1 069 PUMP UNIT Engine Coolant 71 All 6 cyl 3947042 1 16 75 71 All 307 350 71 All w 2BC 400 39aR198 1 19 95 71 All 400 w 4BC 454 3990991 1 31 50 1 073 STUD Coolant Pump 71 All 307 350 71 Allw 2BC 400 3932388 1 15 3 a 16x1 3 18 1 079 GASKET Coolant Pump Assembly to Block 71 All 6 cyl 3788478 1 10 71 All 307 350 71 All w 2BC 400 3754587 1 10 71 All 400 w 4BC 454 3880039 1 10 1 109 ROTOR Coolant Pump 71 All 6 cyl 3920917 1 2 30 1 123 SEAL ASSY Coolant Pump 71 All exc 400 w 4BC 454 3927156 1 1 10 1 148 GAUGE ASSY Coolant Temperature Dash Unit 71 Chevelle w inst panel gauges 8490087 1 9 78 thermo 71 Camaro w inst panel gauges 8489856 1 12 78 w back plate temp 71 Nova w Console gauges 8489896 1 7 67 thermo 1 150 SWITCH ASSY Coolant Temperature Engine Unit 71 All 6 cyl 8489903 1 5 07 yellow shrink band around tower Note 1 71 All 8 cyl exc gauges 6489800 1 3 56 2 terminals stamped AC 638 257M Note 1 NOTE 1 These switches are located on the left bank of the engine with no other switch required on the right bank 71 All 8 cyl exc gauges 1993369 1 3 39 stamped 369 Note 2 NOTE 2 This switch is located on the left bank of the engine and used only when 6489785 or 6490094 switches appear on the right bank of the engine 71 Camaro w C A C 400 8489785 1 4 48 2 terminals stamped AC 63B 232M Note 3 NOTE 3 This switch is located on the right bank of the engine and used with either 1993369 or 1513462 on the left bank 71 All 400 w 4BC 454 exc gauges 8490094 1 4 89 Note 4 NOTE 4 This switch is located on the right bank of the engine and used with 1993369 on the left bank 71 All w gauges 1513482 1 3 83 Note 5 NOTE 5 This unit is located on the left bank of the engine and used only when 6489785 appears on the right bank of the engine l 152 HEATER UNIT Engine Heater 71 All w Engine Heater exc 454 994161 1 8 25 71 All w Engine Heater 454 994182 1 8 25 71 All exc H D Rad 994188 1 10 00 rad coolant 1 z dia 71 All w H D Rad 994189 1 10 00 rad coolant 1 dia 1 153 OUTLET Coolant 71 All 6 cyl 3789182 1 1 90 71 All 8 cyl 3877880 1 2 10 1 154 GASKET Coolant Outlet 71 All 3701777 1 10 1 159 HOSE 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 a different length or configuration This replacement hose in many instances will require cutting using old part as guide 71 Chevelle 307 exc C A C H D Red Monte Carlo 3989028 1 2 60 1 i I D moulded 3989028 71 Chevelle w C A C 307 exc Monte Carlo 71 Chevelle w 4BC 350 exc Monte Carlo