This page lists 12 cooling system parts for the 2025 Freightliner 108SD, across 6 part types, covering all 3 engine options (6.7L L6 DIESEL Turbocharged, 7.7L L6 DIESEL Turbocharged and 8.9L L6 DIESEL Turbocharged). Every part shows its brand, manufacturer part number and fitment notes.
The cooling system system on the 2025 Freightliner 108SD 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 (4 parts), Radiator Hose (3 parts) and Intercooler Air Hose / Pipe (2 parts). The other 3 part types cover the remaining 3 parts.
The 2025 Freightliner 108SD was sold with 3 engines. 6 parts fit every engine; the other 6 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2025 Freightliner 108SD cooling system parts are PRESTONE (4 parts), GATES (4 parts) and CONTINENTAL (2 parts), plus 2 more brands. Quality grades include Universal Hose and Standard Replacement.
Each part number listed for the 2025 Freightliner 108SD opens a page with every vehicle that part fits.
Coolant / Antifreeze
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2025 108SD engines | AFC10000 | 🇺🇸 US 🇨🇦 CA | Command ESi PrechargedPurple | View on Amazon |
| PRESTONE Fits: all 2025 108SD engines | AFC12100 | 🇺🇸 US 🇨🇦 CA | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
| PRESTONE Fits: all 2025 108SD engines | 115CEL | 🇺🇸 US 🇨🇦 CA | Celsius Extended Life Antifreeze or Command ESi Precharged Can1 Gallon | View on Amazon |
| PRESTONE Fits: all 2025 108SD engines | 78065 | 🇺🇸 US 🇨🇦 CA | Heavy Duty | 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.
4 Coolant / Antifreeze parts for the 2025 Freightliner 108SD come from PRESTONE. Every part fits all 3 engine options (6.7L L6 DIESEL Turbocharged, 7.7L L6 DIESEL Turbocharged and 8.9L L6 DIESEL Turbocharged).
Listed part numbers: PRESTONE AFC10000, PRESTONE AFC12100 and PRESTONE 115CEL, plus the other parts above.
Coolant Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Fits: 6.7L L6 DIESEL Turbocharged, 8.9L L6 DIESEL Turbocharged | 57504 | 🇺🇸 US 🇨🇦 CA | Convoluted Charge Air | View on Amazon |
This table covers the hard pipes and extra hoses in the coolant circuit.
This group shows a single part: CONTINENTAL 57504.
Intercooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM Fits: all 2025 108SD engines | 44011750 | 🇺🇸 US 🇨🇦 CA | with 1in compressor portwith 41.125 IN X 25.75 IN X 1.9375 IN Core | View on Amazon |
This table covers the intercoolers that cool turbo or supercharger charge air.
This group shows a single part: SPECTRA PREMIUM 44011750.
Intercooler Air Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Fits: 7.7L L6 DIESEL Turbocharged, 8.9L L6 DIESEL Turbocharged | 57504 | 🇺🇸 US 🇨🇦 CA | Convoluted Charge Air | View on Amazon |
| GATES Fits: all 2025 108SD engines | 26200 | 🇺🇸 US 🇨🇦 CA | 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 2025 Freightliner 108SD come from 2 brands — CONTINENTAL and GATES. 1 part fits every engine; the other 1 is engine-specific.
Part numbers include CONTINENTAL 57504 and GATES 26200.
Radiator Hose
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 52169 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
Universal Hose (Straight, Bulk)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 8.9L L6 DIESEL Turbocharged | 31062 | 🇺🇸 US 🇨🇦 CA | Gold / ProfessionalStraight | View on Amazon |
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 24236 | 🇺🇸 US 🇨🇦 CA | Straight (Heavy-Duty 2-Ply)2.25" Inner Diameter | 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.
3 Radiator Hose parts are listed for the 2025 Freightliner 108SD, from GATES and ACDELCO.
The Standard Replacement section lists 1 option from GATES — built to original-equipment specification. GATES 52169 is listed in this group.
The Universal Hose (Straight, Bulk) section lists 2 options from ACDELCO and GATES — grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. ACDELCO 31062 is listed in this group.
Listed part numbers: GATES 52169, ACDELCO 31062 and GATES 24236.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 34308 | 🇺🇸 US 🇨🇦 CA | Heavy-Duty | 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.
One part is listed for the 2025 Freightliner 108SD — GATES 34308.
Buying Cooling System Parts for a 2025 Freightliner 108SD
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 Radiator Hose .
Frequently Asked Questions
How many cooling system parts fit the 2025 Freightliner 108SD?
Our catalog currently lists 12 cooling system parts for the 2025 Freightliner 108SD across 6 subcategories and 5 brands, covering all 3 engine options (6.7L L6 DIESEL Turbocharged, 7.7L L6 DIESEL Turbocharged and 8.9L L6 DIESEL Turbocharged). Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2025 Freightliner 108SD engines?
Some do. 6 parts fit every engine; the other 6 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 2025 Freightliner 108SD?
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 2025 Freightliner 108SD 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 2025 Freightliner 108SD?
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 2025 Freightliner 108SD
Cooling System Parts for Other Freightliner 108SD Years
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