6 CYLINDER ENGINE 293 BOLT PIN PLUG Engine Cylinder Head C0n t E Ie A 23 I 2i IST DES 255 I8482 AR 1 40 BOLT 7 IK 4 X 3 50 NOTE T Z S A 231 2 IST DES 25525861 AR 7 20 BOLT I6 I4 X 2 69 NOTE 1 79 A 231 2 2ND DES 25525953 AR I4O BOLT CY HD TO CYL BLK INR ROW CTR LOC NOTE 2 4 v A 23I 2 2ND DES v 25525954 AR 340 BOLT CYL HD TO CYL BLK INR ROW CTR END OTR RO N CTR NOTE 2 4 79 80 A B H 231 A IST DES 25518482 AR 1 40 BOLT I6 I4 X 3 50 NOTE I E 9 8G A B H 23IA IST DES 25525861 AR 1 20 BCH 7 16 I I X 2 69 NOTE I 79 8O A I3 H 231A 2ND DES 25525953 AR 1I4O BOLT CYL HD TO CYL BLK INR ROW CTR LOC NOTE 2 I 79 80 A B H 231A 2ND DES 25525954 AR 1 40 BOLT CYL HD TO CYL BLK INR ROVV CTR END OTR ROVV CTR NOTE 2 79 SE ALS I TOOOBYE7 AR 1 50 BOLT IVI II X I 5 X 72 STL I2 9 Nba X 23IA I 25518482 AR 1 40 BOLT WUI X 3 50 79 X 23 5 25525861 AR 1 20 BOLT 7 I6 M X 59 80 A R H 231A 10015568 2 155 BOL HFI II I1 X 1 5X 100 PL 80 81 X 2 8 476543 8 1 30 BOLT CYL HD LG 056 4 EELS X 2 8 476572 S IO BOLT CYL HD SHORT 3 A B 23IA HST DES 255 I8482 AR 1 40 BOLT 7 IIM4 X 3 50 NOTE 1 I Si A B 23IA 1ST DES I 25525861 AR 2O BOLT 7 avid X 2 69 NOTE 1 8 3 A B 23IA 2ND DES 25525953 AR 1 40 BOLT CYL HD TO CYL BLK INR ROVV CTR LOC NOTE 2 8 A E3 231 6 2 ND DES I I I 25525954 AR I IO BOLT CYL HD TO CYL BLK INR ROW CTR ENE UTR ROW CTR NOTE 2 7878 ALL I 585927 AR 36 PIN DWL Ie X I6 STL 80 8 I X 2 8 I I 14024244 4 57 PIN CYL HD DVI L 75 ALL 250 I 37884 i8 3 A9 PLUG WAT JKT 24 IVIIVI I I 7 81 ALL 231 AI 25513252 4 79 PLUG CORE 28 6 IVIIVI 0 296 VALVE Intake ALL 23 E I I I254161 5 12 00 VALVE STD VVETH 4 I2 LK GROOVE 75 ALL 250 I 3995685 E5 11 60 VALVE OI55 0 5 Y6 ALL 250 I II 14025570 6 I2 VALVE STD I 75 ALL 250 14033018 6 11 70 VALVE OO35 0 8 76 ALL 250 14033020 6 T2 IO VALVE O305 0 5 77 78 ALL 23 E II 1254161 6 12 00 VALVE STD WITH 125 LK GROOVE 3 8I ALL 23I 4 I I I I 25512098 6 I IIGO VALVE STD 79 F3 I ALL 231 41 1 25512274 6 12 00 VALVE O OSI I EH X 2 8 I I 476529 6 14 15 VALVE STD 8 8 i X 2 8 I I 14024250 6 14 I5 VALVE 089 I II I OS I I BG SI X 2 8 14024251 G 14 15 VALVE 394 IVIIVI 0 5 SCI 3 I X 2 8 I I 14024252 6 I415 VALVE I775 IVIM 0 5 I BI X 2 8 I 14024249 6 13 65 VALVE STD 0 297 VALVE Engine Exhaust 76 78 ALL 23I 1254158 6 14 45 VALVE STD WITH 125 LK GROOVE 75 78 ALL 231 1262594 6 14 55 VALVE 010 0 5 W 125 VLV STEIVI LK GROOVE REPLACES VLV W 412 LK GROOVE 76 ALL 250 I 3995602 6 14 00 VALVE I OO35 OIS I I I 76o ALL 250 14095460 6 14 55 VALVE OI E5 0 3 76 ALL 250 I 14033160 6 15 95 VALVE O305 OS 76 ALL 250 14095451 6 NIL VALVE STD I YB 81 ALL 23I 4 I 1261380 G 14135 VALVE STD 798 9 ALL 231 4 1 1262674 E 14 55 VALVE OIO GIS I I Su X 2 8 476528 14 55 VALVE STD I EGE 2 8 I I 14024255 G I4 20 VALVE 089 IVIIVI OSI I RGB X 2 8 I 14024256 ii I475 VALVE 394 I IM 0 5 I Ri X 2 8 I 14024257 6 14 75 VALVE 775 IVIIVI 0 53 I I I2 8 I I 14024254 14 75 VALVE STI I I I 303 DAMPER SHIM SPRI 5 Engines Vaiweta B ALL 231 4 1 I I 1249422 6 OO DAIVIPER VLV SPR I B I 14003968 I2 55 SHINE VLV SPR I I I 5 Z 8 ALL 233 I I 1249 267 I2 2 70 SPRING VLV I YS ALL 250 3735381 I2 315 SPRING rDIV P I I I I I 8G ALL Q3 I T24 9267 G 270 IEPRING EXH VLV I I I I 9 BO ALL 23 I3 I 25500796 6 2 FO SPRING INT VLV 4 ESO i 2 RE I v 477292 I2 2 25 SPRING VVMDIVIF VLV 81 AI LI 231 1 1 I I 1249267 I2 2 70 SPRING INT EXH VLV I EVE SQ A18 I II I 14930029 I2 355 SPRING W QI IP VLV I I I I II I ILLBGE SEAL SEAL KIT SHlELI I Engine Valve NOTE I Lt Green Band used vv heads w I6O dia NOTE 2 Orange Bernd usr d vv he dw v Ir 51E ui 6 1987 GENERAL MOTORS SERVICE PARTS OPERATl N5 rOLDSI A BILE 3I Y 0 293 0 308 0 ws REV 7 87