24 Cooling system parts are listed for the 1949 Desoto S-13, in 5 part types, covering the 3.9L 237cid L6 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1949 Desoto S-13, 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. Most of the listed parts are Coolant / Antifreeze (15 parts), Thermostat (3 parts) and Thermostat / Thermostat Housing / Water Outlet Seal (3 parts). The other 2 part types cover the remaining 3 parts.
The 1949 Desoto S-13 came with a single engine, the 3.9L 237cid L6, and every part is verified against it.
8 brands supply cooling system parts for the 1949 Desoto S-13, led by PEAK (7 parts), PRESTONE (5 parts) and MOTORAD (4 parts), plus 5 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 1949 Desoto S-13. 3 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and PRESTONE AF3100 (Coolant / Antifreeze). 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 | AF3055 | 🇺🇸 US | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | MV5050GAL | 🇺🇸 US | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇺🇸 US | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE | 719009 | 🇺🇸 US | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇺🇸 US | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇺🇸 US | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | GREEN5050GAL | 🇺🇸 US | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK | BMA1GAL | 🇺🇸 US | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK | RUA1GAL | 🇺🇸 US | Conventional Green1 Gallon | View on Amazon |
| PEAK | FFA1GAL | 🇺🇸 US | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK | SEP1GAL | 🇺🇸 US | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE | 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.
15 Coolant / Antifreeze parts are listed for the 1949 Desoto S-13, 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 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.
Radiator Hose
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO | 81171 | 🇺🇸 US | Flex Radiator Hose | View on Amazon |
| DAYCO | 81321 | 🇺🇸 US | Flex Radiator Hose | 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.
2 Radiator Hose parts for the 1949 Desoto S-13 come from DAYCO.
Part numbers include DAYCO 81171 and DAYCO 81321.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | 400580 | 🇺🇸 US | Includes Seal | View on Amazon |
| MOTORAD | 218160 | 🇺🇸 US | Includes Seal | View on Amazon |
| MOTORAD | 218180 | 🇺🇸 US | Includes 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.
3 Thermostat parts for the 1949 Desoto S-13 come from MOTORAD.
Listed part numbers: MOTORAD 400580, MOTORAD 218160 and MOTORAD 218180.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | 35063 | 🇺🇸 US | 2-1/2 (In) Inside DiameterWater Outlet Seal | View on Amazon |
| MOTORAD | MG40 | 🇺🇸 US | View on Amazon | |
| VICTOR REINZ | 711353100 | 🇺🇸 US | 2-1/2 IN I.D.with 2 Bolt Holes | 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.
3 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1949 Desoto S-13, from FEL-PRO, MOTORAD and VICTOR REINZ.
This group includes FEL-PRO 35063, MOTORAD MG40 and VICTOR REINZ 711353100.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VICTOR REINZ | 711407900 | 🇺🇸 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 1949 Desoto S-13 — VICTOR REINZ 711407900.
Buying Cooling System Parts for a 1949 Desoto S-13
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.
- Confirm you have the 3.9L 237cid L6 engine — every part on this page is matched to it.
- 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: Coolant / Antifreeze and Thermostat .
Frequently Asked Questions
How many cooling system parts fit the 1949 Desoto S-13?
Our catalog currently lists 24 cooling system parts for the 1949 Desoto S-13 across 5 subcategories and 8 brands, covering the 3.9L 237cid L6 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 1949 Desoto S-13?
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 1949 Desoto S-13 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 1949 Desoto S-13?
Every part on this page is matched to the 3.9L 237cid L6 engine. 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 1949 Desoto S-13
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