0 308 COVER SEAL SHIELD Valve Spring Cap 41 47 ALL inlet height overall 839570 6 40 41 47 ALL exhaust height overall 839897 6 40 47 57 ALL CORV l SEAL inlet and exh 3835333 A R 05 55 56 ALL CORV 8 cyl exc dual 4BC 57 ALL CORV 8 cyl exc H L Cam SHIELD cup shape I D x 1 O D 3836755 16 10 NOTE 3835333 Seal also used on 1941 47 models w two groove valve stems 0 309 CAP ROTATOR ASSY Valve Spring 35 47 ALL exh w U key octagon or round stmpd X 2136335 1 6 11 35 47 ALL inl w U key r ound double flange or round stmpd l N 080 thick 839367 1 6 10 47 52 ALL 53 57 PASS 6 cyl exc 1955 w P G 53 56 COMM 1 TON 6 cyl exc D D hvy duty 57 Ser 3 4 inlet and exhaust 53 56 D D 6 cyl 53 55 l TON hvy duty 235 lst Ser 53 57 2 TON 6 cyl 55 PASS 6 cyl w P G inlet only 1 dia 080 thick 38353921 A R 12 55 PASS CORV 6 cyl w P G exhaust w dual valve springs 1 O D 3836134 6 15 55 57 PASS CORV 8 cyl 03 57 COMM 1 TON 8 cyl inlet and exhaust 55 57 il TON 8 cyl 56 1 TON 8 cyl hvy duty inlet 3729363 A R 15 41 53 ALL exc P G 54 55 PASS COMM 1 TON 6 cyl exc P G D D ROTATOR ASSY exh valve 383609EST 6 1 55 54 56 1D D 2 TON 6 cyl 54 56 1 TON hvy duty 235 ROTATOR ASSY exhaust valve stamped 55S 3836090 6 1 55 55 56 1 TON 8 cyl hvy duty ROTATOR ASSY exhaust valve 56 stamped 55 56 Z2 TON 8 cyl on top 3732416619 8 1 50 57 Ser 6 6 cyl ROTATOR ASSY exhaust valve stamped I RC 3739410 6 1 50 57 Ser 6 8 cyl ROTATOR ASSY exhaust valve stamped H1C L 3739412 8 1 50 TNOTE For use w 45 valves only for preventing excessive heat generation on heavy duty truck or other operations where this condition may be encountered GBNOTE 1955 and early 1956 jobs also require rocker arm 3837175 and spring and damper assy 3732814 See TSB 392 1956 INOTE On 1941 47 models w two groove valve stems use 3835392 Cap NOTE Used on 1934 35 jobs only w valves 609379 609380 w annul ar grooves 0 310 KEY CAP Valve Stem 34 57 ALL CORV U shape 838029 A R 05 54 ALL 55 COMM UTIL 1stS er CAP valve noise sileucer 3716742 12 15 NOTE Used on 1934 35 jobs only w valves 609379 609380 w annular grooves 0 311 SEAT Valve Spring 34 49 ALL exc DC 50 53 ALL w 216 inlet and exh 1934 35 exh only use 54 55 ALL w 235 exc P G w straight side guides Mheight overall 838539 12 05 0 333 ARM Valve Rocker with Adjusting Screw and Nut 34 40 ALL exc DC exhaust w bshg forge 839001 838999 6 1 15 37 40 ALL inlet L w bshg forge 838997 838993 3 1 15 37 40 ALL inlet R w bshg forge 838998 838994 3 1 15 41 49 ALL 50 53 ALL w 216 exhaust L cast 839461 839459 3 1 30 41 49 ALL 50 53 ALL w 216 exhaust R cast 839462 839460 3 1 30 139 0 308 0 333