1966 Fargo W200 Pickup Cooling System Parts

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

16 Coolant / Antifreeze parts for the 1966 Fargo W200 Pickup come from 4 brands — PEAK, PRESTONE, FVP and 1 other brand. The "Popular" part is FVP MV5050GAL.

In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.

The Economy section lists 4 options from FVP, PRESTONE, PEAK and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.

In the Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.

In the Standard Replacement grade, PEAK, PRESTONE and FVP supply 6 parts: built to original-equipment specification. A representative part number is PRESTONE AF3300.

This table covers the adapters used to pressure-test this cooling system. Read more

This group shows a single part: MOTORAD 3003.

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

7 Radiator Cap parts for the 1966 Fargo W200 Pickup come from 4 brands — GATES, MOTORAD, SKP and 1 other brand. The "Popular" part is GATES 31508.

In the Locking Replacement grade, GATES, MOTORAD and SKP supply 3 parts: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is GATES 31508.

Standard Replacement: 4 parts, from MOTORAD, CALORSTAT, GATES and 1 other brand. A representative part number is MOTORAD T7.

Part numbers include GATES 31508, MOTORAD ST7 and SKP SKST7, among others listed above.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

9 Radiator Hose parts are listed for the 1966 Fargo W200 Pickup, from GATES and ACDELCO. GATES 25480 carries the "Popular" badge.

Economy: 5 parts, from GATES and ACDELCO. A representative part number is GATES 25480.

The Standard Replacement section: 4 options from GATES and ACDELCO. GATES 20065 is listed in this group.

This group includes GATES 25480, ACDELCO 31637 and ACDELCO 31638 and the remaining parts above.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

3 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 1966 Fargo W200 Pickup come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.

This group includes FEL-PRO 35064, MAHLE / CLEVITE C24109 and VICTOR REINZ 711352900.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

2 Water Pump parts are listed for the 1966 Fargo W200 Pickup, from SKP and GATES.

Economy: 1 part, from SKP. A representative part number is SKP SK1201060.

The Standard Replacement section: 1 option from GATES. GATES 43025 is listed in this group.

Listed part numbers: SKP SK1201060 and GATES 43025.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

2 Water Pump Gasket parts for the 1966 Fargo W200 Pickup come from 2 brands — MAHLE / CLEVITE and VICTOR REINZ.

Listed part numbers: MAHLE / CLEVITE K27564 and VICTOR REINZ 711452200.