ENGINE MECHANICAL
SERVICE MANUAL NUMBER 22
Page 3A-26
90-860074--1 FEBRUARY 2002
TORQUE PROCEDURE AFTER 20-30 MINUTE BREAK-IN
CAUTION
Avoid component or engine failure. Cylinder heads require additional angular
torque and conventional torque application after the first 20-30 minute break-in and
then, after the first 100 hours or first operating season whichever occurs first.
1. Operate the engine at idle until water temperature reaches 70 degrees C (158
degrees F.). Then operate the engine at 2000 rpm for approximately 20-30 minutes
at normal operating temperature.
2. Let the engine cool down completely (inoperative overnight, if possible).
3. In sequence, and operating on only one bolt at a time, loosen each 14 mm center bolt
and then retorque to 30 Nm (22 lb-ft). Continue by tightening the bolt through an angle
of 65 degrees and then through ANOTHER 65 degrees (130 degrees total).
4. In sequence and without loosening, check torque on port and starboard 12 mm side
bolts to be 90 Nm (66 lb-ft)
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
3
1
2
3
4
6
8
9
11
10
12
13
14
7
5
15
16
17
18
75515
a
b
a
b
Torque Sequence Diagram
a -
Center Bolt Set
b -
Side Bolt Set
