1 069 PUMP A15SEMBLY PUMP UNIT Engine Coolant 38 ALL use offset fan cast 598309 pulley stamped 838764 598308 1 11 70 53 55 CORVETTE 6 cyl 3706009 1 27 35 54 55 COMM w H T with cooler lst Ser pulley V wide 3836223 1 12 00 62 ALL 261 3757231 1 63 Ser 10 thru 30 292 3789536 1 12 15 41 52 ALL PUMP UNIT pulley V wide pulley 53 55 UTIL lst Ser exc 261 stamped 838905 37742101 1 12 20 53 54 PASS 53 55 COMM lst Ser exc H T PUMP UNIT pulley V Gg wide 37742111 1 12 20 54 55 ALL 1261 lst Ser PUMP UNIT 3836208 cast on body 3774212t 1 12 20 58 63 PASS 348 409 PUMP UNIT 3774213l 1 17 60 55 62 ALL 6 cyl 2nd Ser PUMP UNIT less pulley 3774186l B1 11 15 55 63 ALL CORVETTE 8 cyl 2nd Ser exc 348 409 PUMP UNIT less pulley 3787566l 691 14 20 63 ALL 230 63 Ser 10 D D 4 cyl PUMP UNIT 3815726 1 TNOTE Includes pump to block gasket NOTE When using on 1962 63 Models it is necessary to drive the pulley hub back l inches on bearing shaft The pump plate should be removed and the bearing shaft must be supported before starting the pressing operation GBNOTE On 55 56 models 3138803 reducing bushing must be used 1 0il 3 IBODY BOLT STUD Coolant Pump 53 55 CORVETTE 6 cyl 3706013 1 11 85 53 55 CORVETTE 6 cyl BOLT R H 16 x 1 132405 1 8 907 56 57 D D 8 cyl BOLT 16 x 1 3836646 1 3 275 58 63 PASS 348 409 62 PASS w P S 8 cyl BOLT attach hex 16 x 1 3735703 A R 10 62 PASS 8 cyl BOLT Lg 20 x ext lockwasher 839301 6 1 428 57 63 PASS 8 cyl exc C A C Cool Pack 346 409 60 61 Ser 10 thru 30 283 exc Cool Pack U STUD upper R l 1 pump attaching battery 62 63 Ser 10 thru 30 283 ground cable attach Q 24 x 16 x 23 Q 3759755 1 15 58 63 PASS 348 409 STUD pump attaching battery ground cable attach 24 16 x 2 3745278 1 15 58 62 CORVETTE STUD pump attaching engine frt mtg brkt attach 16 botl1 ends x 31 3750563 1 50 1 0 Zl9 GASKE l Coolant Pump Assembly to Block 38 40 ALL bas one 1 center hola 838137 1 08 41 54 ALL has two 1 center holes one half 55 COMM UTIL lst Ser flat hole 3836048 1 08 55 62 ALL 6 cyl 2nd Ser 31 1 10 w 5 holes 1 dia 3836162 1 08 55 63 ALL 8 cyl exc 348 409 left or right UQ large 1 D cork 3754587 2 08 55 63 CORVETTE 8 cyl left or right 1 large 1 D neoprene 3756522 2 10 58 63 PASS 348 409 has two 2 center holes 3763955 2 10 63 ALL 230 3788478 1 63 Ser 1 0 thru 30 292 3815848 1 08 NOTE When using as L H gasket trim off dia hole l 0 B7 CONNECTOR HOSE PLUG ELBOVV Coolant Pump By Pass 58 PASS 348 exc 3 2BC H L Cam hose to inlet manifold and water pump 58 PASS 348 exc H L Cam 59 61 PASS 348 exc H L Cam 3 2BC thermostat by pass hose to inlet manifold 58 61 PASS 348 r thermostat by pass hose to water pump 61 63 PASS 409 r and inlet manifold tube 1 O D x 1 long 3735575 2 15 TNOTE May be necessary to cut as required gmdgggt Motor Division Q73 General Motors Corporation