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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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  • Qty in Cart
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  • BESTfit AC Trinary Pressure/Fan Override Switch - Normally Open 71R-7550, RD5-4583-0

    BESTfit AC Trinary Pressure/Fan Override Switch - Normally Open 71R-7550, RD5-4583-0

    BESTFIT TRUCK PARTS

    $72.99
    BESTfit Female Trinary Switch 1/4 Inch Thread - Closed* High Quality A/C Trinary Pressure Switch* Normally Open* 1/4 Inch Female Fitting Thread* Refrigerant Type: R12/R134A* 12/24V Rating* 4...
    09-070017
    SKU:
    09-070017
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $72.99
    Qty in Cart: 0
    Price:
    $72.99
    Subtotal:
  • BESTfit York Style AC Compressor Clutch With 1 Groove

    BESTfit York Style AC Compressor Clutch With 1 Groove

    BESTFIT TRUCK PARTS

    $209.99
    BESTfit AC Clutch Single Groove York Style* High Quality AC Clutch* York Style* 6 Inch Diameter* 1 Groove* 2 Wire* 12 Volt* Sold Individually* Warranty On AC Clutches Against Defects In Workmanship &...
    09-0700159
    SKU:
    09-0700159
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $209.99
    Qty in Cart: 0
    Price:
    $209.99
    Subtotal:
  • BESTfit AC Compressor With 2 Groove Clutch SD510HD Assembly - Replaces ABPN83304052

    BESTfit AC Compressor With 2 Groove Clutch SD510HD Assembly - Replaces ABPN83304052

    BESTFIT TRUCK PARTS

    $328.99
    BESTfit AC Compressor With 2 Groove Clutch Assembly for Volvo & MackWe offer plenty of replacement part options that you need including 2 groove clutch AC compressor assemblies to replace part number...
    09-070010
    SKU:
    09-070010
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $328.99
    Qty in Cart: 0
    Price:
    $328.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Square To Round AC Compressor Mounting Bracket Kit

    BESTfit Square To Round AC Compressor Mounting Bracket Kit

    BESTFIT TRUCK PARTS

    $86.99
    BESTfit Air Conditioner Compressor Conversion Bracket KitThis A/C compressor bracket kit makes it easy to mount Sanden-type aluminum A/C compressors.* High Quality Compressor Mounting Bracket Kit* 13...
    09-070009
    SKU:
    09-070009
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $86.99
    Qty in Cart: 0
    Price:
    $86.99
    Subtotal:
  • FREE SHIPPING
    BESTfit AC Compressor With 6 Groove Clutch QP7H15-4425 Style - Replaces F69-6003121

    BESTfit AC Compressor With 6 Groove Clutch QP7H15-4425 Style - Replaces F69-6003121

    BESTFIT TRUCK PARTS

    $386.99
    BESTfit AC Compressor With 6 Groove Clutch Assembly For Kenworth & Peterbilt* High Quality AC Compressor* Replaces Sanden Type QP7H15-4425* 6 Grooves* R134A Refrigerant* 12V* 12 Clocking* GQ Cylinder...
    09-070007
    SKU:
    09-070007
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $386.99
    Qty in Cart: 0
    Price:
    $386.99
    Subtotal:
  • FREE SHIPPING
    BESTfit AC Compressor With Clutch Seltec QP7H15-4424 - Replaces F69-6001-122

    BESTfit AC Compressor With Clutch Seltec QP7H15-4424 - Replaces F69-6001-122

    BESTFIT TRUCK PARTS

    $310.99
    BESTfit AC Compressor With 6 Groove Clutch Assembly For Paccar* High Quality AC Compressor* With Clutch* Replaces Sanden Type QP7H15-4424* Sold Individually* Warranty On AC Compressors Against...
    09-070006
    SKU:
    09-070006
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $310.99
    Qty in Cart: 0
    Price:
    $310.99
    Subtotal:
  • BESTfit AC Compressor Sanden Style Single Groove 158MM Clutch With Single Wire Ear Mount

    BESTfit AC Compressor Sanden Style Single Groove 158MM Clutch With Single Wire Ear Mount

    BESTFIT TRUCK PARTS

    $255.99
    BESTfit Sanden Style AC Compressor With Single Groove 158MM Clutch & Single Wire Ear Mount* High Quality A/C Compressor* Single Groove 158MM Clutch * Single Wire Ear Mount* Sold Individually*...
    09-070000088
    SKU:
    09-070000088
    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 AC Compressor Sanden 4308 With 2 Groove 152MM Clutch - Replaces 4308157577, U4308

    BESTfit AC Compressor Sanden 4308 With 2 Groove 152MM Clutch - Replaces 4308157577, U4308

    BESTFIT TRUCK PARTS

    $298.99
    BESTfit Sanden 4308 Style AC Compressor With 2 Groove 152MM Clutch* High Quality A/C Compressor* 2 Groove 152MM Clutch* Sold Individually* Warranty On A/C Compressor Against Defects In Workmanship &...
    09-070000087
    SKU:
    09-070000087
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $298.99
    Qty in Cart: 0
    Price:
    $298.99
    Subtotal:
  • BESTfit Sanden SP-15/PAG 100 Oil - 8.45 Oz.

