0 309 CAP H0 1 AT DH ASSY Valve Spring 38 47 ALL V V exh w U kewl octagon or round stmpd X 2136335I 6 15 38 47 ALL inlet w U key r0und double tlange or round slmpcl 1N 080 thick 8393671 6 10 47 52 ALL 53 62 PASS 6 cyl exc 1955 w G 53 56 Sei 3 6 cyl exc D D H D 57 59 Ser 3 6 cyl 60 62 Ser 10 thru 30 6 cyl inlet and enrhauslz 53 56 D D 6 cyl 53 55 UQ TON HD 235 lst Ser 53 55 2 TON 1stSer 55 PASS w P G 6 cyl inlet only 1 dia 080 thick 38353921 A R 12 55 PASS CORVETTE wlP G 6 cyl exhaust w dual valve springs 1 O D 3836134 6 12 55 62 PASS CORVETTE 283 327 55 59 Ser 3 8 cyl 60 62 Ser 10 thru 30 8 cyl 59 61 PASS w H Per 348 inlet and exhaust 1 1 M O D stamped 63 ALL CORVETTE exc 409 3729363 A R 15 58 60 PASS 348 exc H Per Sp Hrlter 61 PASS 348 exc H lZ er w reg cam Sp H Per inlet cimcl eszhaust 1 1 OD 3747309 A R 20 60 61 PASS w Sp H Per 348 61 PASS H Per w req can 348 63 PASS 409 inlet ancl exhaust 1 1 OD 3776967 A R 20 61 63 PASS 409 inlet and exhaust 11 O D 3815520 16 20 41 55 PASS 6 cyl exc PG 41 55 COMM llj TON 6 cyl exc D D 41 53 2 TON ROTATOR AJESSY X1 lC llS 1 valve 3695373t 6 1 85 54 56 D D 6 cyl 54 55 2 TON lst Ser 54 1 1 TON HD 235 ROTATOR AEElEEY exhaust valve stamped 55S 3739410 6 1 80 63 Ser 10 thru 30 292 ROTATOR ASSY exhaust valve stamped RCC 3817362 8 1 80 lNO l E For use w 45 valves only for preventing ezrcoxsnsive heat gcuueration on heavy duty truck or other operations where this condition may 1 0 encountered INOTE On 1941 47 models w two qr oove valve stems use 13835392 Cup NO l E Used with necked clown stems Full dia stem an sazme models require cap 3776967 0 310 KEY CAP Vcllve Stem 38 63 ALL CORVETTE exc 348 409 58 61 PASS w dual valve sprinqs 348 U shape 838029t A R 05 58 63 PASS 348 409 exc dual valve springs orange 3747310T 32 05 54 ALL 55 COMM UTIL lst Ser CAP valve imoisa silsncierl 3716742 12 15 tNOTE 348 Hi Performance Engines having dual valve spzriuqs require O ring seals and valve stem keys as follows Dual spring valve with NECKlEl1 DOWN or reduced diameter stem lip section use 3835333 seal and 833029 key Dual spring valve with lull diameter stern tip section use 3756314 seal and 3747311 Irey 0 311 SEAT Valve Sgprizmg 38 49 ALI exc DC 50 53 ALL 216 54 55 ALL 235 exc PG inlet and exh 1 height overall 838539 12 05 0 333 ARM Valve Rocker with Adjusting Scnwar and Nui 41 49 ALL 50 53 ALL 216 exhaust 1 cast 8 1E l94 61 839459 3 1 65 giiiffit Mm W U 309 U 333 General lMot0rs Corporation