1965 Checker Marathon 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 1965 Checker Marathon 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, VALVOLINE supplies 1 part: rated for severe service. A representative part number is VALVOLINE ZXG051.

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, FVP and PRESTONE supply 6 parts: built to original-equipment specification. A representative part number is FVP GREEN5050GAL.

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

2 Cooling System Tester Adapter parts for the 1965 Checker Marathon come from 2 brands — GATES and MOTORAD.

Part numbers include GATES 31413 and 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

5 Radiator Cap parts for the 1965 Checker Marathon come from 3 brands — GATES, MOTORAD and SKP. The "Popular" part is MOTORAD T13.

In the Locking Replacement grade, GATES and MOTORAD supply 2 parts: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is GATES 31511.

Standard Replacement: 3 parts, from MOTORAD, GATES and SKP. A representative part number is MOTORAD T13.

Listed part numbers: MOTORAD T13, GATES 31511 and MOTORAD ST13, plus the other parts above.

This table covers the Radiator Fan clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

19 Radiator Fan Clutch parts for the 1965 Checker Marathon come from 7 brands — FOUR SEASONS, HAYDEN, ACDELCO and 4 other brands. The "Popular" part is ACDELCO 1580244.

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

16 Radiator Hose parts are listed for the 1965 Checker Marathon, from CONTINENTAL, DAYCO, ACDELCO and 1 other brand. DAYCO 81141 carries the "Popular" badge.

Economy: 7 parts, from CONTINENTAL, DAYCO, ACDELCO and 1 other brand. A representative part number is DAYCO 81141.

The Standard Replacement section: 9 options from CONTINENTAL, DAYCO, GATES and 1 other brand. DAYCO 70081 is listed in this group.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

22 Thermostat parts are listed for the 1965 Checker Marathon, from MOTORAD and GATES. MOTORAD 2000160 carries the "Popular" badge.

Economy: 5 parts, from MOTORAD and GATES. A representative part number is GATES 33508.

The Heavy Duty section: 3 options from MOTORAD. MOTORAD 5200160 is listed in this group.

In the Performance grade, MOTORAD supplies 4 parts: engineered beyond original-equipment specification. A representative part number is MOTORAD 2000160.

The Premium section: 3 options from MOTORAD. MOTORAD 7200180 is listed in this group.

The Standard Replacement section: 7 options from MOTORAD and GATES. MOTORAD 200195 is listed in this group.

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

11 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 1965 Checker Marathon come from 5 brands — MAHLE / CLEVITE, FEL-PRO, VICTOR REINZ and 2 other brands. The "Popular" part is FEL-PRO 35062.

This table covers the housings and outlets the thermostat sits in. Read more

4 Thermostat Housing / Water Outlet parts are listed for the 1965 Checker Marathon, from DORMAN, GPD, FOUR SEASONS and 1 other brand.

Economy: 2 parts, from DORMAN and GPD. A representative part number is DORMAN 9022018.

The Standard Replacement section: 2 options from FOUR SEASONS and MOTORAD. FOUR SEASONS 84852 is listed in this group.

This group includes DORMAN 9022018, GPD 8241278 and FOUR SEASONS 84852 and the remaining parts above.

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

13 Water Pump parts are listed for the 1965 Checker Marathon, from US MOTOR WORKS, GMB, DAYCO and 1 other brand. GMB 1301350P carries the "Popular" badge.

Economy: 4 parts, from FVP and US MOTOR WORKS. A representative part number is FVP US895.

In the High Volume / Pressure grade, US MOTOR WORKS and GMB supply 3 parts: grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. A representative part number is GMB 1301350P.

The Standard Replacement section: 6 options from DAYCO and GMB. DAYCO DP846 is listed in this group.

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

10 Water Pump Gasket parts for the 1965 Checker Marathon come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ. The "Popular" part is FEL-PRO 5152.

This table covers the Water Pump Stud kits. Read more

ARP supplies the 3 Water Pump Stud Kit parts for the 1965 Checker Marathon.

Part numbers include ARP 1343204, ARP 1343203 and ARP 4343203.