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Kenworth Engine Parts & Cooling

Optimize your truck's operation with exceptional Kenworth engine cooling parts from 4 State Trucks. Browse through our selection of Radiators, Charge Air Coolers, Fan Shrouds, Filters, and Transmission Coolers to address all your truck's needs. Rely on 4 State Trucks for premium products that ensure your truck runs smoothly and efficiently.
  • Product
  • Qty in Cart
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  • Price
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  • Poly- V Non-Ribbed Serpentine Belt Replaces 4080775X

    Poly- V Non-Ribbed Serpentine Belt Replaces 4080775X

    AFTERMARKET

    $73.99
    Poly- V Serpentine Belt Replaces 4080775X, K080776Hd* High Quality Serpentine Belt* Black* Sold Individually* Warranty On Serpentine Belts Against Defects In Workmanship & Material From Date Of...
    29-07060086
    SKU:
    29-07060086
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $73.99
    Qty in Cart: 0
    Price:
    $73.99
    Subtotal:
  • 77.20 Inch Poly- V Ribbed Serpentine Belt Replaces 4080772X

    77.20 Inch Poly- V Ribbed Serpentine Belt Replaces 4080772X

    AFTERMARKET

    $73.99
    77.20 Inch Poly- V Serpentine Belt Replaces 4080772X* High Quality Serpentine Belt* 77.20 Inch Effective Length* Number Of Ribs: 8* Sold Individually* Warranty On Serpentine Belts Against Defects In...
    29-07060085
    SKU:
    29-07060085
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    International
    Make:
    Kenworth
    Product Type:
    Engine Parts
    $73.99
    Qty in Cart: 0
    Price:
    $73.99
    Subtotal:
  • Turbocharger For Cummins NTC315, 240

    Turbocharger For Cummins NTC315, 240

    AREA DIESEL SERVICE

    $1,310.99
    TurboCharger Replaces 40333326H 3029514 3522865 196441* High Quality Turbocharger* No Core Needed* Made In USA* Sold Individually* Warranty On Turbochargers Against Defects In Workmanship & Material...
    29-0704126
    SKU:
    29-0704126
    Location:
    Made In USA
    Material Options:
    Cast Iron
    Style Options:
    Cummins
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,310.99
    Qty in Cart: 0
    Price:
    $1,310.99
    Subtotal:
  • S480 Non-Wastegated Turbocharger For Caterpillar C15 C16 3406E

    S480 Non-Wastegated Turbocharger For Caterpillar C15 C16 3406E

    AREA DIESEL SERVICE

    $3,026.99
    S480 Big CAT BorgWarner Non-Wastegated TurbochargerThe S480 Big Cat non-wastegated turbo is designed for applications with 750-850 horsepower. It features a 1.58 A/R housing, a forged milled...
    29-0704110
    SKU:
    29-0704110
    Material Options:
    Cast Iron
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $3,026.99
    Qty in Cart: 0
    Price:
    $3,026.99
    Subtotal:
  • Holson Turbo Replaces OE P3804502 For Cummins N14

    Holson Turbo Replaces OE P3804502 For Cummins N14

    AREA DIESEL SERVICE

    $2,136.99
    Direct Replacement Holson Turbow Fits Cummins N14* High Quality Turbocharger* Cast Iron* External Wastegate* Center Housing Cooling Type: Oil* Aluminum Compressor Housing * Mounting Bracket (Not...
    29-0704107
    SKU:
    29-0704107
    Style Options:
    Cummins
    Truck Class:
    Heavy Duty
    Material Options:
    Cast Iron
    Make:
    GMC
    Make:
    Ford
    Make:
    Peterbilt
    Make:
    Kenworth
    Make:
    Volvo
    Make:
    International
    Make:
    Sterling
    Make:
    Freightliner
    Make:
    Mack
    Product Type:
    Engine Parts
    $2,136.99
    Qty in Cart: 0
    Price:
    $2,136.99
    Subtotal:
  • Turbo Housing S400SX4 For CAT 3406E

    Turbo Housing S400SX4 For CAT 3406E

    AREA DIESEL SERVICE

    $469.99
    T6 1.58 A/R Twin Scroll Turbine Housing* High Quality Turbo Housing* Cast Iron* 1.58 A/R Turbine Housing* Twin Scroll 5.75 Inch V-Band Outlet* Sold Individually* Warranty On Turbo Housings Against...
    09-0704047
    SKU:
    09-0704047
    Truck Class:
    Universal
    Material Options:
    Cast Iron
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $469.99
    Qty in Cart: 0
    Price:
    $469.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    S410SX Turbo 80MM Super Core For Caterpillar Engines

