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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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  • FREE SHIPPING OVER $249
    BESTfit Stainless Steel T-Bolt Clamp For Charge Air Coolers

    BESTfit Stainless Steel T-Bolt Clamp For Charge Air Coolers

    BESTFIT TRUCK PARTS

    $8.54 - $31.20
    Prevent leaks and maintain peak airflow in your charge air cooler system with the BESTfit Stainless Steel Heavy Duty T-Bolt Clamp, designed for sizes from 3.562 - 3.875 Inch up to 7 - 7.5 Inch. Made...
    PPR_202710
    SKU:
    PPR_202710
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Finish Options:
    Polished
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $8.54 - $31.20
    Qty in Cart: 0
    Price:
    $8.54 - $31.20
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    BESTfit Stainless Steel Lined Hose Clamp

    BESTfit Stainless Steel Lined Hose Clamp

    BESTFIT TRUCK PARTS

    $1.02 - $4.09
    Secure coolant and air system connections with the reliable BESTfit Stainless Steel Lined Hose Clamp 0.812?1.75 Inch. This high-quality aftermarket hose clamp is made from stainless steel and...
    PPR_202709
    SKU:
    PPR_202709
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $1.02 - $4.09
    Qty in Cart: 0
    Price:
    $1.02 - $4.09
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Stainless Steel Large Hose Clamp

    BESTfit Stainless Steel Large Hose Clamp

    BESTFIT TRUCK PARTS

    $17.17 - $21.13
    Refresh your setup with the Stainless Steel Large Hose Clamp, a reliable fastening solution designed for cooling, intake, and air systems. Made from corrosion?resistant stainless steel, this clamp...
    PPR_202708
    SKU:
    PPR_202708
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $17.17 - $21.13
    Qty in Cart: 0
    Price:
    $17.17 - $21.13
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    BESTfit Stainless Steel Constant Torque Coolant Hose Clamps

    BESTfit Stainless Steel Constant Torque Coolant Hose Clamps

    BESTFIT TRUCK PARTS

    $5.59 - $15.60
    Repair your truck's cooling system with the Stainless Steel Constant Torque Coolant Hose Clamp. This clamp is designed to maintain a consistent, uniform seal across a wide range of hose diameters,...
    PPR_201138
    SKU:
    PPR_201138
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Diameter Options:
    2 1/2 Inch
    Location:
    Made In USA
    Diameter Options:
    3 1/2 Inch
    Width Options:
    5/8 Inch
    Diameter Options:
    1 3/4 Inch
    Diameter Options:
    3 1/8 Inch
    Diameter Options:
    2 1/8 Inch
    Width Options:
    1/2 Inch
    $5.59 - $15.60
    Qty in Cart: 0
    Price:
    $5.59 - $15.60
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  • FREE SHIPPING OVER $249
    LF14000NN Fleetguard Oil Filter Cummins ISX

    LF14000NN Fleetguard Oil Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $69.99
    LF14000NN Fleetguard Oil Filter Cummins ISX* Fleetguard Oil Filter* For Cummins ISX Shorter Version Of LF9070FLG* Sold Individually* Warranty On Filter Oil Against Defects In Workmanship & Material...
    LF9080FLG
    SKU:
    LF9080FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $69.99
    Qty in Cart: 0
    Price:
    $69.99
    Subtotal:
  • FREE SHIPPING OVER $249
    LF9070 Fleetguard Spin-On Oil Filter Cummins ISX

    LF9070 Fleetguard Spin-On Oil Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $80.99
    LF9070 Fleetguard Spin-On Oil Filter Cummins ISX* Replaces OEM # LF9000FLG* Sold Individually* Warranty On Oil Filter Against Defects In Workmanship & Material From Date Of Purchase*** This Is An OEM...
    LF9070FLG
    SKU:
    LF9070FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $80.99
    Qty in Cart: 0
    Price:
    $80.99
    Subtotal:
  • FREE SHIPPING OVER $249
    LF9009 Fleetguard Oil Filter Cummins ISC - ISL

    LF9009 Fleetguard Oil Filter Cummins ISC - ISL

    OPP - ORIGINAL PARTS PROGRAM

    $60.99
    LF9009 Fleetguard Oil Filter Cummins ISC - ISL* High Quality Oil Filter Cummins * Sold Individually* Warranty On Oil Filter Cummins Against Defects In Workmanship & Material From Date Of Purchase*|**...
    LF9009FLG
    SKU:
    LF9009FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • FREE SHIPPING OVER $249
    LF777 Fleetguard By-Pass Spin-On Oil Filter

    LF777 Fleetguard By-Pass Spin-On Oil Filter

    OPP - ORIGINAL PARTS PROGRAM

    $31.07
    LF777 Fleetguard By-Pass Spin-On Oil Filter* High Quality Filter Oil* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    LF777FLG
    SKU:
    LF777FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $31.07
    Qty in Cart: 0
    Price:
    $31.07
    Subtotal:
  • FREE SHIPPING OVER $249
    CAT 3406 A-E - Fleetguard Oil Filter

    CAT 3406 A-E - Fleetguard Oil Filter

    OPP - ORIGINAL PARTS PROGRAM

    $30.88
    LF691A Fleetguard Spin-On Oil Filter CAT 3406 A-EThe Fleetguard Spin-On Oil Filter protects your engine with its sturdy and corrosion-resistant build. It can handle demanding conditions without any...
    LF691AFLG
    SKU:
    LF691AFLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $30.88
    Qty in Cart: 0
    Price:
    $30.88
    Subtotal:
  • FREE SHIPPING OVER $249
    LF3970 Fleetguard Oil Filter Cummins ISB

