Mercury D4.2L D-Tronic

ENGINE MECHANICAL
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 3A-23
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.
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. One at a time loosen each center bolt and torque as indicated.
a. First pass:
Engine
Sequence Torque
D2.8L Center Bolts 3-2-1-4-5-8-9-10-7-6 30 Nm (22 lb-ft)
D4.2L Center Bolts 11-12-13-14-10-9-8-4-3-2-1-5-6-7 30 Nm (22 lb-ft)
b. Second pass:
Engine
Sequence Torque Angle
D2.8L Center Bolts 3-2-1-4-5-8-9-10-7-6 + 120 Degrees
D4.2L Center Bolts 11-12-13-14-10-9-8-4-3-2-1-5-6-7 + 120 Degrees
4
1
2
3
6
8
9
10
75
77114
2
1
5
6
7
8
9
10
11
12
13
14
3
4
77113
a
b
Center Bolt Torque Sequence Diagram
a-D2.8L D-Tronic Engine
b-D4.2L D-Tronic Engine