V 1946 70 ENGINE ASSEMBLIES A 0 724 CHAIN Camshaft Timing Con t I 60 66 Ser 60 283 327 67 68 All 327 y 69 70 Ser 50 350 3735411 1 late roller type Note 1 58 65 All 348 409 3740686 1 roller type if 67 68 All 283 307 69 70 Ser 40 350 332053 1 early link type 3 69 70 All 366 427 3891519 1 0 728 GEAR SPROCKET Crankshaft Timing Steel y NOTE 1 On the 292 cu in engine prior to 1966 it will be necessary to discard camshaft gear 3866727 and replace with 3882893 Also replace the crankshaft front end cover with 3998160 NOTE 2 May be used with 3735412 sprocket and 373541 1 chain on early link type jobs 40 66 All 6 cyl exc 292 3836605 1 27 teeth 3 0 D stamped 71 62 69 All 3 53 4 53 6V 53 4 5116195 1 7 O D x 4 l D 63 70 All 250 292 3882892 1 27 teeth Note 1 65 69 All D351 D DH478 2454002 1 34 teeth 66 67 All 366 68 All 427 3860086 I 1 31 teeth 55 57 All 8 cyl exc 322 58 59 Ser 4 8 cyl 58 59 Ser 6 w L D 283 60 66 Ser 40 50 283 3759980 1 SPROCKET 18 teeth k 57 59 Ser 5 6 7 8 283 exc L D 60 66 Ser 60 283 327 I 67 68 All 327 69 70 Ser 50 350 3735413 1 SPROCKET 22 teeth Note 2 67 68 All 283 307 69 70 Ser 40 350 3896959 1 SPROCKET 18 teeth 69 70 All 366 427 3891518 1 s SPROCKET 25 teeth 0 729 KEY Crankshaft Sprocket 56 59 All 322 1321045 1 1 long I 65 69 All D351 D DH478 2380310 1 l 2 long 0 736 SPROCKET BEARING BUSHING GEAR HUB SHAFT Camshaft lmlng NOTE 1 May be used with 3735413 sprocket and 373541 1 chain on early link type jobs NOTE 2 On the 292 cu in engine prior to 1966 it will be necessary to discard crankshaft gear 383537 1 and replace with 3882892 Also replace the crankshaft front end cover with 3879688 55 57 All 8 cyl exc 322 i 58 59 Ser 4 8 cyl 58 59 Ser 6 w L D 283 60 66 Ser 40 50 283 3865964 1 36 teeth 57 59 Ser 5 6 7 8 283 exc L D 60 66 Ser 60 283 327 67 68 All 327 69 70 Ser 50 350 3735412 1 44 teeth cast 3735412 Note 1 67 68 All 283 307 69 70 Ser 40 350 340235 1 36 teeth 69 70 All 366 427 3891517 1 50 teeth 62 69 All 3 53 4 53 6V 53 5196793 1 BEARING idler 65 69 All D351 D DH478 2377668 1 BUSHING cam idler gear 65 69 AII D351 D DH478 2454012 1 BUSHING bal shaft idler gear 38 47 All 48 52 All exc 2 Ton 3836156 1 GEAR fibre 54 teeth stamped 3836156 40 55 Util 55 62 All 6 cyl 3835473 1 GEAR aluminum cast 3835473 62 70 All 3 53 4 53 6V 53 5133387 1 GEAR camshaft R H Helix 63 65 All 230 3866727 1 GEAR Ident No 3866727 83 70 All 250 292 3882893 1 GEAR cast 3866727 54 teeth Note 2 65 69 All D351 D DH478 2454018 1 GEAR camshaft timing 65 69 All D351 D DH478 2454014 1 GEAR camshaft idler 65 68 All D351 D DH478 2454007 1 GEAR balancer shaft 65 69 All D351 D DH478 L 2454010 1 GEAR bal shaft idler 66 68 All 366 427 6272965 1 GEAR 6 2 teeth 67 89 All 3 53 4 53 5133388 1 GEAR camshaft L H Helix 67 69 All 3 53 4 53 5135227 1 GEAR ASSY idler timing L H Helix 62 69 All 3 53 4 53 6V 53 5124458 1 HUB idler I 65 69 All D351 D DH478 2454016 1 SHAFT cam idler gear 65 87 All D351 D DH478 I 68 69 All DH478 611951 1 SHAFT bal idler gear 0 738 BOLT NUT PIN PLATE RETAINER SPACER SLINGER WASHER Camshaft Sprocket 55 63 All 8 cyl exc 322 9408991 3 lock type 18 x 8 900 t GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM T 0 724 0 738 0 az REV 5 79