59 Ser 6 6 cyl 60 62 Ser 60 6 cyl exc Tilt 3764749 1 3 10 59 All 8 cyl exc L D 10F D D A 60 63 Ser 60 283 327 3764747 1 3 10 cast iron Note 1 NOTE 1 When using this outlet on 1959 1st design models use 3152312 Thermostat 60 63 All 348 409 lst design 3788947 1 3 30 cast 3788947 Note 2 NOTE 2 Use pipe reducer bushing 144042 8 963 when original by pass is desired 63 64 Ser 50 60 292 exc Tilt 3789538 1 3 50 63 64 Ser 60 Tilt 292 3829075 1 63 65 All 348 409 2nd design 3833262 1 2 85 double by pass system case 3833262 65 70 Ser 40 thru 60 Tilt 6 cyl 3864482 1 4 30 66 70 All 366 427 3860303 1 3 65 67 Ser 40 283 exc Tilt 68 Ser 40 thru 60 307 327 exc Tilt 69 70 All 350 3877660 1 2 0 70 All 6 cyl exc Tilt 3789162 1 1 90 65 66 Ser 50 60 3 53 4 53 exc Tilt 67 69 All 4 53 exc Tilt 5116081 1 8 40 ELBOW water outlet 65 66 Ser 60 Tilt 4 53 67 68 Tilt 3 53 4 53 5135633 1 29 69 ELBOW water outlet 65 Tilt D DH478 66 68 Tilt D351 D DH478 2461878 1 9 05 FITTING water outlet 62 64 Diesel exc LCF 65 66 Tilt 6V 53 5116409A R 1 158 FLANGE cast 5116409 65 69 All D351 D DH478 538440 1 1 125 FLANGE water outlet 65 66 All D351 D DH478 67 69 All D DH478 2449920 2 1 50 SLEEVE water outlet 1 154 GASKET Coolant Outlet 38 55 Util 55 57 Ser 4 5 6 7 8 w P T 58 59 All exc P T 10F 261 60 62 Ser 40 50 63 66 Ser 50 230 283 65 70 All 6 cyl 65 66 Ser 60 80 348 409 67 69 Ser 40 thru 60 8 cyl water outlet 58 59 All w P T exc 10F 59 Ser 6 w L D 283 60 66 Ser 60 thru 80 8 cyl 67 69 Ser 40 thru 60 8 cyl 3701777 A R 10 by pass thermostat housing 4Vu long 1 dia large hole 56 57 Ser 5 6 7 8 exc P T 58 59 All w P T exc 10F L D 261 59 62 All 261 60 63 Ser 60 thru 80 8 cyl 3765024 1 10 2 V dia large hole 55 59 All 322 1192735 2 25 2 V z D x 2 V z 0 D 62 66 Ser 50 60 3 53 4 53 67 69 All 3 53 4 53 5116092 1 16 elbow 62 65 LCF Diesel water outlet elbow 62 64 Tilt Diesel 65 66 Ser 80 6V 53 5122437 2 15 water outlet flange 63 66 Ser 50 60 230 250 292 3789539 1 10 65 66 All D351 D DH478 67 69 All D DH478 exc Tilt 516111 1 10 water outlet flange 65 Tilt D DH478 66 68 Tilt D351 D DH478 2461883 1 25 water outlet flange 66 70 All 366 427 3860304 1 15 water outlet 1 159 HOSE CONNECTOR ELBOW TEE TUBE Radiator Inlet NOTE Inlet hose is used between top of radiator and engine coolant outlet Outlet hoses group 1 173 are used between bottom of radiator and cylinder block NOTE Some hoses have been replaced with hoses of aa different length or configuration This replacement hose in many instances will require cutting using old part as guide 47 55 Util 3702348 1 1 40 1V l D moulded 3702348 55 57 Ser 4 6 8 cyl exc P T 3723714 1 1 85 Wa l D moulded 3723714 55 58 Ser 4 6 6 cyl exc P T 3713897 1 1 80 1V2 l D moulded 3713897 56 57 Ser 10 exc P T 58 59 Ser 10F exc P T 3726346 1 1 80 1 l D moulded 3726346 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31S REV 6 71 1 31 1 153 1 159