6 CYLINDER ENGINE 0 413 BOLT GROMMET NUT REINFORCEMENT SCREW STUD WASHER Engine Valve Rocker Arm Cover Con t 87 88 A 3 8 3 25518660 6 1 92 GROMMET VLV RKR ARM CVR STUD PGO 67 16 86 A 3 88 3 25519219 6 3 34 NUT VLV RKR ARM CVR 5 16 18X 95 PGO 67 15 87 88 A 3 8 3 25519219 6 3 34 NUT VLV RKR ARM CVR 5 16 18X 95 PGO 67 15 86 A 2 8X 14090538 AR 1 04 REINFORCEMENT VLV RKR CVR PGO 34 75 82 85 A 3 0E 1251242 AR 1 92 SCREW W PLATE VLV RKR CVR W 1 UNTHREADED STUD PGO 45 67 82 85 A 3 0E 1381008 AR 1 12 SCREW W PLATE VLV RKR CVR HEX HD LESS UNTHREADED STUD PGO 45 20 84 85 A 2 8X 14077864 3 80 STUD VLV RKR CVR SPL M6X1 THREAD 02 251 PGO 33 12 86 A 2 8X 14091881 AR 2 48 STUD VLV RKR CVR M6X1X9 M6X1X10 5 35 NECK TO TORX DR PGO 34 76 86 A 2 8X 14092906 AR 87 STUD VLV RKR CVR M6X1X13 M6X1X21 5 TL 40 5 TORX DR DOG PT PGO 34 77 86 A 3 88 3 25519277 6 88 WASHER VLV RKR ARM cvn NUT PGO 67 14 87 88 A 3 8 3 25519277 6 88 WASHER VLV RKR ARM CVR NUT PGO 67 14 O I l lII I E X P O R T Dllltbfbdrfllfllill E X P O R T O IlI ll IO O l E X P O R T lI l lI OII 82 83 A 2 8X EXPORT CANADA 14077864 3 80 STUD VLV RKR CVR SPL M6X1 THREAD 02 251 PGO 33 12 0 423 GASKET Engine Valve Rocker Arm Cover 84 85 A 2 8X 14089252 2 N L GASKET RKR CVR PGO 34 80 82 85 A 3 0E 25523348 2 N L GASKET VLV RKR ARM CVR PGO 45 17 84 85 A 231 3 25523348 2 N L GASKET VLV RKR ARM CVR PGO 45 17 86 A 3 8B 3 25518526 2 9 25 GASKET VLV RKR ARM CVR PGO 67 19 87 89 A 2 8W 14092297 2 N L GASKET VLV RKR ARM CVR PGO 39 9 87 88 A 3 8 3 25518526 2 9 25 GASKET VLV RKR ARM CVR PGO 67 19 89 91 A 3 3N LG7 25532619 2 8 66 GASKET VLV RKR ARM CVR 86 A 2 8X 10048606 2 N L GASKET VLV RKR CVR PGO 34 80 W llblttlllhbilbli P O H T lIl l llO P O R T l lIl fll I l P O R T O l ll l Ol 82 83 A 2 8X EXPORT CANADA 14089252 2 N L GASKET RKR CVR PGO 34 80 0 426 ROD Engine Valve Push 82 85 A 4 3T 2251 1044 12 6 17 ROD EXH PUSH PGO 74 91 87 89 A 2 8W 14102521 6 5 67 ROD EXH VLV PUSH PGO 39 23 87 89 A 2 8W 14102522 6 5 67 ROD INT VLV PUSH 82 85 A 3 0E 25510025 12 8 03 ROD PUSH PGO 45 38 84 86 A 2 8X 476525 12 9 41 ROD PUSH PGO 33 25 84 A 231 3 1ST DESIGN 1249139 12 7 55 ROD PUSH CM SHF FLG HAS 2 CAST D MPLES MARKED W GRREN PAINT PGO 61 48 84 A 231 3 2ND DESIGN 25510025 12 8 03 ROD PUSH CM SHF FLG HAS NO CAST DIMPLES MARKED W YELLOW PAINT PGO 45 38 85 A 231 3 25510025 12 8 03 ROD PUSH PGO 45 38 86 A 3 8B 25524317 12 6 82 ROD VLV PUSH 86 88 A 3 8 3 25532162 12 5 35 ROD VLV PUSH PGO 68 69 89 91 A 3 3N LG7 25532737 12 4 90 ROD VLV PUSH PGO 51 35 I O I Il P O R T hIO Il l lI l P O R T O I lI fll P O H T Illibllllllllfll 82 83 A 2 8X EXPORT CANADA 476525 12 9 41 ROD PUSH PGO 33 25 0 429 BOLT NUT PIVOT STUD Engine Valve Adjusting NOTE 1 WHEN RE CONDITIONING A VLV SEAT ON ALUMINUM CYL HEADS IT WILL BE NECESSARY TO REMOVE NON ADJUSTABLE RKR ARM BALL STUD NUT AND REPL WITH ADJUSTABLE STUD NUT TURNDOWN VLV RKR ARM NUT UNTIL THERE IS NO FREE AXIAL MOVEMENT OF PUSHROD THEN TURN ADJ NUT 1 2 TURN MORE NOTE CONTINUES AT 1A NOTE 1A AT NO TIME SHOULD THERE BE LESS THAN 4MM OF VLV SEAT MATERIAL REMAINING AFTER RE CONDIT ONING 89 91 A 3 3N LG7 25533440 AR 96 BOLT VLV RKR ARM PIV HFH W SHLD 3 8 16X 64 THD 56 ODX1 14 SHLD 30OM PL PGO 51 27 84 86 A 2 8X 477212 12 1 49 NUT VLV RKR ARM PGO 33 19 87 89 A 2 8W 477212 12 1 49 NUT VLV RKR ARM ADJUSTABLE REFER TO NOTE 1 IN CATALOG TEXT PGO 33 19 1993 GENERAL MOTORS SERVICE PARTS OPERATIONS BUICK 44A 0 413 0 429 0 26 4 93