    BESTfit Sanden SP-15/PAG 100 Oil - 8.45 Oz.

    BESTFIT TRUCK PARTS

    $26.12
    BESTfit Sanden Compressor Oil For Use With R-124A Sanden Compressors* High Quality Oil* 8.45 Oz * Sold Individually* Warranty On Oil Against Defects In Workmanship & Material From Date Of Purchase***...
    09-070000084
    SKU:
    09-070000084
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $26.12
    Qty in Cart: 0
    Price:
    $26.12
    Subtotal:
  • AC PAG 100 Refrigerant Oil - 8 Oz.

    AC PAG 100 Refrigerant Oil - 8 Oz.

    AFTERMARKET

    $17.33
    100 Viscosity PAG Oil For A/C* High Quality A/C Refrigerant Oil* PAG 100 Viscosity* For R-134a Air Conditioning Systems* 8 Fluid Ounces (237 mL)* Sold Individually* Warranty On A/C Refrigerant Oil...
    09-070000083
    SKU:
    09-070000083
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Location:
    Made In USA
    $17.33
    Qty in Cart: 0
    Price:
    $17.33
    Subtotal:
  • BESTfit 70 Amp 12V 4 Terminal Carrier Relay With Diode Protection - Replaces 10-00328-00

    BESTfit 70 Amp 12V 4 Terminal Carrier Relay With Diode Protection - Replaces 10-00328-00

    BESTFIT TRUCK PARTS

    $27.99
    BESTfit 12V SPDT 70 Amp 4 Terminal Carrier Relay* High Quality Relay* Volts: 12V* Type: Spdt N.O.* Amps/Cfm/Btus: 70 Amp* Notes: 4 Terminal 2 Large 2 Small* Diode Protection: W/Diode* Sold...
    09-070000082
    SKU:
    09-070000082
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $27.99
    Qty in Cart: 0
    Price:
    $27.99
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  • BESTfit O Ring Seal Assortment Kit - 16-4259

    BESTfit O Ring Seal Assortment Kit - 16-4259

    BESTFIT TRUCK PARTS

    $22.88
    BESTfit Truck Air Parts - O-Ring Kit With Gaskets, Sealing Washers - 2 Of Each Size SealThe BESTfit Single Job stat Seal Assortment kit is specifically tailored to seal refrigerant systems utilizing...
    09-070000081
    SKU:
    09-070000081
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $22.88
    Qty in Cart: 0
    Price:
    $22.88
    Subtotal:
  • BESTfit AC Compressor With Clutch Sanden SD7H15 4627 With 2 Groove Pulley

    BESTfit AC Compressor With Clutch Sanden SD7H15 4627 With 2 Groove Pulley

    BESTFIT TRUCK PARTS

    $272.99
    BESTfit AC Compressor With Ear-Mount - Replaces ABPN83304382, LE1145, 4379RD571200 & F696002233* High Quality A/C Compressor* With Clutch * 2 Groove Pulley * Single Wire Connector * CW Rotation*...
    09-070000065
    SKU:
    09-070000065
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $272.99
    Qty in Cart: 0
    Price:
    $272.99
    Subtotal:
  • BESTfit Sanden 4646 AC Compressor With 132MM 2 Groove Clutch, Two 1/2 Inch Belts, Long Key Shaft

    BESTfit Sanden 4646 AC Compressor With 132MM 2 Groove Clutch, Two 1/2 Inch Belts, Long Key Shaft

    BESTFIT TRUCK PARTS

    $431.99
    BESTfit 12V 2 Groove AC Compressor With 7 Cylinders, Horizontal Port & Diode Protection* High Quality AC Compressor And Clutch* 12 Volts* 2 Groove* 132 MM Clutch Diameter* (2) 1/2 Inch Belt Type* 7...
    09-070000064
    SKU:
    09-070000064
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $431.99
    Qty in Cart: 0
    Price:
    $431.99
    Subtotal:
  • BESTfit Sanden 4627 AC Compressor With 125MM 2 Groove Clutch, Two 1/2 Inch Belts, Long Key Shaft

