66 Cooling system parts are listed for the 1964 Checker Marathon, in 7 part types, covering all 6 engine options (3.7L 226cid L6, 3.8L 230cid L6, 4.4L 266cid L6, 4.6L 283cid V8 and more). Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 1964 Checker Marathon keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Thermostat (28 parts), Coolant / Antifreeze (16 parts) and Radiator Hose (8 parts). The other 4 part types cover the remaining 14 parts.
The 1964 Checker Marathon was sold with 6 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
12 brands supply cooling system parts for the 1964 Checker Marathon, led by MOTORAD (21 parts), GATES (13 parts) and PEAK (7 parts), plus 9 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1964 Checker Marathon. 14 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and MOTORAD T13 (Radiator Cap). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: 3.7L 226cid L6, 4.4L 266cid L6 | AF3055 | 🇺🇸 US | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: 3.7L 226cid L6, 4.4L 266cid L6 | MV5050GAL | 🇺🇸 US | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular Fits: 3.7L 226cid L6, 4.4L 266cid L6 | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK Fits: 3.7L 226cid L6, 4.4L 266cid L6 | BQA1GAL | 🇺🇸 US | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE Fits: 3.7L 226cid L6, 4.4L 266cid L6 | 719009 | 🇺🇸 US | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: 3.7L 226cid L6, 4.4L 266cid L6 | ZXG051 | 🇺🇸 US | G05 Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: 3.7L 226cid L6, 4.4L 266cid L6 | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PEAK Fits: 3.7L 226cid L6, 4.4L 266cid L6 | PKP1GAL | 🇺🇸 US | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK Fits: 3.7L 226cid L6, 4.4L 266cid L6 | PXA1GAL | 🇺🇸 US | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE Fits: 3.7L 226cid L6, 4.4L 266cid L6 | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 3.7L 226cid L6, 4.4L 266cid L6 | GREEN5050GAL | 🇺🇸 US | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK Fits: 3.7L 226cid L6, 4.4L 266cid L6 | BMA1GAL | 🇺🇸 US | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: 3.7L 226cid L6, 4.4L 266cid L6 | RUA1GAL | 🇺🇸 US | Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: 3.7L 226cid L6, 4.4L 266cid L6 | FFA1GAL | 🇺🇸 US | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: 3.7L 226cid L6, 4.4L 266cid L6 | SEP1GAL | 🇺🇸 US | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE Fits: 3.7L 226cid L6, 4.4L 266cid L6 | AF3300 | 🇺🇸 US | Prime Conventional Green 1 Gallon | View on Amazon |
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.
16 Coolant / Antifreeze parts are listed for the 1964 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.
Cooling System Tester Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 3.7L 226cid L6 | 31413 | 🇺🇸 US | Cooling System PressureRadiator Cap | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 3003 | 🇺🇸 US | StandardIncluded In Tester Kit | View on Amazon |
This table covers the adapters used to pressure-test this cooling system.
2 Cooling System Tester Adapter parts are listed for the 1964 Checker Marathon, from GATES and MOTORAD.
Part numbers include GATES 31413 and MOTORAD 3003.
Radiator Cap
Locking Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 3.7L 226cid L6 | 31511 | 🇺🇸 US | Safety Release Radiator Cap | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | ST13 | 🇺🇸 US | Safety Lever | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: 3.7L 226cid L6 | T13 | 🇺🇸 US | Standard | View on Amazon |
| GATES Fits: 3.7L 226cid L6 | 31527 | 🇺🇸 US | OE Type | View on Amazon |
| SKP Fits: 3.7L 226cid L6 | SK10229 | 🇺🇸 US | Pressure Rating 13 psi | View on Amazon |
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.
5 Radiator Cap parts are listed for the 1964 Checker Marathon, from GATES, MOTORAD and SKP. MOTORAD T13 carries the "Popular" badge.
The Locking Replacement section lists 2 options from GATES and MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. GATES 31511 is listed in this group.
The Standard Replacement section: 3 options from MOTORAD, GATES and SKP. MOTORAD T13 is listed in this group.
Listed part numbers: MOTORAD T13, GATES 31511 and MOTORAD ST13, plus the other parts above.
Radiator Hose
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular Fits: 3.7L 226cid L6 | 25478 | 🇺🇸 US | Flexible | View on Amazon |
| ACDELCO Fits: 3.7L 226cid L6 | 31637 | 🇺🇸 US 🇨🇦 CA | Gold / ProfessionalFlexible | View on Amazon |
| ACDELCO Fits: 3.7L 226cid L6 | 31634 | 🇺🇸 US 🇨🇦 CA | Gold / ProfessionalFlexible | View on Amazon |
| GATES Fits: 3.7L 226cid L6 | 25474 | 🇺🇸 US | Flexible | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular Fits: 3.7L 226cid L6 | 21794 | 🇺🇸 US | Molded | View on Amazon |
| ACDELCO Fits: 3.7L 226cid L6 | 22007M | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| ACDELCO Fits: 3.7L 226cid L6 | 24238L | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| GATES Fits: 3.7L 226cid L6 | 20230 | 🇺🇸 US | Molded | View on Amazon |
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.
8 Radiator Hose parts for the 1964 Checker Marathon come from 2 brands — GATES and ACDELCO. The "Popular" part is GATES 25478.
The Economy section: 4 options from GATES and ACDELCO. GATES 25478 is listed in this group.
Standard Replacement: 4 parts, from GATES and ACDELCO. A representative part number is GATES 21794.
This group includes GATES 25478, ACDELCO 31637 and ACDELCO 31634 and the remaining parts above.
