6 CYLINDER ENGINE 0 423 GASKET Engine Valve Rocker Arm Cover 82 84 X 2 8X Z 14089252 2 N L GASKET RKR CVR PGO 16 80 85 X 2 8X 14089252 2 N L GASKET RKR CVR PGO 16 80 85 X 2 8W 14089253 2 6 65 GASKET RKR CVR PGO 21 47 82 83 B 231A 3 8 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 82 84 B 4 1 4 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 82 83 C 4 1 4 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 82 83 E 231A 3 8 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 82 84 E 4 1 4 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 82 83 G 231A 3 8 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 82 84 G 4 1 4 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 84 D 4 1 4 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 84 85 E 231 9 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 84 85 G 231 9 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 85 B 231A 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 85 G 231A 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 86 87 G 3 8 7 231A 25523348 2 N L GASKET VLV RKR ARM CVR PGO 25 43 0 426 ROD Engine Valve Push NOTE 1 1ST DESIGN 14 BOLT OIL PAN EDGE OF CM SHF CAST DIMPLES MARKED WITH GREEN PAINTZ NOTE 2 2ND DESIGN 14 BOLT OIL PAN EDGE OF CM SHF WITHOUT CAST DIMPLES OR ALL 20 BOLT OIL PAN MARKED WITH YELLOW PAINT 82 84 G 4 3V 22511044 12 4 05 ROD EXH PUSH PGO 64 74 82 84 B 231A 1ST DESIGN 1249139 12 5 15 ROD PUSH NOTE 1 PGO 55 52 82 84 B 231A 2ND DESIGN 25510025 12 5 45 ROD PUSH NOTE 2 PGO 25 54 82 84 G 231A 1ST DESIGN 1249139 12 5 15 ROD PUSH NOTE 1 PGO 55 52 82 84 G 231A 2ND DESIGN 25510025 12 5 45 ROD PUSH NOTE 2 PGO 25 54 84 B 4 1 4 1ST DESIGN 1249139 12 5 15 ROD PUSH NOTE 1 PGO 55 52 84 B 4 1 4 2ND DESIGN 25510025 12 5 45 ROD PUSH NOTE 2 PGO 25 54 84 D 4 1 4 1ST DESIGN 1249139 12 5 15 ROD PUSH NOTE 1 PGO 55 52 84 D 4 1 4 2ND DESIGN 25510025 12 5 45 ROD PUSH NOTE 2 PGO 25 54 84 E 4 1 4 1ST DESIGN 1249139 12 5 15 ROD PUSH NOTE 1 PGO 55 52 84 E 4 1 4 2ND DESIGN 25510025 12 5 45 ROD PUSH NOTE 2 PGO 25 54 84 G 4 1 4 1ST DESIGN 1249139 12 5 15 ROD PUSH NOTE 1 PGO 55 52 84 G 4 1 4 2ND DESIGN 25510025 12 5 45 ROD PUSH NOTE 2 PGO 25 54 82 83 B 4 1 4 1249139 12 5 15 ROD PUSH PGO 55 52 82 83 C 4 1 4 1249139 12 5 15 ROD PUSH PGO 55 52 82 83 E 4 1 4 1249139 12 5 15 ROD PUSH PGO 55 52 82 83 E 231 3 8 9 25510025 12 5 45 ROD PUSH PGO 25 54 82 83 G 4 1 4 1249139 12 5 15 ROD PUSH PGO 55 52 82 83 G 231 3 8 9 25510025 12 5 45 ROD PUSH PGO 25 54 82 85 X 2 8W X Z 476525 12 6 65 ROD PUSH PGO 15 25 84 85 E 231 9 25510025 12 5 45 ROD PUSH PGO 25 54 84 85 G 231 9 25510025 12 5 45 ROD PUSH PGO 25 54 85 B 231A 25510025 12 5 45 ROD PUSH PGO 25 54 85 G 231A 25510025 12 5 45 ROD PUSH PGO 25 54 86 87 G 3 8 7 231A 25510025 12 5 45 ROD PUSH PGO 25 54 0 429 NUT PIVOT STUD Engine Valve Adjusting 82 85 X 2 8W X Z 477212 12 88 NUT VLV RKR ARM PGO 15 19 82 84 G 4 3V 22527956 6 N L PIVOT VLV RKR ARM PGO 64 69 82 85 X 2 8W X Z 476530 12 1 40 STUD VLV RKR ARM BALL PGO 15 22 0 439 GUIDE Engine Valve Push Rod 82 85 X 2 8W X Z 476531 6 1 70 GUIDE PUSH ROD PGO 15 23 0 459 LIFTER Engine Valve 82 83 B 4 1 4 5233005 12 7 95 LIFTER VLV 010 O S 82 83 B 231A 5233005 12 7 95 LIFTER VLV 010 O S 82 84 B 4 1 4 5234485 12 N L LIFTER VLV STD PGO 25 55 82 85 B 231A 5234485 12 N L LIFTER VLV STD PGO 25 55 82 83 C 4 1 4 5233005 12 7 95 LIFTER VLV O10 0 S 82 83 C 4 1 4 5234485 12 N L LIFTER VLV STD PGO 25 55 82 83 E 4 1 4 5233005 12 7 95 LIFTER VLV 010 O S 82 83 E 231 3 8 5234345 12 21 30 LIFTER VLV O10 0 S PGO 25 55 82 84 E 231 3 8 9 5234485 12 N L LIFTER VLV STD PGO 25 55 82 84 E 4 1 4 5234485 12 N L LIFTER VLV STD PGO 25 55 82 83 G 4 1 4 5233005 12 7 95 LIFTER VLV 010 0 S 82 83 G 231A 5233005 12 7 95 LIFTER VLV O10 O S 82 83 G 231 3 8 5234345 12 21 30 LIFTER VLV O10 0 5 PGO 25 55 82 84 G 231 3 8 9 5234485 12 N L LIFTER VLV STD PGO 25 55 82 84 G 4 1 4 5234485 12 N L LIFTER VLV STD PGO 25 55 82 85 G 231A 5234485 12 N L LIFTER VLV STD PGO 25 55 82 G 4 3V 5234625 12 N L LIFTER VLV RLR PGO 63 34 i 1991 GENERAL MOTORS SERVICE PARTS 0PERAT 0NS BUICK 44W 0 423 0 459 0 44 6 91