This page lists 37 cooling system parts for the 2019 Freightliner 108SD, across 7 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.
On the 2019 Freightliner 108SD, 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 (12 parts), Thermostat (7 parts) and Water Pump (6 parts). The other 4 part types cover the remaining 12 parts.
The 2019 Freightliner 108SD was sold with 3 engines. 18 parts fit every engine; the other 19 are engine-specific. Each part shows which engine(s) it fits.
14 brands supply cooling system parts for the 2019 Freightliner 108SD, led by GATES (8 parts), PRESTONE (7 parts) and VALVOLINE (3 parts), plus 11 more brands. Quality grades include Heavy Duty, Standard Replacement and High Volume / Pressure.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2019 Freightliner 108SD. 5 parts have it, including PRESTONE AF3100 (Coolant / Antifreeze) and SPECTRA PREMIUM 44011746 (Intercooler). 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: all 2019 108SD engines | AF3055 | 🇺🇸 US 🇨🇦 CA | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 2019 108SD engines | AF3100 | 🇺🇸 US 🇨🇦 CA | Prime Yellow - All VehiclesExtended Life | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 2019 108SD engines | ZXG051 | 🇺🇸 US 🇨🇦 CA | G05 Yellow1 Gallon | View on Amazon |
| PEAK Fits: all 2019 108SD engines | FCA1GAL | 🇺🇸 US 🇨🇦 CA | Fleet Charge1 Gallon | View on Amazon |
| PEAK Fits: all 2019 108SD engines | FXA1GAL | 🇺🇸 US 🇨🇦 CA | Final Charge Global1 Gallon | View on Amazon |
| PRESTONE Fits: all 2019 108SD engines | AFC10000 | 🇺🇸 US 🇨🇦 CA | Command ESi PrechargedPurple | View on Amazon |
| PRESTONE Fits: all 2019 108SD engines | AFC13000 | 🇺🇸 US 🇨🇦 CA | Command COR-Guard Nitrite Free-Noat Extended Life CoolantRed | View on Amazon |
| PRESTONE Fits: all 2019 108SD engines | AFC12100 | 🇺🇸 US 🇨🇦 CA | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
| VALVOLINE Fits: all 2019 108SD engines | 846439 | 🇺🇸 US 🇨🇦 CA | HD Nitrite Free Extended Life Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 2019 108SD engines | AF2100 | 🇺🇸 US 🇨🇦 CA | All Vehicles10yr/300k mi | View on Amazon |
| PRESTONE Fits: all 2019 108SD engines | AFMAX | 🇺🇸 US 🇨🇦 CA | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: all 2019 108SD engines | 861399 | 🇺🇸 US 🇨🇦 CA | 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 are listed for the 2019 Freightliner 108SD, from PRESTONE, VALVOLINE and PEAK. PRESTONE AF3100 carries the "Popular" badge. All of them fit every engine offered in the 2019 108SD.
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, PRESTONE supplies 1 part: the catalog's value-priced group. A representative part number is PRESTONE AF3100.
The Heavy Duty section lists 7 options from PRESTONE, VALVOLINE and PEAK — rated for severe service. VALVOLINE ZXG051 is listed in this group.
The Premium section lists 2 options from PRESTONE — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.
The Standard Replacement section lists 1 option from VALVOLINE — built to original-equipment specification. VALVOLINE 861399 is listed in this group.
Coolant Filter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DONALDSON Fits: 8.9L L6 DIESEL Turbocharged | P554685 | 🇺🇸 US 🇨🇦 CA | Outer Diameter: 93 mm (3.66")Length: 136 mm (5.35") | View on Amazon |
This table covers the Coolant filters. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.
One part is listed for the 2019 Freightliner 108SD — DONALDSON P554685.
Intercooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM Popular Fits: all 2019 108SD engines | 44011746 | 🇺🇸 US 🇨🇦 CA | with 42.625 IN X 21.625 IN X 1.9375 IN Corewith 3In Inlet | View on Amazon |
| GPD Fits: all 2019 108SD engines | 2711592 | 🇺🇸 US 🇨🇦 CA | with Compressor Port | View on Amazon |
| GPD Fits: all 2019 108SD engines | 2711593 | 🇺🇸 US 🇨🇦 CA | without Compressor Portwith Original Equipment (OE) # TXE10304844C | View on Amazon |
| SPECTRA PREMIUM Fits: all 2019 108SD engines | 44011749 | 🇺🇸 US 🇨🇦 CA | with 41.25 IN X 25.875 IN X 1.9375 IN Corewith 3In Inlet | View on Amazon |
| SPECTRA PREMIUM Fits: all 2019 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.
5 Intercooler parts are listed for the 2019 Freightliner 108SD, from SPECTRA PREMIUM and GPD. SPECTRA PREMIUM 44011746 carries the "Popular" badge. All of them fit every engine offered in the 2019 108SD.
