1977 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 are listed for the 1977 Checker Marathon, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PRESTONE, PEAK and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Heavy Duty section lists 1 option from VALVOLINE — rated for severe service. VALVOLINE ZXG051 is listed in this group.

The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 6 options from PEAK, FVP and PRESTONE — built to original-equipment specification. FVP GREEN5050GAL is listed in this group.

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

9 Radiator Fan Clutch parts are listed for the 1977 Checker Marathon, from ACDELCO, FOUR SEASONS, GPD and 2 other brands. ACDELCO 1580244 carries the "Popular" badge.

Listed part numbers: ACDELCO 1580244, FOUR SEASONS 36952 and ACDELCO 1580245, plus the other parts 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

10 Radiator Hose parts for the 1977 Checker Marathon come from 4 brands — ACDELCO, DAYCO, GATES and 1 other brand. The "Popular" part is DAYCO 70344.

The Economy section: 4 options from GATES, ACDELCO and DAYCO. ACDELCO 31637 is listed in this group.

Standard Replacement: 6 parts, from DAYCO, ACDELCO, GATES and 1 other brand. A representative part number is DAYCO 70344.

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

32 Thermostat parts for the 1977 Checker Marathon come from 3 brands — MOTORAD, CALORSTAT and GATES. The "Popular" part is MOTORAD 300180. Economy, Heavy Duty, Performance, Premium and Standard Replacement are all represented, and Standard Replacement alone accounts for 15 parts.

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

8 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1977 Checker Marathon, from FEL-PRO, MAHLE / CLEVITE, GATES and 3 other brands. FEL-PRO 35062 carries the "Popular" badge.

This group includes FEL-PRO 35062, GATES 33624 and APEX AWO2000 and the remaining parts above.

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

4 Thermostat Housing / Water Outlet parts for the 1977 Checker Marathon come from 4 brands — DORMAN, GPD, FOUR SEASONS and 1 other brand.

The Economy section: 2 options from DORMAN and GPD. DORMAN 9022009 is listed in this group.

Standard Replacement: 2 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 84899.

This group includes DORMAN 9022009, GPD 8241307 and FOUR SEASONS 84899 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

12 Water Pump parts for the 1977 Checker Marathon come from 7 brands — GMB, US MOTOR WORKS, DAYCO and 4 other brands. The "Popular" part is GMB 1301250P.

The Economy section: 4 options from FVP, SKP, US MOTOR WORKS and 1 other brand. FVP US1121 is listed in this group.

The High Volume / Pressure section lists 4 options from GMB and US MOTOR WORKS — grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. GMB 1301250P is listed in this group.

Standard Replacement: 4 parts, from DAYCO, ACDELCO and GMB. A representative part number is ACDELCO 252595.

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

9 Water Pump Gasket parts are listed for the 1977 Checker Marathon, from FEL-PRO, APEX, MAHLE / CLEVITE and 1 other brand. FEL-PRO 5152 carries the "Popular" badge.

Listed part numbers: FEL-PRO 5152, FEL-PRO ES73030 and APEX AWP3018, plus the other parts above.

This table covers the Water Pump Stud kits. Read more

3 Water Pump Stud Kit parts for the 1977 Checker Marathon come from ARP.

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