    BESTfit Sanden 4627 AC Compressor With 125MM 2 Groove Clutch, Two 1/2 Inch Belts, Long Key Shaft

    BESTFIT TRUCK PARTS

    $415.99
    BESTfit 12V 2 Groove AC Compressor With 7 Cylinders, Vertical Port & JD Head Type* High Quality AC Compressor And Clutch* 12 Volts* 2 Groove* 125 MM Clutch Diameter* (2) 1/2 Inch Belt Type* 7 Cyle...
    09-070000062
    SKU:
    09-070000062
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $415.99
    Qty in Cart: 0
    Price:
    $415.99
    Subtotal:
  • BESTfit Sanden 4626 AC Compressor With 132MM 2 Groove Clutch, Two 1/2 Inch Belts

    BESTfit Sanden 4626 AC Compressor With 132MM 2 Groove Clutch, Two 1/2 Inch Belts

    BESTFIT TRUCK PARTS

    $417.99
    BESTfit 12V 2 Groove AC Compressor With 7 Cylinders, Vertical Port & Long Key Shaft* High Quality AC Compressor And Clutch* 12 Volts* 2 Groove* 132 MM Clutch Diameter* (2) 1/2 Inch Belt Type* 7 Cyle...
    09-070000060
    SKU:
    09-070000060
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $417.99
    Qty in Cart: 0
    Price:
    $417.99
    Subtotal:
  • BESTfit Sanden 4405 AC Compressor With 119MM 10 Groove Clutch, Serpentine Belt, Vertical Port

    BESTfit Sanden 4405 AC Compressor With 119MM 10 Groove Clutch, Serpentine Belt, Vertical Port

    BESTFIT TRUCK PARTS

    $501.99
    BESTfit 12V 10 Groove AC Compressor With Vertical Port, 7 Cylinders, W/ Diode Protection & Long Key Shaft* High Quality AC Compressor And Clutch* 12 Volts* 10 Groove* 119 MM Clutch Diameter*...
    09-070000052
    SKU:
    09-070000052
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $501.99
    Qty in Cart: 0
    Price:
    $501.99
    Subtotal:
  • BESTfit York Style AC Compressor With 6.125 Inch Diameter 8 Groove Clutch - Replaces ET210L-25246C

    BESTfit York Style AC Compressor With 6.125 Inch Diameter 8 Groove Clutch - Replaces ET210L-25246C

    BESTFIT TRUCK PARTS

    $702.99
    BESTfit 12V 8 Groove AC Compressor With Tube-O Head, Serpentine Belt, 2 Cylinders & Keyed ShaftThe BESTfit 12V 8 Groove AC Compressor is a high-quality and reliable component that will keep your air...
    09-070000051
    SKU:
    09-070000051
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $702.99
    Qty in Cart: 0
    Price:
    $702.99
    Subtotal:
  • BESTfit York Style 6 Inch Diameter 2 Groove AC Compressor Clutch Assembly - Replaces 024-25238

    BESTfit York Style 6 Inch Diameter 2 Groove AC Compressor Clutch Assembly - Replaces 024-25238

    BESTFIT TRUCK PARTS

    $160.99
    BESTfit 12V AC Clutch Assembly With 2 - 1/2 Inch Belts & Keyed Shaft* High Quality AC Clutch* 12 Volts* 2 Wats* 2 Groove* (2) 1/2 Inch Belt Type* 2 Wire Metripack Wire Type* Keyed Shaft* W/ Diode*...
    09-070000048
    SKU:
    09-070000048
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $160.99
    Qty in Cart: 0
    Price:
    $160.99
    Subtotal:
  • BESTfit York Style 6 Inch Diameter 2 Groove AC Compressor Clutch Assembly - Replaces 501939, 14192, 024-21590

    BESTfit York Style 6 Inch Diameter 2 Groove AC Compressor Clutch Assembly - Replaces 501939, 14192, 024-21590

    BESTFIT TRUCK PARTS

    $125.99
    BESTfit 12V AC Clutch Assembly With 2 - 1/2 Inch Belts & Keyed Shaft* High Quality AC Clutch* 12 Volts* 2 Groove* (2) 1/2 Inch Belt Type* 1 Wire Weatherpak Wire Type* Keyed Shaft* W/ Diode* Sold...
    09-070000047
    SKU:
    09-070000047
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $125.99
    Qty in Cart: 0
    Price:
    $125.99
    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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