Thermostat
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 3.7L 226cid L6 | 33508 | 🇺🇸 US | Economy | View on Amazon |
| GATES Fits: 3.7L 226cid L6 | 33509 | 🇺🇸 US | Economy | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 300160 | 🇺🇸 US | Economy | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 300195 | 🇺🇸 US | Economy | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 300180 | 🇺🇸 US | Economy | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: 3.7L 226cid L6 | 5200160 | 🇺🇸 US | Ultra Stat | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 5200180 | 🇺🇸 US | Ultra Stat | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 5200195 | 🇺🇸 US | Ultra Stat | View on Amazon |
Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: 3.7L 226cid L6 | 2000160 | 🇺🇸 US | High Flow | View on Amazon |
| MOTORAD Popular Fits: 3.7L 226cid L6 | 2000180 | 🇺🇸 US | High Flow | View on Amazon |
| MOTORAD Popular Fits: 3.7L 226cid L6 | 2000195 | 🇺🇸 US | High Flow | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | MRD100 | 🇺🇸 US | Racing Thermostat | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: 3.7L 226cid L6 | 7200180 | 🇺🇸 US | Fail-Safe | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 7200195 | 🇺🇸 US | Fail-Safe | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 7200160 | 🇺🇸 US | Fail-Safe | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: 3.7L 226cid L6 | 200195 | 🇺🇸 US | Standard | View on Amazon |
| MOTORAD Popular Fits: 3.7L 226cid L6 | 200180 | 🇺🇸 US | Standard | View on Amazon |
| CALORSTAT Fits: 3.7L 226cid L6 | TH137892 | 🇺🇸 US | PerformanceDoes Not Include Seal | View on Amazon |
| CALORSTAT Fits: 3.7L 226cid L6 | THF137892 | 🇺🇸 US | High EfficiencyLarger Main Valve Seat | View on Amazon |
| CALORSTAT Fits: 3.7L 226cid L6 | TH137896 | 🇺🇸 US | PerformanceDoes Not Include Seal | View on Amazon |
| GATES Fits: 3.7L 226cid L6 | 33009 | 🇺🇸 US | OE Type | View on Amazon |
| GATES Fits: 3.7L 226cid L6 | 33006 | 🇺🇸 US | OE Type | View on Amazon |
| GATES Fits: 3.7L 226cid L6 | 33008 | 🇺🇸 US | OE Type | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 200205 | 🇺🇸 US | Standard | View on Amazon |
| MOTORAD Fits: 3.7L 226cid L6 | 200160 | 🇺🇸 US | Standard | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Fits: 4.4L 266cid L6 | TH137892 | 🇺🇸 US | PerformanceDoes Not Include Seal | View on Amazon |
| CALORSTAT Fits: 4.4L 266cid L6 | THF137892 | 🇺🇸 US | High EfficiencyLarger Main Valve Seat | View on Amazon |
| CALORSTAT Fits: 4.4L 266cid L6 | TH137896 | 🇺🇸 US | PerformanceDoes Not Include Seal | View on Amazon |
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.
28 Thermostat parts for the 1964 Checker Marathon come from 3 brands — MOTORAD, CALORSTAT and GATES. The "Popular" part is MOTORAD 2000160. They are grouped as Economy, Heavy Duty, Performance, Premium and Standard Replacement, with Standard Replacement the largest group at 10 parts from MOTORAD, CALORSTAT and GATES.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular Fits: 3.7L 226cid L6 | 33624 | 🇺🇸 US | Thermostat Gasket - 1 27/32" | View on Amazon |
| MOTORAD Popular Fits: 3.7L 226cid L6 | MG38 | 🇺🇸 US | Base Model | View on Amazon |
| FEL-PRO Fits: 3.7L 226cid L6 | 1273 | 🇺🇸 US | Water Outlet Seal | View on Amazon |
| MAHLE / CLEVITE Fits: 3.7L 226cid L6 | C26544 | 🇺🇸 US | Paper | View on Amazon |
| VICTOR REINZ Fits: 3.7L 226cid L6 | 711353700 | 🇺🇸 US | Housing to HeadThermostat Seal | View on Amazon |
| VICTOR REINZ Fits: 3.7L 226cid L6 | 711359200 | 🇺🇸 US | Rigid CarrierWater Outlet | View on Amazon |
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.
6 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1964 Checker Marathon, from VICTOR REINZ, GATES, MOTORAD and 2 other brands. GATES 33624 carries the "Popular" badge.
This group includes GATES 33624, MOTORAD MG38 and FEL-PRO 1273 and the remaining parts above.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VICTOR REINZ Fits: 3.7L 226cid L6 | 711398300 | 🇺🇸 US | View on Amazon |
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.
One part is listed for the 1964 Checker Marathon — VICTOR REINZ 711398300.
Buying Cooling System Parts for a 1964 Checker Marathon
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Every cooling system part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Thermostat and Coolant / Antifreeze .
Frequently Asked Questions
How many cooling system parts fit the 1964 Checker Marathon?
Our catalog currently lists 66 cooling system parts for the 1964 Checker Marathon across 7 subcategories and 12 brands, covering all 6 engine options (3.7L 226cid L6, 3.8L 230cid L6, 4.4L 266cid L6, 4.6L 283cid V8 and more). Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 1964 Checker Marathon engines?
Yes. Every cooling system part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 1964 Checker Marathon?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1964 Checker Marathon was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1964 Checker Marathon?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1964 Checker Marathon
Cooling System Parts for Other Checker Marathon Years
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