    S410SX Turbo 80MM Super Core For Caterpillar Engines

    AREA DIESEL SERVICE

    Now: $1,379.05
    Was: $1,948.99
    Super Core Turbo AssemblyThis turbo is designed for single-turbo Caterpillar engines, including C15 Acert, C15, 3406, MBN, 6NZ, 5EK, SDP, MXS, BXS, and NSX models. Please note, a turbine housing is...
    09-0704046
    SKU:
    09-0704046
    Material Options:
    Cast Iron
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $1,379.05
    Was: $1,948.99
    Qty in Cart: 0
    Price:
    Now: $1,379.05
    Was: $1,948.99
    Subtotal:
  • Isspro Ungrounded Thermocouple W/ 2.25 Inch Probe For Pyrometer Sender

    Isspro Ungrounded Thermocouple W/ 2.25 Inch Probe For Pyrometer Sender

    ISSPRO

    $70.99
    Ungrounded Thermocouple With 2.25 Inch ProbeInstall new gauges in your truck using the ISSPRO Ungrounded Thermocouple. Enthusiasts around the world trust Isspro gauges, sensors, and sending units to...
    29-0710004
    SKU:
    29-0710004
    Truck Class:
    Heavy Duty
    Make:
    GMC
    Make:
    Peterbilt
    Make:
    Freightliner
    Make:
    Mack
    Make:
    International
    Make:
    Volvo
    Make:
    Ford
    Make:
    Kenworth
    Make:
    Western Star
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $70.99
    Qty in Cart: 0
    Price:
    $70.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    Fixed A/C Blue Orifice Tube For Ford, Sterling

    Fixed A/C Blue Orifice Tube For Ford, Sterling

    BESTFIT TRUCK PARTS

    Now: $1.24
    Was: $1.77
    Air Conditioner Orifice Tube for Automotive ReplacementOur BESTfit valves provide the same high-quality, reliable, and durable performance as factory parts. They effectively restore A/C performance...
    09-070013
    SKU:
    09-070013
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $1.24
    Was: $1.77
    Qty in Cart: 0
    Price:
    Now: $1.24
    Was: $1.77
    Subtotal:
  • Water Pump W/ Dome Drive Gear & Straight Teeth For CAT C15 Engine

    Water Pump W/ Dome Drive Gear & Straight Teeth For CAT C15 Engine

    AKMI

    $433.99
    Dome Drive Gear Water Pump Replaces 1610969, 1608227, 10R0484, 0R9869, 605-7481, 352-0211Maintain optimal engine cooling with the Water Pump with Dome Drive Gear and Straight Teeth for CAT C15...
    29-07120054
    SKU:
    29-07120054
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Engine Parts
    $433.99
    Qty in Cart: 0
    Price:
    $433.99
    Subtotal:
  • SS Peanut Cover Plate W/ Gasket Replaces 146-2601 For CAT 3406E

    SS Peanut Cover Plate W/ Gasket Replaces 146-2601 For CAT 3406E

    BESTFIT TRUCK PARTS

    $273.99
    Mirror Finish Stainless Steel Peanut Cover Plate And GasketDesigned to fit seamlessly onto the Cat 3406E and C15 ACERT engines, this cover plate is easy to install. It is constructed from high-grade...
    29-0704127
    SKU:
    29-0704127
    Material Options:
    Stainless Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Finish Options:
    Mirror
    $273.99
    Qty in Cart: 0
    Price:
    $273.99
    Subtotal:
  • 5.5 ID x 6 Inch Rubber Straight Hump Coupler For Intake Piping

    5.5 ID x 6 Inch Rubber Straight Hump Coupler For Intake Piping

    AFTERMARKET

    $42.53
    5 1/2 Inch ID Black Rubber Hump Style Straight Coupler WithCreate a smooth transition between two sections of intake piping with this rubber straight hump hose coupler. Designed for optimal airflow...
    29-070100003
    SKU:
    29-070100003
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Diameter Options:
    5 1/2 Inch
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $42.53
    Qty in Cart: 0
    Price:
    $42.53
    Subtotal:
  • 1 Piece Exhaust Manifold Replaces 4P5008, 1005693 For 3406E And Early C15 Caterpillar

