74313A 4 Mercruiser MAIN BEARING ASSEMBLY (.010 U.S.)

Start By:
Remove low-pressure aftercooler.
Illustration 1 g06072158
Remove bolts (4) and bracket (2). Remove P-clip (1). Remove bolts (5) and position tube assembly (3) out of the way.
Illustration 2 g06072176
Remove tube assembly (6). Disconnect tubes assembly (7).
Illustration 3 g06072189
Illustration 4 g06072197
Loosen nut (8). Remove bolts (9). Remove bolts (11) and remove tube assembly (10).
Illustration 5 g06072224
Illustration 6 g06072240
Remove P-clip (12) and P-clip (13). Remove two bolts (14) and two bolts (15). Remove P-clip (17) and P-clip (18). Remove two bolts (20) and two bolts (21). Remove tube assembly (16) and tube assembly (19).
Illustration 7 g06072779
Remove bolt (24). Remove seventeen bolts (22). Remove oil cooler assembly (25) and gasket (23).
Illustration 8 g06072802
Remove plug (26) and plug (27). Remove plug (28) and plug (30). Remove adapter (29).
Illustration 9 g06072849
Remove bolts (31) and washers (32). Remove oil cooler cover (33).
Illustration 10 g06072862
Remove O-rings (34) from engine oil cooler (35).Installation Procedure
Install engine oil cooler (35) in the reverse order of removal.
Tighten bolts (31) to a torque of 25 3 N m (221 27 lb in).
Tighten plug (30) to a torque of 80 8 N m (59 6 lb ft).
Tighten adapter (29) to a torque of 60 6 N m (44 4 lb ft).
Tighten plug (28) to a torque of 31 3 N m (274 27 lb in).
Tighten plug (27) to a torque of 80 8 N m (59 6 lb ft).
Tighten plug (26) to a torque of 80 8 N m (59 6 lb ft).
Illustration 11 g06072474
Tighten bolts (22) and bolt (24) to a primary torque of 12 4 N m (106 35 lb in) in the order depicted in illustration 11. Next, tighten bolts (22) and bolt (24) to a final torque of 25 3 N m (221 27 lb in) in the order depicted in illustration 11.
Tighten bolts (21) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (20) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (18) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (17) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (15) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (14) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (13) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (12) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (11) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (9) to a torque of 25 3 N m (221 27 lb in).
Tighten bolts (8) to a torque of 60 6 N m (44 4 lb ft).
Tighten bolts (7) to a torque of 40 4 N m (29 3lb ft).
Tighten tube assembly (6) to a torque of 30 3 N m (266 27 lb in).
Tighten bolts (5) to a torque of 45 5 N m (33 4 lb ft).
Tighten bolts (4) to a torque of 23 2 N m (204 18 lb in).
Tighten bolts (1) to a torque of 23 2 N m (204 18 lb in).