Continental Refrigerator Permold IOF-550-B, Maintenance Manual

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Teledyne Continental Motors, Inc.
TM
Non-Overhaul Removal and Replacement
IOF-550 Permold Series Engine Maintenance Manual 10-81
1 April 2007
10-8.5.2. IOF-550-B & C Series Engines Cylinders Service Limits
Table 10-10. IOF-550-B & C Cylinder Assembly Service Limits
Refer to Figure 10-63
Item # Description Service
Limit
(inches) New Part
Minimum
(inches) New Part
Maximum
(inches)
Cylinder Assembly
1 Cylinder bore (lower 4-1/4 inch of barrel) diameter Figure 10-64
2 Cylinder bore choke (at 5.75 inch from open end of
barrel) taper Figure 10-64
3 Cylinder bore out-of-round 0.003 0.0000 0.001
4

Cylinder bore allowable oversize Figure 10-64
5 Cylinder bore surface roughness (Nitride Barrels) using
180 grit stone, cross hatch angle
Finish (in micro inches) R
a
22° - 32°
30-50 22° - 32°
35 -
60
6 Cylinder barrel in crankcase diameter 0.013L 0.0040L 0.0100L
7 Intake valve seat insert in cylinder head diameter 0.009T 0.009T 0.012T
8 Intake valve guide in cylinder head diameter 0.001T 0.0010T 0.0025T
9 Exhaust valve guide in cylinder head diameter 0.001T 0.0010T 0.0025T
10 Exhaust valve seat insert in cylinder head diameter 0.007T 0.0070T 0.0100T
11 Intake valve seat width Figure 10-67
12 Exhaust valve seat width Figure 10-68
Exhaust valve seat-to-valve guide axis angle 45°-00' 45° 00' --
Intake valve seat-to-valve guide axis angle 60°-15' 59° 45' 60° 15'
Rocker Arms and Shafts
13 Rocker shaft in cylinder head bosses diameter 0.0025L 0.0002L 0.0025L
Rocker shaft in rocker arm bushing diameter 0.0040L 0.0010L 0.0028L
14 Rocker arm bushing bore diameter 0.8755 0.8725 0.8755
Rocker arm bushing (inside) - finish bore diameter 0.7515 0.7505 0.7515
15 Rocker Arm side clearance 0.0350L 0.0020 0.0150
16 Intake valve guide inside diameter
Intake valve in guide diameter
0.0050L 0.4350
0.0010L 0.4362
0.0032L
17 Exhaust valve guide inside diameter
Exhaust valve in guide diameter
0.0062L 0.4370
0.0029L 0.4380
0.0046L
18 Intake valve face-to-stem axis angle 60°-15' 60°00' 60°15'
19 Exhaust valve face-to-stem axis angle 45°-30' 45°00’ 45°15'
20 Intake valve face gauge line-to-stem length 4.714 Figure 10-69
21 Exhaust valve face-to-stem length Replace 100%
22 Intake valve seat-to-stem run-out 0.0040 0.0000 0.0015
23 Rocker arm foot-to-valve stem (dry valve gear lash) : 0.060 to
0.2000 0.060 0.200
Pistons, Rings, and Pins
24 Piston moly-coated (bottom of skirt) in cylinder diameter 0.0110L 0.0078L
0.0108L
25 Top piston ring in groove side clearance 0.006L 0.0015 0.0040
26 Second piston ring in groove side clearance 0.006L 0.0015 0.0040
27 Third piston ring in groove side clearance 0.0075L 0.0035 0.0055
28 Fourth piston ring in groove side clearance 0.0100L 0.0060 0.0080