A I I I 4 CYLINDER ENGINE I 0 289 I I GASKET GASKET KIT Engine Cylinder Head IC n t 87 90 M1 2 5E 10 159448 1 60 5O GASKET KIT VALVE GRIND 0 293 BOLT PlN PLUG STUD Engine Cylinder Head I I 85 90 M1 2 5E I 10044566 8 1 35 BOLT CYL HD POS 1 THRU 8 M11X1 5X100 PL PGO 7 37 85 90 M1 2 5E 522780 2 40 PIN CYL HD DWL 5 16X11 16 PGO 4 102 85 90 M1 2 5E 10006951 1 68 PLUG CYL HD RR 47 87 MM PGO 7 33 85 90 M1 2 5E 10044568 1 1 50 STUD CYL HD POS 9 PGO 7 35 85 89 M1 2 5E 12338010 1 1 50 STUD CYL HD POS 10 I 0 296 VALVE Intake I I 85 86 M1 2 5E 10022882 4 19 70 VALVE STD 85 86 M1 2 5E 10022883 4 19 70 VALVE 08 MM 0 S 4 85 86 M1 2 5E Y 10022884 4 19 70 VALVE lNT 13 MM O S I 87 88 M1 2 5 E 10040226 4 19 70 VALVE INT STD PGO 15 32 87 88 M1 2 5E I 10040227 4 18 90 VALVE INT 08 MM 0 S PGO 15 32 I 87 88 M1 2 5E I 10040237 4 19 70 VALVE INT 13MM O S PGO 15 32 89 90 M1 2 5 E 10 044512 4 19 70 VALVE INT STD PGO 15 32 89 90 M1 2 5E 10044513 4 19 70 VALVE INT 08 MM O S PGO 15 32 I 89 90 M1 2 5E 10121099 4 19 70 VALVE lNT 0 13 MM 0 S PGO 15 32 0 297 I VALVE Exhaust 8 SI 85 B6 M1 2 5 E 10034162 4 I 20 00 VALVE EXH STD 85 86 M1 2 5E J 10034163 4 20 00 VALVE EXH O8MM O S 1 85 86 M1 2 5E 10037016 4 19 50 VALVE EXH 13MM O S L I 87 88 M1 2 5E 10044612 4 19 30 VALVE EXH STD PGO 15 31 E 87 88 M1 2 5E 10044613 4 19 30 VALVE EXH O8MM 0 S PGO 15 31 I 87 88 M1 2 5E 10104418 4 19 30 VALVE EXH 13 MM O S PGO 15 31 89 90 M1 2 5E 10044515 4 19 30 VALVE EXH STD PGO 15 31 89 90 M1 2 5E 10044516 4 19 30 VALVE EXH 08 MM O S PGO 15 31 89 90 M1 2 5E 10121100 4 19 30 VALVE EXH 0 13 0 S PGO 15 31 0 303 I SPRING Engine Valve 85 M1 2 5E 3735381 4 3 75 SPRING W DAMPER INT VLV PGO 7 45 I 86 M1 2 5E 10034268 4 3 15 SPRING W DAMPER VLV 87 88 M1 2 5E I 10040232 8 3 15 SPRING W DAMPER VLV PGO 15 12 89 90 M1 2 5E I 10124698 8 4 85 SPRING VLV PGO 7 45 0 308 SEAL SHlELD Engine Valve 85 86 M1 2 5E 460483 4 N L SEAL W RET INL VLV STEM STD 003 O S PGO 7 46 85 86 M1 2 5 E 3835333 8 N L SEAL VLV STEM OIL PGO 7 39 85 86 M1 2 5E 14037715 4 15 25 SEAL W RET INLET VLV STEM OIL 015I 0 S 85 86 M1 2 5E 14037716 4 15 25 SEAL W RET INLET VLV STEM OIL 030 I 0 S 87 90 M1 2 5E 10042877 4 1 90 SEAL EXH VLV STEM OIL PGO 15 10 89 9 0 M1 2 5E LN8 10042875 4 1 90 SEAL INT VLV STEM OIL PGO 15 10 85 M1 2 5E Q 10007818 16 73 SHIELD VALVE STEM OIL PGO 7 44 0 309 CAP Engine Valve Spring I 85 86 M1 2 5E I 10038209 8 1 05 CAP INT VLV SPRING PGO 7 38 6 87 90 M1 2 5E 10040230 8 1 15 CAP VLV SPR PGO 15 11 I 0 310 I KEY Engine Valve Spring cap 85 86 M1 2 5E 3947770 16 48 KEY VLV STEM PGO 7 40 I 87 90 M1 2 5 E I 360505 16 28 KEY VLV STEM PGO 15 9 0 333 ARM Engine Valve Rocker Arm 85 88 M1 2 5E 10014819 8 9 00 ARM W BALL VLV RKR 89 90 M1 2 5E 1 0121095 8 9 00 ARM W BALL VLV RKR PGO 7 43 W 0 386 COVER Engine Camshaft Valve I 85 88 M1 2 5E 10044306 1 31 25 COVER W BAFFLE VLV RKR ARM I SLOTTED OIL CAP PGO 8 89 89 90 M1 2 5E 10101423 1 31 25 COVER W BAFFLE VLV RKRARM I THREADED OIL CAP PGO 15 6 0 423 GASKET Engine Camshaft Cover I I I I 85 90 M1 2 5E A 10101791 1 N L GASKET VLV RKR ARM CVR 0 426 ROD Engine ValveIPush V I I 85 86 M1 2 5E I E I 10028055 8 3 90 I ROD VLV LIFTER PUSH PGO 8 70 87 90 M1 2 5E 10040235 8 3 10 ROD VLV LIFTER PUSH PGO 16 66 1991 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52M 0 289 0 426 I 0 6 1 91I C