32 Cooling system parts are listed for the 2017 Freightliner S2, in 6 part types, covering both the 6.7L L6 DIESEL Turbocharged and the 8.0L V8 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 2017 Freightliner S2 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 Coolant / Antifreeze (12 parts), Water Pump (6 parts) and Radiator Hose (5 parts). The other 3 part types cover the remaining 9 parts.
The 2017 Freightliner S2 was sold with both the 6.7L L6 DIESEL Turbocharged and the 8.0L V8 Turbocharged. 7 parts fit every engine; the other 25 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2017 Freightliner S2 cooling system parts are PRESTONE (7 parts), GATES (6 parts) and VALVOLINE (3 parts), plus 11 more brands. Quality grades include Standard Replacement, Heavy Duty and High Volume / Pressure.
6 parts on this 2017 Freightliner S2 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including PRESTONE AF3100 (Coolant / Antifreeze) and GATES 21194 (Radiator Hose). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2017 S2 engines | AF3055 | 🇺🇸 US 🇨🇦 CA | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 2017 S2 engines | AF3100 | 🇺🇸 US 🇨🇦 CA | Prime Yellow - All VehiclesExtended Life | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: 6.7L L6 DIESEL Turbocharged | ZXG051 | 🇺🇸 US | G05 Yellow1 Gallon | View on Amazon |
| PEAK Fits: 6.7L L6 DIESEL Turbocharged | FCA1GAL | 🇺🇸 US | Fleet Charge1 Gallon | View on Amazon |
| PEAK Fits: 6.7L L6 DIESEL Turbocharged | FXA1GAL | 🇺🇸 US | Final Charge Global1 Gallon | View on Amazon |
| PRESTONE Fits: all 2017 S2 engines | AFC10000 | 🇺🇸 US 🇨🇦 CA | Command ESi PrechargedPurple | View on Amazon |
| PRESTONE Fits: all 2017 S2 engines | AFC13000 | 🇺🇸 US 🇨🇦 CA | Command COR-Guard Nitrite Free-Noat Extended Life CoolantRed | View on Amazon |
| PRESTONE Fits: all 2017 S2 engines | AFC12100 | 🇺🇸 US 🇨🇦 CA | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
| VALVOLINE Fits: 6.7L L6 DIESEL Turbocharged | 846439 | 🇺🇸 US | HD Nitrite Free Extended Life Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 2017 S2 engines | AF2100 | 🇺🇸 US 🇨🇦 CA | All Vehicles10yr/300k mi | View on Amazon |
| PRESTONE Fits: all 2017 S2 engines | AFMAX | 🇺🇸 US 🇨🇦 CA | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 6.7L L6 DIESEL Turbocharged | 861399 | 🇺🇸 US | G40 Pink1 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.
12 Coolant / Antifreeze parts for the 2017 Freightliner S2 come from 3 brands — PRESTONE, VALVOLINE and PEAK. The "Popular" part is PRESTONE AF3100. 7 parts fit every engine; the other 5 are engine-specific.
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 1 option from PRESTONE — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.
In the Heavy Duty grade, PRESTONE, VALVOLINE and PEAK supply 7 parts: rated for severe service. A representative part number is VALVOLINE ZXG051.
In the Premium grade, PRESTONE supplies 2 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, VALVOLINE supplies 1 part: built to original-equipment specification. A representative part number is VALVOLINE 861399.
Coolant Level Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 6.7L L6 DIESEL Turbocharged | 1816403 | 🇺🇸 US | Aluminum | View on Amazon |
| GPD Fits: 6.7L L6 DIESEL Turbocharged | 1816610 | 🇺🇸 US | BRASS | View on Amazon |
This table covers the Coolant Level sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
2 Coolant Level Sensor parts for the 2017 Freightliner S2 come from GPD.
This group includes GPD 1816403 and GPD 1816610.
Intercooler Air Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 6.7L L6 DIESEL Turbocharged | 26200 | 🇺🇸 US | Turbocharger Hose (Ring-Retained)Straight Hose | View on Amazon |
| GATES Fits: 6.7L L6 DIESEL Turbocharged | 26201 | 🇺🇸 US | Turbocharger Hose (Ring-Retained)Straight Hose | View on Amazon |
This table covers the Intercooler Air Hose pipes.
2 Intercooler Air Hose / Pipe parts for the 2017 Freightliner S2 come from GATES.
Listed part numbers: GATES 26200 and GATES 26201.
