parts
--.
No
letter
Component
Point of measurement
Diameter at bottom of skirt 90 degrees to
5.7415
5.7385 to 5.7435
5.7425
Piston
QQ
piston pin
5.7280
KK
Diameter of top groove in piston (measured
5.7380
5.7480
over 0.11547 dia. pins)
LL
I n s i d e width of top intermediate groove in
0.0990
0.1035
0.1000
piston
MM
0.0980
0.1025
0.0990
Inside width of lower intermediate groove in
piston
NN
0.1910
0.1880
0.1890
Inside width of oil control ring groove in piston
2.0012 to 2.0030
Inside diameter of piston pin bore in piston
2.0018
2.0020
J
1.9998
Piston Pins B-4
Outside diameter of piston pin
2.0000
2.0002
0 . 0 0 0 6 L : to 0.0032L
Fit of piston pin in Piston
0.0016L
0.0020L
J-H
*
Outside diameter of piston pin plugs
0.9975
0.9985
*
Inside diameter of bore in piston pin
1.0005
0.9995
G
*
0.0030L
Fit of piston pin plug in piston pin
0.0010L
F-G
*
0.0600
Gap clearance of top compression ring when
0.0500
CC
Piston Rings B-4
fitted in gage
*
0.0935
0.0925
Outside width of top intermediate compression
EE
ring
0.0110L
0.00075L
0.0055L
Clearance between ring and piston
LL-
EE
*
0.0500
0.0600
Gap clearance of ring when fitted in gage
DD
*
0.0925
0.0935
Outaide width of lower compression ring
GG
0.0100L
0.0045L 0.0065L
Clearance between ring and piston
MM-
GG
*
0.0600
0.0500
Gap clearance of ring when fitted in gage
FF
*
0.1865
0.1850
Outaide width of oil control ring
JJ
0.0060L
0.0040L
0.0015L
Clearance between ring and piston
NN-
JJ
*
0.0300
0.0500
Gap clearance of ring when fitted in gage
HH
Piston Rings B-4
5.7600
C y l i n d e r bore diameter measured up 2.250 5 . 7 5 1 0
5.7530
L
inches from bottom of cylinder skirt
0.0215L
Fit of piston in cylinder bore, measured up 0 . 0 0 7 5 L
0.0115L
00-L
2.250 inches from bottom of cylinder skirt,
90 degrees to piston pin
Refer to paragraph 6-3b for explanation of symbols.
Note.
6-49
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