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International LT Engine Parts & Cooling

Looking for top-notch International LT engine parts and cooling essentials? At 4 State Trucks, we've got you covered with everything from Radiators to Filters. These parts ensure your truck runs smoothly for years. If you need help or have questions, our Part Pros are just a call away, ready to provide expert advice!4
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  • FASS Industrial Series Diesel 140 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 140 GPH Fuel System, Class 8

    FASS

    $1,032.99
    140 GPH Fuel System* High Quality Diesel Fuel System* Aluminum Housing* Fass Air Separation Port Ties Into OEM Engine Fuel Return* Preset 16 PSI Fuel Pressure* 140 Gallons Per Hour Flow Rating*...
    09-07030005
    SKU:
    09-07030005
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,032.99
    Qty in Cart: 0
    Price:
    $1,032.99
    Subtotal:
  • FASS Industrial Series Diesel 100 GPH Fuel System For Class 8 UIM Engines

    FASS Industrial Series Diesel 100 GPH Fuel System For Class 8 UIM Engines

    FASS

    $789.99
    100 GPH Fuel System Fits Class 8 UIM Engines* High Quality Diesel Fuel System* Aluminum Housing* Fass Air Separation Port Ties Into OEM Engine Fuel Return* Preset 16 PSI Fuel Pressure * 100 Gallons...
    09-07030003
    SKU:
    09-07030003
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $789.99
    Qty in Cart: 0
    Price:
    $789.99
    Subtotal:
  • FASS Industrial Series Diesel 290 GPH Fuel System, Class 8 For Cummins, Cat, Detroit Diesel Trucks

    FASS Industrial Series Diesel 290 GPH Fuel System, Class 8 For Cummins, Cat, Detroit Diesel Trucks

    FASS

    $1,096.99
    290 GPH Fuel System, Class 8 Fits Cummins, Cat, Detroit Diesel Trucks* High Quality Diesel Fuel System* Aluminum Housing* 8 Fass Air Separation Port Ties Into OEM Engine Fuel Return* Preset 16 PSI...
    09-07030002
    SKU:
    09-07030002
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,096.99
    Qty in Cart: 0
    Price:
    $1,096.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 3 Inch To 2.5 Inch Silicone Coolant Hose Reducer

    BESTfit 3 Inch To 2.5 Inch Silicone Coolant Hose Reducer

    BESTFIT TRUCK PARTS

    $37.44
    BESTfit 3 Inch To 2.5 Inch Silicone Coolant Hose Reducer* High Quality Coolant Hose* 3.00 ID To 2.50 ID* Silicone* 3.00 ID X 2.50 ID X 6 L* Sold Individually* Warranty On Coolant Hose Against Defects...
    09-0702077
    SKU:
    09-0702077
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Material Options:
    Silicone
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $37.44
    Qty in Cart: 0
    Price:
    $37.44
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 2.5 Inch Flexible Coolant Hose

    BESTfit 2.5 Inch Flexible Coolant Hose

    BESTFIT TRUCK PARTS

    $94.99
    BESTfit Flexible Coolant Hose* High Quality Coolant Hose* Specialty Hose* 2.50 Inch Inside Diameter* 2.82 Inch Outside Diameter* 8.50 Inch Length* Has Stainless Steel Reinforcement Rings* Once...
    09-0702047
    SKU:
    09-0702047
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $94.99
    Qty in Cart: 0
    Price:
    $94.99
    Subtotal:
  • FREE SHIPPING
    BESTfit Coolant Flex Hose Heavy Duty Silicone 2.5 ID X 36 Inch

    BESTfit Coolant Flex Hose Heavy Duty Silicone 2.5 ID X 36 Inch

    BESTFIT TRUCK PARTS

    $452.99
    BESTfit 2.50 ID X 36 Inch Heavy Duty Silicone Coolant Flex Hose* High Quality Silicone Coolant Hose* 2.50 Inch Inside Diameter - 64MM* 2.92 Inch Outside Diameter - 74MM* 36 Inches Length* 6 Inch Bend...
    09-0702045
    SKU:
    09-0702045
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $452.99
    Qty in Cart: 0
    Price:
    $452.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Coolant Hose 90 Degree

