Mercruiser Big V8 Marine Engines Fastener Torque Spec’s
454 CID / 7.4L / 502 CID / 8.2L Torque Specifications
|
DESCRIPTION |
Lb. In. |
Lb. Ft. |
N.m |
|
Alternator Brace to Alternator |
192 |
|
9 |
|
Alternator Brace to Marine Engines |
|
30 |
41 |
|
Alternator to Mounting Bracket |
|
35 |
48 |
|
Alternator Mounting Bracket |
|
30 |
41 |
|
Camshaft Sprocket Gear |
|
18 |
24 |
|
Carburetor – Marine Engines |
132 |
|
15 |
|
Connecting Rod Caps (3/8-24 Nuts) (7/16-20 Nuts) |
|
50 |
68 |
|
|
73 |
99 |
|
|
Coupler/Flywheel (MCM) |
|
35 |
48 |
|
Crankcase Front Cover |
120 |
|
14 |
|
Crankshaft Pulley |
|
35 |
48 |
|
Cylinder Head |
|
85 |
115 |
|
Distributor Hold Down |
|
20 |
27 |
|
Exhaust Manifold |
|
30 |
41 |
|
Exhaust Manifold Elbow |
|
30 |
41 |
|
Filter Adapter (5/16-18) |
|
20 |
27 |
|
Flywheel |
|
75 |
100 |
|
Flywheel Drive Plate (MIE) |
|
35 |
48 |
|
Flywheel Housing to Block |
|
30 |
41 |
|
Flywheel Housing Cover |
80 |
|
9 |
|
Front Mount Bracket |
|
30 |
41 |
|
Fuel Pump |
|
25 |
34 |
|
Intake Manifold |
|
35 |
48 (See Note) |
|
Main Bearing Cap |
|
110 |
149 |
|
Oil Baffle Nuts |
|
25 |
34 |
|
Oil Filter Adapter Nuts |
|
40 |
54 |
|
Oil Pan Bolts (5/16-18) |
80 |
|
9 |
|
Oil Pan Drain Plug |
|
15 |
20 |
|
Oil Pump |
|
70 |
95 |
|
Oil Pump Cover |
80 |
|
9 |
|
Power Steering Pump Brace to Block |
|
30 |
41 |
|
Power Steering Pump Bracket |
|
30 |
41 |
|
Rear Mount (MCM) |
|
40 |
54 |
|
Rear Mount (MIE) |
|
50 |
68 |
|
Remote Oil Connector (1/2 in x 13) |
|
25 |
34 |
|
Rocker Arm Cover |
90 |
|
10 |
|
Rocker Arm Bolts 7.4L/454 454 Magnum/502 |
|
40 |
54 |
|
|
45 |
61 |
Note: 7.4L / 454 and 502 MPI engines, Torque intake manifold fasteners to 25-30 Lb. Ft. (34-41 N.m)
454 CID / 74.L / 502 CID / 8.2L Torque Specifications
|
DESCRIPTION |
Lb. Ft. |
N.m |
|
Remote Oil Filter Adapter Nut/Fitting |
20 |
27 |
|
Seawater Pump Brace |
30 |
41 |
|
Seawater Pump Bracket |
30 |
41 |
|
Spark Plugs |
15 |
20 |
|
Starter Motor |
50 |
68 |
|
Thermostat Housing |
30 |
41 |
|
Torsional Damper |
40 |
54 |
|
Transmission To Housing |
50 |
68 |
|
Water Circulating Pump |
35 |
48 |
|
Water Temperature Sender |
20 |
27 |