Usage:
New oil pumps that have an internal bypass valve, plus necessary additional parts, are the service replacement for the pump groups in the above chart. The new pumps decrease the possibility of oil leaks, because less external lines are used.
(1) Remove oil pressure relief valve (1), tee (2), tube (3), engine oil pump (4) and any brackets not needed.
G399
(1) Install a 3P0656 O-ring Seal in the groove of 5N7858 Cover (1). Fasten cover (1) to the oil pan with two 0S1594 Bolts (2) and 5M2894 Washers. Install 5N7868 Pump Group (3) with the former bolts. Install 5N4411 Special Bolt (4). Put 3P0656 O-ring Seal (5) in position in the flange of 5N7855 Tube (6). Install tube (6) on pump group (3) with the former bolts and washers. Fasten 5N7856 Bracket (7) and a 6H7127 Lug in position with 0S1591 Bolt (8) and a 5M2894 Washer. Put 3P0649 O-ring Seal (9) in position on tube (6). Lubricate seal (9) with engine oil. Put 3P0651 O-ring Seal (10) in position in flange (11). Put 5N7848 Tee (12) in position on tube (6) and install former bolt (13) and the washer. Install 3B1915 Bolt (14) and a 5M2894 Washer. Put 5N7857 Bracket (15) and two 6H7127 Lugs in position and install two 0S1591 Bolts (8) and 5M2894 Washers. Install two 0L1351 Bolts (16) and 5M2894 Washers. Make any other necessary connections.
G379, G398
(1) Install a 3P0656 O-ring Seal in the groove of 5N7858 Cover (1). Fasten cover (1) to the oil pan with two 0S1594 Bolts (2) and 5M2894 Washers. Install 5N7892 or 5N7896 Pump Group (3) (see note below) with the former bolts. Install 5N4411 Special Bolt (4). Put 3P0656 O-ring Seal (5) in position in the flange of 5N7851 or 5N7853 Tube (6) (see note below). Install tube (6) on pump group (3) with the former bolts and washers. Fasten 5N7856 Bracket (7) and a 6H7127 Lug in position with 0S1591 Bolt (8) and a 5M2894 Washer. Put 3P0649 O-ring Seal (9) in position on tube (6). Lubricate seal (9) with engine oil. Put 3P0651 O-ring Seal (10) in position in flange (11). Install 7B9665 Pipe Plug (12) in 5N7848 Tee (13). Put tee (13) in position on tube (6) and install former bolt (14) and the washer. Install 3B1915 Bolt (15) and a 5M2894 Washer. Put 5N7857 Bracket (16) and two 6H7127 Lugs in position and install two 0S1591 Bolts (8) and 5M2894 Washers. Install two 0L1351 Bolts (17) and 5M2894 Washers.
NOTE: On G379 Engine that had former 1W1872 Pump Group, use 5N7892 Pump Group and 5N7851 Tube. On G398 Engine that had former 1W1881 Pump Group, use 5N7896 Pump Group and 5N7853 Tube.
D399
(1) Install a 3P0656 O-ring Seal in the groove of 5N7858 Cover (1). Fasten cover (1) to the oil pan with two 0S1594 Bolts (2) and 5M2894 Washers. Install 5N4412 Pump Group (3) with the former bolts. Install 5N4411 Special Bolt (4). Put 3P0656 O-ring Seal (5) in position in the flange of 5N7855 Tube (6). Install tube (6) on pump group (3) with the former bolts and washers. Fasten 5N7856 Bracket (7) and a 6H7127 Lug in position with 0S1591 Bolt (8) and a 5M2894 Washer. Put 3P0649 O-ring Seal (9) in position on tube (6). Lubricate seal (9) with engine oil. Put 3P0651 O-ring Seal (10) in position in flange (11). Put 5N7849 Tee (12) in position on tube (6) and install former bolt (13) and the washer. Install 3B1915 Bolt (14) and a 5M2894 Washer. Put 5N7857 Bracket (15) and two 6H7127 Lugs in position and install two 0S1591 Bolts (8) and 5M2894 Washers. Install two 0L1351 Bolts (16) and 5M2894 Washers. Put an 8F6711 O-ring Seal in the groove of 3J2903 Cover (17). Fasten cover (17) in position on tee (12) with four 0S1595 Bolts (18) and 5P8245 Washers. Make any other necessary connections.
D379, D398
(1) Install a 3P0656 O-ring Seal in the groove of 5N7858 Cover (1). Fasten cover (1) to the oil pan with two 0S1594 Bolts (2) and 5M2894 Washers. Install 5N7890 (D379) or 5N7894 (D398) Pump Group (3) with the former bolts. Install 5N4411 Special Bolt (4). Put 3P0656 O-ring Seal (5) in position in the flange of 5N7851 (D379) or 5N7853 (D398) Tube (6). Install tube (6) on pump group (3) with former bolts and washers. Fasten 5N7856 Bracket (7) and a 6H7127 Lug in position with 0S1591 Bolt (8) and a 5M2894 Washer. Put 3P0647 O-ring Seal (9) in position on tube (6). Lubricate seal (9) with engine oil. Put 3P0651 O-ring Seal (10) in position in flange (11). Install 7B9665 Pipe Plug (12) in 5N7849 Tee (13). Put tee (13) in position on tube (6) and install former bolt (14) and the washer. Install 3B1915 Bolt (15) and a 5M2894 Washer. Put 5N7857 Bracket (16) and two 6H7127 Lugs in position and install two 0S1591 Bolts (8) and 5M2894 Washers. Install two 0L1351 Bolts (17) and 5M2894 Washers. Put an 8F6711 O-ring Seal in the groove of 3J2903 Cover (18). Fasten cover (18) in position on tee (13) with four 0S1595 Bolts (19) and 5P8245 Washers.