    BESTfit Coolant Hose 90 Degree

    BESTFIT TRUCK PARTS

    $78.99
    BESTfit Coolant Hose 90 Degree* High Quality Coolant Hose* 90 Degree* 2.5 Inch ID x 10 Inch* 2.920 Inch OD* Tighter Bend Radius Than Most Other Elbows* Temeperature Range Is -65F To +350 F Degrees*...
    09-0702044
    SKU:
    09-0702044
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Fleet Charge Pre-Mixed 50/50 Coolant- 1 Gallon

    Fleet Charge Pre-Mixed 50/50 Coolant- 1 Gallon

    PARTS DISTRIBUTING

    $13.30
    Antifreeze Fleet Charge Radiator CoolantRegulate the temperature in heavy duty diesel, gasoline, and natural gas engines with this high quality Fleet Coolant/Antifreeze. It is the original fully...
    09-0702042
    SKU:
    09-0702042
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Capacity:
    1 Gallon
    Ready To Ship:
    Yes
    $13.30
    Qty in Cart: 0
    Price:
    $13.30
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 1 Inch ID X 25 Feet

    BESTfit Blue Silicone Heater Hose - 1 Inch ID X 25 Feet

    BESTFIT TRUCK PARTS

    $145.99
    BESTfit Blue Silicone Heater Hose - 1 Inch ID X 25 Feet* High Quality Heater Hose* Made Of Silicone* Blue* Dimensions:  - 1 Inch Inner Diameter   - 25 Feet* Sold Individually* Warranty On Heater Hose...
    09-070200007
    SKU:
    09-070200007
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $145.99
    Qty in Cart: 0
    Price:
    $145.99
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - .75 Inch ID X 25 Feet

    BESTfit Blue Silicone Heater Hose - .75 Inch ID X 25 Feet

    BESTFIT TRUCK PARTS

    $95.99
    Blue Silicone Heater Hose - 0.75 Inch ID X 25 Feet* High Quality Heater Hose* Made Of Silicone* Blue* Dimensions:  - 0.750 Inch ID   - 25 Feet* Sold Individually* Warranty On Heater Hose Against...
    09-070200006
    SKU:
    09-070200006
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $95.99
    Qty in Cart: 0
    Price:
    $95.99
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 0.625 Inch ID X 25 Feet

    BESTfit Blue Silicone Heater Hose - 0.625 Inch ID X 25 Feet

    BESTFIT TRUCK PARTS

    $71.99
    BESTfit Blue Silicone Heater Hose - 0.625 Inch ID X 25 Foot* High Quality Heater Hose* Made Of Silicone* Blue* Dimensions:  - 0.625 Inch ID   - 25 Feet* Sold Individually* Warranty On Heater Hose...
    09-070200005
    SKU:
    09-070200005
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $71.99
    Qty in Cart: 0
    Price:
    $71.99
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 0.5 Inch ID X25 Feet

    BESTfit Blue Silicone Heater Hose - 0.5 Inch ID X25 Feet

    BESTFIT TRUCK PARTS

    $81.99
    BESTfit Blue Silicone Heater Hose - 0.5 Inch ID X 25 Foot* High Quality Heater Hose * Silicone* Blue * 0.500 Inch I.D.* 25 Feet* Sold Individually * Warranty On Heater Hose Against Defects In...
    09-070200004
    SKU:
    09-070200004
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $81.99
    Qty in Cart: 0
    Price:
    $81.99
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 0.25 Inch ID X 25 Feet

