6 CYLINDER ENGINE 0 459 LIFTER Engine Valve 00n t 76 ALL 250 5232720 12 N L I IFTER 80 X 2 13 5233545 12 212 00 I IFTER 010 O S ENGS REO THIS LFTR HAVE 10 STEMP ON LFTR BOSS 80 81 X 2 8 5234212 12 N L I FTER STD 4 0 51 9 CAMSI IAFT Engine NOTE 1 14 bolt oil pan and edge of camshaft with cast dimples NOTE 2 14 bolt oil pan and edge of camshaft without cast dimples 76 77 ALL 231C 1ST DESIGN 1249464 1 106 00 CAMSHAIFT W NON INTEGRAL DISTR DRIVE GR 76 ALL 250 6262809 1 115 00 CAMSHA FT 77 ALL 231A 1255666 1 124 00 CAMSHA FT 77 ALL 2310 2ND DESIGN 1254202 124 00 CAMSHAFT W INTEGRAL DISTR DRIVE GR 78 ALL 231A 2 1255666 124 00 CAMSHAFT 79 A 231 2 2ND DES 25510049 I 124 00 CAMSHAFT NOTE 2 79 80 A B H 231A 1ST DEEEL 1262835 I 124 00 CAMSHAFT NOTE 1 79 80 A B H 231A 2ND DEEEE 25510049 I 124 00 CAMSHAFT NOTE 2 79 ALL 231 2 1ST DES 1262835 1 124 00 CAMSHAFT NOTE 1 79 X 2131A 1262835 1 124 00 CAMSHAFT 80 81 ALL 4 1 1262835 1 124 00 CAMSHAFT 80 81 X 2 8 14024278 1 118 00 CAMSHAFT 81 A B 231A 1ST DES 1262835 1 124 00 CAMSHAFT NOTE 1 81 A B 231A 2ND DES 225510049 1 124 00 CAMSHAFT NOTE 2 0 533 BEARII I G BUTTON SPRIING Engine Camshaft Thrust 76 ALL 250 10000568 1 4 30 BEARING 78 81 ALL 2 5 5 10000568 1 4 30 BEARING 76 81 ALL 231 4 1 1250948 1 2 30 BUTTON CM SHF THR 76 77 ALL 231 1250126 1 I 1 SPRING BUTN W NON INTEGRAL DISTR DRIVE GR 77 ALL 231 1254199 1 I 10 SPRING BUTN W INTEGRAL DISTR DRIVE GR 78 81 ALL 231 4 1 1254199 1 I 1 SPRING THR BUTN 0 539 BEARIII IG Engine Camshaft NOTE 7 14 bolt oil pan NOTE 2 20 bolt oil pan 76 78 ALL 231 1231142 3 3 25 BEARING FRT CTR RR CTR RR 76 78 ALL 231 1234441 1 7 40 BEARING FRT 76 ALL 250 14002525 4 15 65 BEARING 1 2 3 RR 76 81 ALL 4 1 1231142 3 8 25 BEARING 2 3 4 76 81 ALL 4 1 1234441 1 7 40 BEARING 1 79 A 231 2 1ST DES 1231142 1 8 25 BEARING 4 NOTE 1 79 A 231 2 1ST DES 1234441 1 7 40 BEARING 1 NOTE 1 79 A 231 2 2ND DES 25524301 2 7 55 BEARING 1 4 NOTE 2 79 80 A EL H 231A 1ST DEEEB 1231142 1 8 25 BEARING 4 NOTE 1 79 80 A Ei H 231A 2 1231142 2 8 25 BEARING 2 3 79 80 A EL H 231A 1ST DES 1234441 1 7 40 BEARING 1 NOTE 1 79 80 A El H 231A 2ND DES 25524301 2 7 55 BEARING 1 4 NOTE 2 79 X 231A 1231142 3 8 25 BEARING 2 3 4 79 X 231A 1234441 1 7 40 BEARING 1 80 81 X 2 8 14002534 2 14 75 BEARING 2 3 80 81 X 2 8 14002535 1 14 75 BEARING RR 80 81 X 2 8 14033120 1 14 25 BEARING 1 81 A B 231A 1ST DES 1231142 1 8 25 BEARING 4 NOTE 1 81 A B 231A 1231142 2 8 25 BEARING 2 3 81 A B 231A 1ST DES 1234441 1 7 4 BEARING 1 NOTE 1 81 A B 231A 2ND DES 25524301 2 7 55 BEARING 1 4 NOTE 2 0 553 COVE F I PLUG Engine Camshaft NOTE For additional standard size plugs see Groups 8 970 8 971 in the Standard Parts Section NOTE 2 14 bolt oil pan NOTE 3 20 bolt oil paruf 80 81 X 2 8 476544 1 3 00 COVER CM SHE RR 76 78 ALI 231 1363755 1 68 PLUG RR BRG CUP 48 87 MM 76 ALI 250 3994255 1 615 PLUG RR BRG 53 48 MM 76 81 ALI 4 1 1363755 1 68 PLUG RR BRG 48 87 MM 79 A 1231 2 1ST DES 13613755 1 6 8 PLUG RR BRG CUP 48 87 MM NOTE 2 79 A 1231 2 2ND DES 25521361 1 1 05 PLUG RR BRG LOC EXPANSION CUP NOTE 3 79 80 A I3 H 231A 1ST DIES 1363755 1 68 PLUG RR BRG CUP 48 87 MM NOTE 2 79 80 A B H 231A 2ND DEEQS 25521361 1 1 5 PLUG RR BRG LOC EXPANSION CUP NOTE 3 79 X 231A 1363755 1 68 PLUG RR BRG CUP 48 87 MM 1987 GENERAL MOTORS SERVICE PARTS OPIERAT ONS 0LDSMOBILE 231 FIEV 7 87 0 19 0 459 0 553