    LF3970 Fleetguard Oil Filter Cummins ISB

    OPP - ORIGINAL PARTS PROGRAM

    $18.66
    LF3970 Fleetguard Oil Filter Cummins ISB* High Quality Filter Oil* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    LF3970FLG
    SKU:
    LF3970FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $18.66
    Qty in Cart: 0
    Price:
    $18.66
    Subtotal:
  • FREE SHIPPING OVER $249
    Fleetguard Spin-On Oil Filter Full-Flow Replaces LF3620 For Detroit 60 Engines

    Fleetguard Spin-On Oil Filter Full-Flow Replaces LF3620 For Detroit 60 Engines

    OPP - ORIGINAL PARTS PROGRAM

    $23.72
    LF3620 Spin-On Oil FilterThis oil filter is for Detroit 60 engines. The LF3620 Fleetguard Full-Flow Spin-On Oil Filter features a lube filter and offers full-flow spin-on capabilities. It has a 9...
    LF3620FLG
    SKU:
    LF3620FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Diameter Options:
    4 3/4 Inch
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Length Options:
    9 3/4 Inch
    Style Options:
    Detroit
    $23.72
    Qty in Cart: 0
    Price:
    $23.72
    Subtotal:
  • FleetGuard LF3488 Oil Filter

    FleetGuard LF3488 Oil Filter

    OPP - ORIGINAL PARTS PROGRAM

    $29.17
    FleetGuard LF3488 Oil Filter* High Quality Oil Filter* FleetGuard * LF3488* Sold Individually* Warranty On Oil Filters Against Defects In Workmanship & Material From Date Of Purchase*|** This Is An...
    LF3488
    SKU:
    LF3488
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $29.17
    Qty in Cart: 0
    Price:
    $29.17
    Subtotal:
  • FS19932 Fleetguard Fuel & Water Separator Filter

    FS19932 Fleetguard Fuel & Water Separator Filter

    OPP - ORIGINAL PARTS PROGRAM

    $42.95
    FS19932 Fleetguard Fuel/Water Separator Filter* High Quality Filter* Fuel/Water Seperator* With Drain* Without Sensor Port* Replaces OE Numbers R71, R90P, S3226P, BF1346, P551767, P550747, PS7714,...
    FS19932FLG
    SKU:
    FS19932FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $42.95
    Qty in Cart: 0
    Price:
    $42.95
    Subtotal:
  • FREE SHIPPING OVER $249
    Spin-On Fuel/Water Separator FS1212

    Spin-On Fuel/Water Separator FS1212

    OPP - ORIGINAL PARTS PROGRAM

    $26.46
    Cummins Filtration Fuel/Water Separator* High Quality Separator Filter* Overall Height: 201.17MM (7.92 Inch)* Largest OD: 93.73MM (3.69 Inch)* Thread Size: 1-14 UNS-2B* Sold Individually* Warranty On...
    FS1212FLG
    SKU:
    FS1212FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $26.46
    Qty in Cart: 0
    Price:
    $26.46
    Subtotal:
  • FREE SHIPPING OVER $249
    FS1065 Fleetguard Fuel Filter/Water Separator Cummins ISL

    FS1065 Fleetguard Fuel Filter/Water Separator Cummins ISL

    OPP - ORIGINAL PARTS PROGRAM

    $48.77
    FS1065 Fleetguard Fuel Filter With Water Separator Cummins ISLThe filter has efficient filtration function, which can improve the fuel rate of the engine, protect your engine and prolong its service...
    FS1065FLG
    SKU:
    FS1065FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $48.77
    Qty in Cart: 0
    Price:
    $48.77
    Subtotal:
  • FREE SHIPPING OVER $249
    FS1040 Fuel Filter Cummins ISX

    FS1040 Fuel Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $59.99
    FS1040 Fuel Filter Cummins ISX* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...
    FS1040FLG
    SKU:
    FS1040FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • FREE SHIPPING OVER $249
    FF5686 Fleetguard Fuel Filter Cummins ISX

    FF5686 Fleetguard Fuel Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $103.99
    FF5686 Fleetguard Fuel Filter Cummins ISX* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    FF5686FLG
    SKU:
    FF5686FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $103.99
    Qty in Cart: 0
    Price:
    $103.99
    Subtotal:
  • FREE SHIPPING OVER $249
    FF5632 Fleetguard Fuel Filter Cummins ISB

    FF5632 Fleetguard Fuel Filter Cummins ISB

    OPP - ORIGINAL PARTS PROGRAM

    $33.40
    FF5632 Fleetguard Fuel Filter Cummins ISB* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filter Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    FF5632FLG
    SKU:
    FF5632FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $33.40
    Qty in Cart: 0
    Price:
    $33.40
    Subtotal:
  • FREE SHIPPING OVER $249
    Fleetguard Fuel Filter For FASS Fuel System FF5588

    Fleetguard Fuel Filter For FASS Fuel System FF5588

    FASS

    $44.30
    FF5588 Fleetguard Fuel Filter For FASS Fuel System* Physical Dimensions:  Largest OD - 3.75 Inch  Overall Height - 8 Inch  Thread Size - 1.5 -16 UN-2B* Sold Individually* Warranty On Fuel Filter...
    FF5588FLG
    SKU:
    FF5588FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $44.30
    Qty in Cart: 0
    Price:
    $44.30
    Subtotal:
  • Fuel Filter For CAT 3126 Engines

    Fuel Filter For CAT 3126 Engines

    OPP - ORIGINAL PARTS PROGRAM

    $27.33
    FF5324FLG Fuel Filter For Caterpillar 3126 Engines* High Quality Fuel Filter* FleetGaurd* Works With CAT 3126* Sold Individually* Warranty On Fuel Filters Against Defects In Workmanship & Material...
    FF5324FLG
    SKU:
    FF5324FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $27.33
    Qty in Cart: 0
    Price:
    $27.33
    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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