    BESTfit Blue Silicone Heater Hose - 0.25 Inch ID X 25 Feet

    BESTFIT TRUCK PARTS

    $55.99
    BESTfit Blue Silicone Heater Hose - 0.25 Inch ID X 25 Foot* High Quality Heater Hose* Silicone * Blue * 0.25 I.D. * 25 Feet * Sold Individually * Warranty On Heater Hose Against Defects In...
    09-070200002
    SKU:
    09-070200002
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $55.99
    Qty in Cart: 0
    Price:
    $55.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose

    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose

    BESTFIT TRUCK PARTS

    $32.24
    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose* High Quality Silicone Coolant Hose* 2.5 Inch To 2 inch Diameter* 6 Inches Long* Can Be Used For CAC Hose* Temp Range -65F To +500F* Sold...
    09-070126
    SKU:
    09-070126
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $32.24
    Qty in Cart: 0
    Price:
    $32.24
    Subtotal:
  • On Sale
    Limited Quantity Available
    FREE SHIPPING OVER $249
    BESTfit 3.75 Inch X 3 Foot Charge Air Cooler Hose

    BESTfit 3.75 Inch X 3 Foot Charge Air Cooler Hose

    BESTFIT TRUCK PARTS

    Now: $45.76
    Was: $194.99
    BESTfit Charge Air Cooler Hose* High Quality Charge Air Cooler Hose* 3.75 Inch ID x 3 Foot* Sold Individually* Warranty On Charge Air Cooler Hoses Against Defects In Workmanship & Material From Date...
    09-070121
    SKU:
    09-070121
    Truck Class:
    Light Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $45.76
    Was: $194.99
    Qty in Cart: 0
    Price:
    Now: $45.76
    Was: $194.99
    Subtotal:
  • BESTfit 3 ID X 6 Inch 4 Ply Nomex Hot Side Coupler Hump Hose

    BESTfit 3 ID X 6 Inch 4 Ply Nomex Hot Side Coupler Hump Hose

    BESTFIT TRUCK PARTS

    $38.57
    BESTfit High Temperature Coupler HoseThis silicone 4 ply and 6 inch long hump hose is made of a flexible silicone rubber shaped like a hump or a wave. It is used to connect two 3 inch ID pipes or...
    09-070106
    SKU:
    09-070106
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $38.57
    Qty in Cart: 0
    Price:
    $38.57
    Subtotal:
  • BESTfit AC Compressor Clutch 12 Volt York Style With 1 Wire

    BESTfit AC Compressor Clutch 12 Volt York Style With 1 Wire

    BESTFIT TRUCK PARTS

    $178.99
    BESTfit AC Clutch York Style 6 Inch Diameter* High Quality AC Clutch* York Style* 6 Inch Diameter* A1 Groove* 1 Wire* 12 Volt* Key Shaft* 3 Inch MD* Sold Individually* Warranty On AC Clutches Against...
    09-070098
    SKU:
    09-070098
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $178.99
    Qty in Cart: 0
    Price:
    $178.99
    Subtotal:
  • BESTfit AC Compressor W/ 6 Groove Clutch & Single Wire

    BESTfit AC Compressor W/ 6 Groove Clutch & Single Wire

    BESTFIT TRUCK PARTS

    $379.99
    AC Compressor W/ 6 Groove Clutch & Single Wire By BESTfit Replaces 6513025, 7513025* High Quality AC Compressor* 6 Groove 125MM Clutch* Single Wire* OEM Number Inch S 5513025, 6513025, 7513025,...
    09-070024
    SKU:
    09-070024
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $379.99
    Qty in Cart: 0
    Price:
    $379.99
    Subtotal:
  • BESTfit Ear-Mount AC Compressor Sanden With 2 Groove 132MM Clutch, 1 Wire Connection

    BESTfit Ear-Mount AC Compressor Sanden With 2 Groove 132MM Clutch, 1 Wire Connection