    1 Piece Exhaust Manifold Replaces 4P5008, 1005693 For 3406E And Early C15 Caterpillar

    AKMI

    $551.99
    Exhaust Manifold W/ Center & End Section For Cat 3406E & Early C15 Engines* High Quality Exhaust Manifold * 1 Piece Design * Fits Caterpillar 3406 E and Caterpillar Early C15* Includes: Manifold...
    29-07120053
    SKU:
    29-07120053
    Truck Class:
    Heavy Duty
    Material Options:
    Cast Iron
    Make:
    International
    Make:
    Kenworth
    Make:
    Western Star
    Make:
    Peterbilt
    Make:
    Freightliner
    Make:
    Volvo
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $551.99
    Qty in Cart: 0
    Price:
    $551.99
    Subtotal:
  • Throttle Cable, Length Option

    Throttle Cable, Length Option

    BUYERS PRODUCTS

    $43.14 - $53.99
    The Throttle Cable Length Option provides adjustable heavy?duty control cables in different lengths - typically 6?feet or 10?feet - for throttle, PTO, dump body and other control linkages on a wide...
    PPR_201389
    SKU:
    PPR_201389
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $43.14 - $53.99
    Qty in Cart: 0
    Price:
    $43.14 - $53.99
    Subtotal:
  • BESTfit Steel Front Sump Oil Pan For Cummins X15 Engines - Replaces 5647538

    BESTfit Steel Front Sump Oil Pan For Cummins X15 Engines - Replaces 5647538

    BESTFIT TRUCK PARTS

    $644.99
    BESTfit Oil Pan W/ Front Sump - Replaces 4386821* High Quality Steel Oil Pan* Front Sump* Fits Cummins X15 2016-Current* Sold Individually* Warranty On Oil Pans Against Defects In Workmanship &...
    29-07200020
    SKU:
    29-07200020
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    $644.99
    Qty in Cart: 0
    Price:
    $644.99
    Subtotal:
  • BESTfit Damper Replaces 8929294, 8929502 For 11.1L, 12.7L, 14.0L Detroit Diesel Series 60 Engines

    BESTfit Damper Replaces 8929294, 8929502 For 11.1L, 12.7L, 14.0L Detroit Diesel Series 60 Engines

    BESTFIT TRUCK PARTS

    $610.99
    BESTfit Damper* High Quality Damper* Sold Individually* Warranty On Dampers Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement Part (Not OEM)****...
    29-07040027
    SKU:
    29-07040027
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Product Type:
    Engine Parts
    $610.99
    Qty in Cart: 0
    Price:
    $610.99
    Subtotal:
  • BESTfit Cummins ISC, ISL Flywheel 3909908

    BESTfit Cummins ISC, ISL Flywheel 3909908

    BESTFIT TRUCK PARTS

    $520.99
    BESTfit Flywheel* High Quality Flywheel* 158 Teeth Count * Uses Ring Gear* Sold Individually* Warranty On Flywheels Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    29-07040029
    SKU:
    29-07040029
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Product Type:
    Engine Parts
    $520.99
    Qty in Cart: 0
    Price:
    $520.99
    Subtotal:
  • BESTfit Damper Replaces 3073587 For Cummins ISM, M1 Engines

    BESTfit Damper Replaces 3073587 For Cummins ISM, M1 Engines

    BESTFIT TRUCK PARTS

    $488.99
    BESTfit Damper* High Quality Damper* Sold Individually* Warranty On Dampers Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement Part (Not OEM)****...
    29-07040028
    SKU:
    29-07040028
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $488.99
    Qty in Cart: 0
    Price:
    $488.99
    Subtotal:
  • BESTfit Exhaust Manifold Replaces 3931440 For Cummins C Series Engines

    BESTfit Exhaust Manifold Replaces 3931440 For Cummins C Series Engines

    BESTFIT TRUCK PARTS

    $245.99
    BESTfit Exhaust Manifold* High Quality Exhaust Manifold* Turbo Exhaust Position LMFO* Made Of Iron* Sold Individually* Warranty On Exhaust Manifolds Against Defects In Workmanship & Material From...
    29-07120050
    SKU:
    29-07120050
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Product Type:
    Engine Parts
    $245.99
    Qty in Cart: 0
    Price:
    $245.99
    Subtotal:
  • BESTfit Cummins ISC, ISL Flywheel Replaces 3282171

    BESTfit Cummins ISC, ISL Flywheel Replaces 3282171

    BESTFIT TRUCK PARTS

    $798.99
    BESTfit Flywheel* High Quality Flywheel* 138 Teeth Count* Uses A Ring Gear* Sold Individually* Warranty On Flywheels Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    29-07040023
    SKU:
    29-07040023
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Material Options:
    Billet Aluminum
    Product Type:
    Engine Parts
    $798.99
    Qty in Cart: 0
    Price:
    $798.99
    Subtotal:
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Adding your products to cart

When you're running a Kenworth, engine performance and cooling reliability are everything. That’s why our aftermarket Kenworth engine parts and cooling components are built for the long haul. Whether you're driving a W900, T680, or T800, this product lineup is designed to keep your engine temps in check and your rig on the road.

