4 CYLINDER ENGINE I e I 0 206 B l T C VER HOUSlNG PIN SCREW STUD Engine Cover Front on t I G 83 84 ST1 2 0Y 14069895 1 91 50 COVER W POINTER CR CASE FRT END PGO 4 72 V 84 85 S1 2 25 94029804 1 44 00 COVER A PULLEY HSG PGO 53 16 JI 84 85 S1 2 25 94029805 1 44 00 COVER B PULLEY HSG PGO 53 17 85 90 ST1 2 5E 10044603 1 10 35 COVER TIMING GEAR PGO 12 73 84 85 51 2 25 94243516 1 282 00 HOUSING TIMING PULLEY PGO 53 7 84 85 S1 2 25 94020219 1 48 PIN STRAIGHT TENSION CTR OO 862 84 ST1 2 0Y 14003948 2 53 SCREW TIMING POINTER M6 X 1 X 10 9 8PC PGO 70 71 85 ST1 2 5E 14101259 2 2 12 STUD TIMING ND 10X1 5X20 00 004 0 207 GA5KET SEAL Engine Front Cover 82 85 ST1 1 9A 94254018 LH 2 25 GASKET ENG FRT CVR PGO 51 14 82 85 ST1 1 9A 94254759 RH 2 25 GASKET ENG FRT CVR PGO 51 13 84 85 51 2 25 94029803 1 6 45 GASKET HSG T0 CYL BLK PGO 53 12 85 90 ST1 2 5E 3923472 1 1 30 GASKET ENG FRT CVR PGO 12 74 85 90 ST1 2 5E 10036286 1 6 70 5EAL CR SHF FRT OIL TIMING GR CVR A 00 213 0 213 COVER SEAL Engine Crankshaft Front 84 85 51 2 25 94029823 1 5 65 COVER OIL SEAL FRT DUST PGO 53 22 82 85 ST1 1 9A 94020262 1 15 25 SEAL CR SHF FRT OIL PGO 51 6 83 84 ST1 2 0Y 10036286 1 6 70 SEAL CR SHF FRT OIL PGO 12 72 84 85 51 2 25 94030585 1 15 55 SEAL CR SHF FRT OIL PGO 53 10 A 0 219 HOLDER INDICATOR MARKER POINTER Engine Front Cover 84 85 51 2 25 94116847 1 4 65 HOLDER TIMING HSG PROBE PGO 53 32 85 86 ST1 2 5E 10031983 1 9 00 INDICATOR W BRKT TIMING PGO 1 1 58 87 90 ST1 2 5E 10043045 1 2 45 INDICATOR TIMING PGO 20 57 82 85 ST1 1 9A 94238339 1 7 75 MARKER TIMING PGO 51 2 84 85 51 2 25 94029806 1 4 30 POINTER TIMING PGO 53 1 1 0 253 CUP INSERT PLUG Engine Cylinder Head 82 85 ST1 1 9A 94024180 1 1 00 CUP CYL HD UPR PGO 31 6 82 85 ST1 1 9A 94024182 1 1 95 CUP CYL HD SEAL RR PGO 31 5 84 85 51 2 25 I 94026342 AR 1 1 25 CUP CYL HD SEAL UPR 18MM DIA PGO 29 1 1 J 84 86 51 2 25 94029576 AR 5 55 CUP SEAL CYL HD RR 45MM DIA PGO 29 10 J 84 85 S1 2 25 V 94029583 AR 1 25 CUP CYL HD SEAL 12 3MM DIA PGO 29 9 84 85 51 2 25 V 1 94029588 4 2 15 CUP CYL HD SEAL LWR 1 6MM DIA PGO 33 3 82 85 ST1 1 9A 94213384 4 15 00 INSERT EXH VLV SEAT 82 85 ST1 1 9A 94216969 4 18 85 INSERT INT VLV ST PGO 31 3 84 85 S1 2 25 94029345 4 15 00 INSERT EXH VLV ST PGO 33 9 84 85 51 2 25 94029346 4 15 00 INSERT INT VLV ST PGO 33 8 84 85 51 2 25 94026504 4 1 25 PLUG CYL HD PLT PGO 33 6 0 269 HEAD PRECHAMBER Engine Cylinder g 82 85 ST1 1 9A 94154948 1 619 00 HEAD CYL PGO 31 1 83 84 ST1 2 0Y 14081798 1 325 00 HEAD CYL PGO 8 85 84 85 S1 2 25 94126993 1 770 00 HEAD CYL PGO 33 1 85 86 ST1 2 5E Q 10037283 1 372 00 HEAD CYL PGO 15 34 87 88 ST1 2 5E 10117770 1 372 00 HEAD CYL PARTIAL PGO 23 46 89 90 S1 03 53 2 5E 10132745 1 372 00 HEAD CYL PGO 23 46 84 85 S1 2 25 94126994 4 64 25 PRECHAMBER PLUG HOT GLOW PLUG PGO 33 10 0 283 GUIDE SEAL Engine Cylinder Head 82 85 ST1 1 9A 94206762 4 5 25 GUIDE INT VLV PGO 31 7 82 85 ST1 1 9A 94206763 4 5 25 GUIDE EXH VLV PGO 31 8 84 85 S1 2 25 94029347 8 5 25 GUIDE VLV INT EXH PGO 33 7 84 85 51 2 25 94029353 8 I 4 00 SEAL VLV GUIDE OIL PGO 33 14 0 289 GASKET GA5KET KIT Engine Cylinder Head I 82 85 ST1 1 9A 94213809 1 30 00 GASKET CYL HD PGO 31 22 83 84 ST1 2 0Y 14054446 1 16 90 GASKET CYL HD PGO 7 59 84 85 51 2 25 94030188 1 26 25 GASKET CYL HD PGO 33 16 85 88 ST1 2 5E 10101784 1 18 70 GASKET CYL HD PGO 15 28 90 51 03 53 2 5E LN8 10101784 1 18 70 GASKET CYL HD PGO 15 28 J 85 86 ST1 2 5E 10104427 1 N L GASKET KIT VLV GRIND 87 89 ST1 2 5E 10159448 1 60 50 GASKET KIT VALVEGRIND 90 S1 03 53 2 5E 10159448 1 60 50 GASKET K T VALVE GRIND 1990 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52S 0 206 0 289 0 8 REV 10 90