This group includes SPECTRA PREMIUM 44011746, GPD 2711592 and GPD 2711593 and the remaining parts above.
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 2019 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 are listed for the 2019 Freightliner 108SD, from CONTINENTAL and GATES. 1 part fits every engine; the other 1 is engine-specific.
This group includes CONTINENTAL 57504 and GATES 26200.
Radiator Hose
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 52193 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 52169 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
Universal Hose (Straight, Bulk)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Fits: 8.9L L6 DIESEL Turbocharged | 57040 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Straight | View on Amazon |
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 24440 | 🇺🇸 US 🇨🇦 CA | Straight (Heavy-Duty 4-Ply)2.5" (75 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.
4 Radiator Hose parts for the 2019 Freightliner 108SD come from 2 brands — GATES and CONTINENTAL.
Standard Replacement: 2 parts, from GATES. A representative part number is GATES 52193.
In the Universal Hose (Straight, Bulk) grade, CONTINENTAL and GATES supply 2 parts: grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. A representative part number is CONTINENTAL 57040.
Part numbers include GATES 52193, GATES 52169 and CONTINENTAL 57040, among others listed above.
Thermostat
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 34308 | 🇺🇸 US 🇨🇦 CA | Heavy-Duty | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Fits: 8.9L L6 DIESEL Turbocharged | TH713082J | 🇺🇸 US 🇨🇦 CA | PerformanceIncludes 1 Rubber Gasket | View on Amazon |
| MOTORAD Fits: 8.9L L6 DIESEL Turbocharged | 407160 | 🇺🇸 US 🇨🇦 CA | Includes Seal | View on Amazon |
| MOTORAD Fits: 8.9L L6 DIESEL Turbocharged | 407180 | 🇺🇸 US 🇨🇦 CA | Includes Seal | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Fits: 6.7L L6 DIESEL Turbocharged, 7.7L L6 DIESEL Turbocharged | TH713082J | 🇺🇸 US 🇨🇦 CA | PerformanceIncludes 1 Rubber Gasket | View on Amazon |
| GATES Fits: 6.7L L6 DIESEL Turbocharged | 33915 | 🇺🇸 US 🇨🇦 CA | OE Type | View on Amazon |
| MOTORAD Fits: 6.7L L6 DIESEL Turbocharged | 923192 | 🇺🇸 US 🇨🇦 CA | 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.
7 Thermostat parts for the 2019 Freightliner 108SD come from 3 brands — MOTORAD, GATES and CALORSTAT.
Heavy Duty: 1 part, from GATES. A representative part number is GATES 34308.
Standard Replacement: 3 parts, from MOTORAD and CALORSTAT. A representative part number is CALORSTAT TH713082J.
3 further parts sit outside the graded sections, with the same engine-level match.
Listed part numbers: GATES 34308, CALORSTAT TH713082J and MOTORAD 407160, plus the other parts above.
Water Pump
High Volume / Pressure
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 6.7L L6 DIESEL Turbocharged | US7123H | 🇺🇸 US 🇨🇦 CA | B Series New Style ISB Engine | View on Amazon |
| GATES Fits: 6.7L L6 DIESEL Turbocharged | 42241HD | 🇺🇸 US 🇨🇦 CA | Water Pump (Heavy-Duty) | View on Amazon |
| US MOTOR WORKS Fits: 6.7L L6 DIESEL Turbocharged | US7123H | 🇺🇸 US 🇨🇦 CA | 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 🇨🇦 CA | 7 Vane Plastic Impeller | View on Amazon |
| DAYCO Fits: 6.7L L6 DIESEL Turbocharged | DP1000 | 🇺🇸 US 🇨🇦 CA | Serpentine Belt Driven | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 8.9L L6 DIESEL Turbocharged | 43570HD | 🇺🇸 US 🇨🇦 CA | Water Pump (Heavy-Duty) | 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 for the 2019 Freightliner 108SD come from 5 brands — GATES, FVP, US MOTOR WORKS and 2 other brands. The "Popular" part is MELLING MWP521.
The High Volume / Pressure section lists 3 options from FVP, GATES and US MOTOR WORKS — grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. FVP US7123H is listed in this group.
Standard Replacement: 2 parts, from MELLING and DAYCO. A representative part number is MELLING MWP521.
1 further part sits outside the graded sections, with the same engine-level match.
Part numbers include MELLING MWP521, FVP US7123H and GATES 42241HD, among others listed above.
Buying Cooling System Parts for a 2019 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 Thermostat .
Frequently Asked Questions
How many cooling system parts fit the 2019 Freightliner 108SD?
Our catalog currently lists 37 cooling system parts for the 2019 Freightliner 108SD across 7 subcategories and 14 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 2019 Freightliner 108SD engines?
Some do. 18 parts fit every engine; the other 19 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 2019 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 2019 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 2019 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 2019 Freightliner 108SD
Cooling System Parts for Other Freightliner 108SD Years
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