    BESTFIT TRUCK PARTS

    $255.99
    BESTfit AC Compressor - Replaces 2241180000, ABPN83304843, N83-304274, N83-304572 & N83-304843* High Quality AC Compressor* Connector: 1 Wire Female Weatherpack* Connector Type: Female* Cylinder...
    09-0700218
    SKU:
    09-0700218
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $255.99
    Qty in Cart: 0
    Price:
    $255.99
    Subtotal:
  • BESTfit A/C Compressor Sanden SD7H15 W/ 8 Groove Clutch

    BESTfit A/C Compressor Sanden SD7H15 W/ 8 Groove Clutch

    BESTFIT TRUCK PARTS

    $283.99
    BESTfit AC Compressor Sanden SD7H15* High Quality AC Compressor* Ear Mount* With 8 Groove Clutch* 12Volt* 2 Wire Plug* OEM Number 1804173, 1804178, F696001211, And F696002212 5361* Sold Individually*...
    09-070020
    SKU:
    09-070020
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $283.99
    Qty in Cart: 0
    Price:
    $283.99
    Subtotal:
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Adding your products to cart

Find premium International LT Engine Parts and cooling options in our collection, which provide essential components to keep your truck's engine and cooling system performing at their best. This selection ensures optimal engine efficiency and cooling, from air conditioning parts to radiator hoses and engine accessories. With reliable, durable, and affordable products, you can easily upgrade or maintain your International LT. Keep your engine running smoothly and extend its life with these top-quality parts.

Frequently Asked Questions About International LT Engine Parts & Cooling

What year models of International LT trucks are these engine cooling parts compatible with?

Our International LT engine cooling parts are designed for 2017 and newer International LT Series trucks. Most radiators, charge air coolers, and cooling assemblies fit 2017-2024 models, but specific compatibility can vary based on your engine type (Cummins X15, International A26, or Detroit DD13/DD15). Always verify your OEM and engine serial number when ordering to ensure proper fitment, as some cooling components differ between EPA17 and EPA21 emissions standards.

How difficult is it to install a replacement radiator or charge air cooler on an International LT?

Installing cooling components typically requires 3-6 hours for experienced technicians. Radiator replacement involves draining coolant, disconnecting upper and lower hoses, transmission cooler lines (if equipped), and removing the mounting brackets. Charge air coolers require removal of the intercooler pipes and careful handling to avoid damaging the fins. Most installations require basic hand tools, though some models need special coolant fill procedures to prevent air pockets. We recommend having a service manual handy for torque specifications and coolant capacity information.

What's the difference between OEM and aftermarket cooling parts for the International LT?

OEM parts are manufactured to International's exact specifications and typically carry a 1-2 year warranty. Aftermarket options from reputable brands like Dura-Lite, Freightliner Alliance, and Road Choice often use the same core designs but may feature upgraded materials like all-aluminum construction versus plastic end tanks. Quality aftermarket radiators can offer better cooling efficiency and longer service life at 30-40% less cost than OEM. Key differences to check include core thickness, fin density, and whether the unit includes integrated oil coolers if your truck requires them.

How do I know if my International LT needs a standard or heavy-duty cooling package replacement?

Check your truck's build sheet or the RPO codes on the driver's door jamb. Heavy-duty cooling packages (typically RPO code NHT or XHT) feature larger radiator cores, higher-capacity charge air coolers, and upgraded fan clutches. These are common on trucks with high-horsepower engines (450+ HP) or those spec'd for vocational use. Standard cooling is sufficient for most highway applications under 450 HP. Using the wrong cooling package can lead to overheating issues or reduced fuel economy from excessive cooling capacity.

What are the most common cooling system failure points on International LT trucks?

Based on service records and customer feedback, the most frequent issues include: EGR cooler failures on 2017-2019 models (often showing white smoke or coolant loss), charge air cooler leaks causing boost pressure issues, and radiator end tank cracks on units with over 300,000 miles. The coolant surge tanks on early LT models are prone to stress cracks near the cap. Fan clutch solenoids typically fail between 400,000-500,000 miles, causing either constant fan engagement or no engagement. Regular coolant testing and 150,000-mile coolant flushes can prevent many of these failures.


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