Teledyne Continental Motors, Inc.
TM
Torque
Specifications
IOF-550 Permold Series Engine Maintenance Manual
B-9
1 April 2007
Table B-4.
Component Specific Torque Specifications
Torque Value
SIZE
FASTENER
IN./LB.
FT/LB.
MODELS AFFECTED
Gears
.31-24
Bolt-Gear to camshaft
240-260
20.0-21.7
E-Series, IO-360, L/TSIO 360, IO-346,
O-470, IO-470, IOF-550, TSIO-470,
IO-520, L/TSIO- 520 GTSIO-520, IO-
550, TSIO-550, TSIOL-550, TSIOF-
550
.31-24
Bolt-Gear to crankshaft.
(Bolt hardness RC 38-42)
380-420
31.7-35.0
O-470, IO-470, TSIO-470, IO-520,
L/TSIO 520, IOF-550, GTSIO-520, IO-
550, TSIO-550, TSIOL-550, TSIOF-
550
.31-24
Bolt-Face gear to
crankshaft.
140-150
11.7-12.5
IO-346, GIO-470, IO-520(AR) L/TSIO-
520(AR), GTSIO-520, IO-550, IOF-
550, TSIO-550, TSIOL- 550.
.44-20
7/16-20
Nut-Connecting rod-
Spiralock
(Nut hex P/N 643215 with
bolt P/N 643112)
550-600
45.8-50.0
L & IO-520-P, L & TSIO-520 AE & CE,
IO-550, IOF-550, TSIO-550,
TSIOF-550, TSIOL-550
Miscellaneous Fuel Injection
#8-32 Screw-Manifold
Cover
hold
down (AN503-8-12)
22-26
1.8-2.2
All fuel injected models, as required
.125-27 Fitting-Cover
vapor
separator fuel pump
60-80
5.0-6.7
All fuel injected models, as required
.125-27 Nozzle-Fuel
injector(with
anti-seize compound)
55-65
4.6-5.4
All fuel injected models, as required
.19-24
Through-bolt, fuel pump
29-31
2.4 -2.6
All fuel injected models, as required
.25-28
Ejector - Fuel Pump Vapor
Separator Cover
90-100
7.5-8.3
All fuel injected models (AR)
.31-24 Nozzle-Fuel
injector(with
anti-seize compound)
55-65
4.6-5.4
All fuel injected models, as required
.31-24
Nut- Throttle and mixture
control levers to shaft
100-120
8.3-10.0
All fuel injected models, as required
.31-32
Nut-Fuel injection line
40-45
3.3-3.7
All fuel injected models, as required
.38-24
Nut-Fuel injection line
55-60
4.5-5.0
All fuel injected models, as required
.62-18
Plug & Screen assy.
Metering Unit new gasket
120-130
10.0-10.8
All fuel injected models, as required
Miscellaneous Lubrication System Fasteners
.25-20
Bolt-Oil cooler to adapter
100-110
8.3-9.2
IO-360, L/TSIO-360, O-470, IO-470,
TSIO-470, IO-520, TSIO-520(AR), I0-
550, IOF-550 TSIO-550 TSIOL-550,
TSIOF-550
.25-20 Bolt-Oil
pump
cover
crankcase
75-85
6.3-7.1
All models as required
.25-28
Nut-Collar assembly
governor oil transfer.
75-85
6.3-7.1
O-470, IO-470, TSIO-470, IO- 520,
TSIO-520, IO-550, IOF-550, TSIO-
550, TSIOL-550, TSIOF-550
.62-18
Plug-Oil cooler (using crush
washer)
190-210
15.8-17.5
All models, as required.