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7.4L Bravo (Gen 4) GM 454 V-8 1988-1991 - Serial 0B771113 Thru 0D603117 - Crankshaft, Pistons and Connecting Rods

Section Drawing: (Hover or click to view larger)

Ref # Current Part Number Description Superceded From Status Quantity Used
1 879194035 PISTON ASSEMBLY (STANDARD) 6523 SS/NLA 8
1 6615T1 PISTON ASSEMBLY (.030 O.S.) 6615 SS/NLA AR
2 67127 RING SET, Piston - Standard
NLA 8
2 67128 RING SET, Piston - .030 Oversize
NLA AR
44989 818473001 BEARING SET, Main - Standard 818473 SS/ACT 1
44989 818474 BEARING SET, Main - .001 Undersize
NLA AR
44989 818475 BEARING SET, Main - .002 Undersize
NLA AR
44989 818476001 BEARING SET, Main - .010 Undersize 818476 SS/ACT AR
44989 818477 BEARING SET, Main - .020 Undersize
ACT AR
5 843378 PIN, Dowel (1/4 In. Diameter) (1/4" DIA.) 35312 SS/ACT 1
6 8M0062773 SEAL 14756 SS/ACT 1
7 8M0084209 FLYWHEEL 6540 SS/NLA 1
8 8M0214958 SCREW, (.437-20 x 1.00) 49845 SS/ACT 6
9 18643A7 COUPLING ASSEMBLY 18643A2 SS/ACT 1
10 269011 --BUMPER (OLD DESIGN) 26901 SS/ACT 3
10 18644 --BUMPER, Rubber (NEW DESIGN)
ACT 3
11 8M0204643 --SCREW, (.375-16 x 1.12) 14883 SS/ACT 3
12 13510 --WASHER
ACT 3
13 8M0098795 COUPLING ASSEMBLY (Round) 812964A2 SS/ACT 1
14 37612 --SCREW, (.375-16 x 1.250), Round
ACT 6
15 20572 --WASHER, (.390 x .750 x .093), Round
ACT 6
16 8M0030663 CONNECTING ROD 3553 SS/ACT 8
17 52192 --BOLT
NLA 16
18 37493 --NUT, (.375-24)
ACT 16
19 85726001 BEARING SET, Connecting Rod - Standard 85726 SS/ACT 8
19 85727 BEARING SET, Connecting Rod - (.001 Undersize)
NLA AR
19 85728 BEARING SET, Connecting Rod - (.002 Undersize)
NLA AR
19 85691 BEARING SET, Connecting Rod - (.010 Undersize)
ACT AR
19 85729 BEARING SET, Connecting Rod - (.020 Undersize)
ACT AR
20 6612 CRANKSHAFT
NLA 1
21 34466 KEY
ACT 2
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