This page lists 5 cooling system parts for the 2026 Freightliner 108SD, across 2 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 2026 Freightliner 108SD keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. All 5 listed parts are Coolant / Antifreeze (4 parts) and Intercooler (1 part).
The 2026 Freightliner 108SD was sold with 3 engines. All 5 parts on this page fit every engine.
2 brands supply cooling system parts for the 2026 Freightliner 108SD, led by PRESTONE (4 parts) and SPECTRA PREMIUM (1 part).
Each part number listed for the 2026 Freightliner 108SD opens a page with every vehicle that part fits.
Coolant / Antifreeze
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2026 108SD engines | AFC10000 | 🇺🇸 US 🇨🇦 CA | Command ESi PrechargedPurple | View on Amazon |
| PRESTONE Fits: all 2026 108SD engines | AFC12100 | 🇺🇸 US 🇨🇦 CA | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
| PRESTONE Fits: all 2026 108SD engines | 115CEL | 🇺🇸 US 🇨🇦 CA | Celsius Extended Life Antifreeze or Command ESi Precharged Can1 Gallon | View on Amazon |
| PRESTONE Fits: all 2026 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.
PRESTONE supplies the 4 Coolant / Antifreeze parts for the 2026 Freightliner 108SD. All of them fit every engine offered in the 2026 108SD.
Part numbers include PRESTONE AFC10000, PRESTONE AFC12100 and PRESTONE 115CEL, among others listed above.
Intercooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM Fits: all 2026 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.
One part is listed for the 2026 Freightliner 108SD — SPECTRA PREMIUM 44011750.
Buying Cooling System Parts for a 2026 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.
- You do not need to pick an engine: every cooling system part on this page fits all 3 engine options (6.7L L6 DIESEL Turbocharged, 7.7L L6 DIESEL Turbocharged and 8.9L L6 DIESEL Turbocharged).
- 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 Intercooler .
Frequently Asked Questions
How many cooling system parts fit the 2026 Freightliner 108SD?
Our catalog currently lists 5 cooling system parts for the 2026 Freightliner 108SD across 2 subcategories and 2 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 2026 Freightliner 108SD engines?
No. On this page every cooling system part fits all 3 engine options (6.7L L6 DIESEL Turbocharged, 7.7L L6 DIESEL Turbocharged and 8.9L L6 DIESEL Turbocharged). You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of cooling system problems on a 2026 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 2026 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 2026 Freightliner 108SD?
Every part on this page already fits all 3 engine options (6.7L L6 DIESEL Turbocharged, 7.7L L6 DIESEL Turbocharged and 8.9L L6 DIESEL Turbocharged). 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 2026 Freightliner 108SD
Cooling System Parts for Other Freightliner 108SD Years
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