Upgrade Performance with Engine Cooling Components

From steep grades to long idle times, your Kenworth engine works hard—and heat builds fast. Our heavy-duty parts help you control that heat, extend yourKenworth engine lifecycle, and avoid costly downtime. If you’re upgrading, you can also ensure that your Kenworth exhaust flow is stronger and more stable.

Find Replacement Engine Parts

- Radiators & Condensers: High-efficiency designs that boost cooling and resist clogging. - Charge Air Coolers: Improve air density for better combustion and fuel economy. - Coolant Tubes & Reservoirs: Direct-fit, corrosion-resistant designs for leak-free performance. - Heater Cores & Blower Motors: Keep your cab warm and defrost working in the winter. - A/C Compressors & Expansion Valves: Restore your climate control and beat the summer heat.

Why Buy Aftermarket?

- Tough Materials: Many parts built from stainless steel, copper, or aluminum for long-lasting durability. - Direct Fit for Kenworth Models: Save time on installation with components made to match OEM specs. - Lower Cost, Same (or Better) Performance: Get more value without sacrificing reliability.
Whether you're chasing down a coolant leak, upgrading your CAC, or just trying to stay comfortable in the cab, we’ve got the Kenworth engine and cooling parts to get the job done right.

Frequently Asked Questions About Kenworth Engine Parts & Cooling

What coolant type should I use for my Kenworth engine, and how often should I change it?

Most modern Kenworth engines require extended life coolant (ELC) that meets OEM specifications, typically a nitrite-free, ethylene glycol-based formula. For Paccar MX engines (2011 and newer), use Paccar Premium coolant or equivalent meeting ES Compleat OAT specifications. For Cummins ISX engines, use Fleetguard ES Compleat or equivalent. Change intervals vary: ELC coolants typically last 600,000 miles or 6 years with proper maintenance and additive testing at 300,000 miles. Always verify your specific engine requirements in your owner's manual, as using incorrect coolant can cause severe engine damage.

How do I know if my radiator fits my specific Kenworth model and engine configuration?

Radiator compatibility depends on three key factors: your truck model (T680, T880, W900, etc.), engine type (Paccar MX-13, Cummins ISX15, Cat C15), and model year. Critical measurements include core size (typically ranging from 42" to 48" wide), inlet/outlet locations, and mounting bracket positions. Check your OEM-specific build sheet or the radiator part number tag (usually located on the top tank) to ensure exact fitment. Common mismatches occur with pre-2008 versus post-2008 models due to emissions equipment changes that altered cooling requirements.

What are the warning signs that my water pump needs replacement?

Key indicators include coolant leaks from the weep hole (small hole at bottom of pump), excessive play in the pump shaft when wiggled by hand, grinding or growling noises from the pump area, engine overheating despite proper coolant levels, and coolant in the oil (indicating seal failure). Most Kenworth water pumps last 400,000-500,000 miles under normal conditions. Early failure often results from contaminated coolant, improper belt tension, or running the engine hot. Replace the thermostat and flush the cooling system when installing a new pump to prevent premature failure.

Can I upgrade my stock cooling system for heavy-haul or high-temperature operations?

Yes, several upgrades can improve cooling capacity for demanding applications. Consider installing a heavy-duty aluminum radiator with increased core thickness (upgrading from 2-row to 4-row), adding an auxiliary transmission cooler, upgrading to a high-flow water pump, or installing a fan clutch with higher engagement temperature settings. For extreme conditions, charge air cooler upgrades and larger capacity surge tanks also help. Ensure any upgrades match your engine's flow requirements - excessive cooling capacity can cause incomplete combustion and increased emissions in modern engines.

Why do thermostats fail frequently, and which temperature rating should I use?

Thermostat failure typically results from coolant contamination, scale buildup, or using incorrect coolant mixtures that corrode the thermostat spring and seal. Standard temperature ratings are 180?F for older mechanical engines and 185-190?F for modern emissions-compliant engines. Never run without a thermostat as this prevents proper engine warm-up, reduces fuel efficiency, and can trigger fault codes. High-quality thermostats include jiggle pins for air bleeding and stainless steel construction for longevity. Replace every 200,000-300,000 miles as preventive maintenance, or whenever cooling system major service is performed.


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Text Us: 888-875-7787
Wholesale: 855-220-8608

Fax: 417-624-2489

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4 STATE TRUCKS

4579 Highway 43

Joplin, MO 64804

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