Table 1-2. Repair and Replacement Standards - (Cont)
Components
Connecting rods:
Piston pin diameter
Piston pin bushing length in connecting rod
Piston pin to connecting rod bushing clearance
Bore in connecting rod for piston pin bushing
Exhaust valves:
Valve lift (at valve) w/0.015 inch lash
Valve lift (at cam)
Seat angle
Valve seat contact width
Valve lash (cold)
Valve lash (engine coolant at normal operating
temperature)
Head diameter
Overall length
Stem diameter
Valve must be recessed (in head)
Exhaust and intake valve springs:
Valve spring free length (spring only or spring
w/damper)
Valve spring length (valve closed) (spring only
or spring w/damper)
Valve spring length
(valve open)
(spring only or spring w/damper)
Spring load at 2.237 length spring w/damper
Spring load at 2.237 length
Spring only
Spring load at 1.780 length
Spring w/damper
Spring load at 1.780 length
Spring only
NOTE
Install new spring when old spring is 5% below
the low limit or 5% above the high limit.
Manufacturer’s
dimensions and
tolerances in
inches
Minimum
1.5011
1.490
0.0014
1.6250
1.646
0.3705
0.053
2-17/32
40 lbs
38 lbs
108 lb
95 lbs
Maximum
1.5013
1.510
0.0021
1.6255
0.4125
0.285
30°
3/32
0.018
0.015
1.656
6.017
0.3710
approx
2.237
1.780
46 lbs
42 lbs
115 lbs
105 lbs
Maximum
wear and
clearance
0.0002
0.010
0.001
0.0005
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1/64
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0.010
0.010
0.001
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1-39