Radiator Hose
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular Fits: 6.7L L6 DIESEL Turbocharged | 21194 | 🇺🇸 US | Molded | View on Amazon |
| ACDELCO Fits: 6.7L L6 DIESEL Turbocharged | 20125S | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| DAYCO Fits: 6.7L L6 DIESEL Turbocharged | 72140 | 🇺🇸 US | Curved | View on Amazon |
| GATES Fits: 6.7L L6 DIESEL Turbocharged | 52168 | 🇺🇸 US | Molded | View on Amazon |
Universal Hose (Straight, Bulk)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 6.7L L6 DIESEL Turbocharged | 24232 | 🇺🇸 US | Straight (Heavy-Duty 2-Ply)2" (60 psi) | 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.
5 Radiator Hose parts are listed for the 2017 Freightliner S2, from GATES, ACDELCO and DAYCO. GATES 21194 carries the "Popular" badge.
The Standard Replacement section: 4 options from GATES, ACDELCO and DAYCO. GATES 21194 is listed in this group.
The Universal Hose (Straight, Bulk) section lists 1 option from GATES — grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. GATES 24232 is listed in this group.
Listed part numbers: GATES 21194, ACDELCO 20125S and DAYCO 72140, plus the other parts above.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Fits: 6.7L L6 DIESEL Turbocharged | TH713082J | 🇺🇸 US | PerformanceIncludes 1 Rubber Gasket | View on Amazon |
| GATES Fits: 6.7L L6 DIESEL Turbocharged | 33915 | 🇺🇸 US | OE Type | View on Amazon |
| MOTORAD Fits: 6.7L L6 DIESEL Turbocharged | 923192 | 🇺🇸 US | Includes Seal | View on Amazon |
| MOTORAD Fits: 8.0L V8 Turbocharged | 400995 | 🇺🇸 US 🇨🇦 CA | 195 Degrees FOE Specified Temperature 195 Degrees | View on Amazon |
| MOTORAD Fits: 8.0L V8 Turbocharged | 400980 | 🇺🇸 US 🇨🇦 CA | 180 Degrees FOE Specified Temperature | 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.
5 Thermostat parts are listed for the 2017 Freightliner S2, from MOTORAD, CALORSTAT and GATES.
Part numbers include CALORSTAT TH713082J, GATES 33915 and MOTORAD 923192, among others listed above.
Water Pump
High Volume / Pressure
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| US MOTOR WORKS Popular Fits: 6.7L L6 DIESEL Turbocharged | US7123H | 🇺🇸 US | B Series New Style ISB Engine | View on Amazon |
| FVP Fits: 6.7L L6 DIESEL Turbocharged | US7123H | 🇺🇸 US | B Series New Style ISB Engine | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING Popular Fits: 6.7L L6 DIESEL Turbocharged | MWP521 | 🇺🇸 US | 7 Vane Plastic Impeller | View on Amazon |
| FVP Fits: 6.7L L6 DIESEL Turbocharged | 1962420 | 🇺🇸 US | 94.4 mm Pulley | View on Amazon |
| GMB Fits: 6.7L L6 DIESEL Turbocharged | 1962420 | 🇺🇸 US | 94.4 mm Pulley | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYTON Fits: 6.7L L6 DIESEL Turbocharged | 9024004 | 🇺🇸 US | View on Amazon |
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.
6 Water Pump parts are listed for the 2017 Freightliner S2, from FVP, US MOTOR WORKS, MELLING and 2 other brands. US MOTOR WORKS US7123H carries the "Popular" badge.
In the High Volume / Pressure grade, US MOTOR WORKS and FVP supply 2 parts: grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. A representative part number is US MOTOR WORKS US7123H.
The Standard Replacement section: 3 options from MELLING, FVP and GMB. MELLING MWP521 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include US MOTOR WORKS US7123H and MELLING MWP521, among others listed above.
Buying Cooling System Parts for a 2017 Freightliner S2
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. Some cooling system parts fit every engine; others are 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: Coolant / Antifreeze and Water Pump .
Frequently Asked Questions
How many cooling system parts fit the 2017 Freightliner S2?
Our catalog currently lists 32 cooling system parts for the 2017 Freightliner S2 across 6 subcategories and 14 brands, covering both the 6.7L L6 DIESEL Turbocharged and the 8.0L V8 Turbocharged. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2017 Freightliner S2 engines?
Some do. 7 parts fit every engine; the other 25 are engine-specific. Each row (and the filter at the top) shows which. 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 2017 Freightliner S2?
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 2017 Freightliner S2 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 2017 Freightliner S2?
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 2017 Freightliner S2
Cooling System Parts for Other Freightliner S2 Years
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