r E 153 ENGINE ASSEMBLY A A 0 303 SPRING valve Cen t l A V I 83 85 Ser 10 D D 6 10 153 2nd A design 1 3735381 A R inlet and exhaust w damper 2 yellow r stripes plus maroon aluminum dk green A I A A black blue and white or tan stripe 0 308 SEAL SHIELD Valve Spring Cap A 63 85 All 153 Q 3835333 A Fl FO ring inlet and exhaust 83 85 All 153 3 838755 A R SHIELD cup shape l D x 1 0 0 0 309 4 CAP Valve Spring 4 V NOTE 1 Used with necked dewnistems Full dia stem on some models require cap 3776967 83 85 All 153 A 3729383 A R inlet and exhaust lA 0 D stamped H y Note 1 0 310 AKEY Valve Stem A r A 83 85 All 153 J A 838029 A R U shape 0 333 ARM Valve Rocker with Adjusting Screw and Nut 83 85 All 153 5723551 A R inlet and exhaust 0 388 COVER ASSY GROMMET Valve Rocker Arm i A 83 85 Ser 10 D D G 10 153 2770090 1 84 85 All 153 3894337 1 GRDMMET cover to a cl l D x A 17 sg J 0 413 4 BOLT REINFORCEMENT Valve Rocker Cover and Support Also see Group 0 368 1 NOTE 1 Use with Bolt 180016 83 85 All 153 L 180018 A1 20 x J 8 900 r 83 85 All 153 3877870 A R RElNFORCEMENT 1 O L Note 1 0 423 A GASKET Valve Rocker Cover A y A A 83 85 All 153 23923468 1 A 6 holes 17 l 0 L x 4 ol wide 0 426 ROD Valve Push l A I A A 83 85 All 153 3788495 A R 9 0 L A 0 429 BALL NUT STUD Valve Push Rod Adjusting I 83 85 All 153 3992294 A R 4 A I dia valve rocker arm 83 85 All 153 3744341 16 NUT valve rocker arm 24 across the flats x 2 thk 83 85 All 153 3814892 16 STUD valve rocker arm ball 003 O S 24 x 2 a 2 grooves on shank I light blue paint A 83 85 All 153 3815892 18 A STUD valve rocker arm ball 013 0 5 4 24 x 2 1 groove on shank light A blue paint 0 439 COVER Valve Push Rod A A 83 854 All 153 3788548 1 4 holes y 8 A 0 443 GASKET Valve Push Rod Cover A A 83 85 All 153 3923489 1 17 u O L 0 448 BOLT Valve Push Rod Cover 9 A r 63 65 AllA 153 K 3814350 A R w Iockwasher and seal 18 x 0 459 TAPPET Valve er Lifter A 63 85 All 153 5232450 A R hydraulic type 0 5 19 CAMSHAFT A A NOTE 1 Used only with Valve Spring and Damper Assy 3735381 4 NOTE Engine Camshaft Break in Oil Group 1 850 should be used when installing new camshafts 83 85 All 153 A 2770015 1 Note 1 V 0 533 BEARING UNIT Camshaft Thrust l i y A 83 85 All 153 3790531 1 w spacing ring 1 0 0 x 1 u I D 0 539 BEARING Camshaft All Locations 1 thru 5 E 83 85 All 153 3750884 A R front No 1 center No 2 f 83 85 All 153 y 3750882 A R rear No 3 8 0 543 BEARING Camshaft Front Intermediate See Group 0 539 for Model A Application A IGM PARTSDIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TL A REV 5 79 A A oa A 0 303 0 543