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Mack RD Truck Engine Parts & Cooling

Check out our top-notch Mack RD Truck engine parts and cooling system components. From reliable radiators to efficient charge coolers, we've got you covered. Find the perfect solutions to elevate your ride at 4 State Trucks!
  • Product
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  • Quantity
  • Price
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  • FREE SHIPPING OVER $249
    Clutch Brake Replaces SP127200, 127200X, 1091467

    Clutch Brake Replaces SP127200, 127200X, 1091467

    OPP - ORIGINAL PARTS PROGRAM

    $59.99
    2 Inch 2 Piece Style Clutch Brake* High Quality Clutch Brake* Sold Individually* Warranty On Clutch Brake Against Defects In Workmanship & Material From Date Of Purchase*** This Is An OEM Replacement...
    29-07050409
    SKU:
    29-07050409
    Truck Class:
    Heavy Duty
    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
    Clutch Brake Spicer Style 1 Piece

    Clutch Brake Spicer Style 1 Piece

    AFTERMARKET

    $47.46
    Clutch Brake Spicer Style 1 Piece* High Quality Clutch Brake * 1 Piece Torque Limiting* Sold Individually* Warranty On Clutch Brake Against Defects In Workmanship & Material From Date Of Purchase***...
    29-07050405
    SKU:
    29-07050405
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $47.46
    Qty in Cart: 0
    Price:
    $47.46
    Subtotal:
  • FREE SHIPPING OVER $249
    TPHD Pilot Bearing For Clutch

    TPHD Pilot Bearing For Clutch

    TPHD

    $33.25
    Pilot Bearing* High Quality Bearing* For Clutch* Fits Lipe & Spicer Clutches* Sold Individually* Warranty On Bearing Against Defects In Workmanship & Material From Date Of Purchase***High Quality...
    29-07050402
    SKU:
    29-07050402
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $33.25
    Qty in Cart: 0
    Price:
    $33.25
    Subtotal:
  • TPHD Fork Roller Type Clutch Release

    TPHD Fork Roller Type Clutch Release

    AFTERMARKET

    $78.99
    Clutch Release- Fork Roller Type By TPHDMaintain smooth clutch function and reduce drivetrain wear with the TPHD Fork Roller Type Clutch Release, a high-quality engine part for commercial trucks...
    29-07050006
    SKU:
    29-07050006
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • Clutch Pilot Bearing, 1.79 ID In., 2.833 OD In.

    Clutch Pilot Bearing, 1.79 ID In., 2.833 OD In.

    AUTOMANN USA

    $12.71
    1.79 ID In., 2.833 OD In. Clutch Pilot Bearing* High Quality Pilot Bearing* Dimensions: - I.D.- 1.79 Inch - O.D.- 2.833 Inch - Thickness- 0.75 Inch* Sold Individually* Warranty On Pilot Bearings...
    29-07050005
    SKU:
    29-07050005
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $12.71
    Qty in Cart: 0
    Price:
    $12.71
    Subtotal:
  • Clutch Pilot Bearing W/ Steel Shields, 1.80 ID In., 2.44 OD In.

    Clutch Pilot Bearing W/ Steel Shields, 1.80 ID In., 2.44 OD In.

    AUTOMANN USA

    $19.08
    1.80 ID In., 2.44 OD In. Clutch Pilot Bearings* High Quality Pilot Bearing* Dimensions:  - I.D.- 1.80 Inch - O.D.- 2.44 Inch - Thickness- 0.628 Inch* Sold Individually* Warranty On Pilot Bearings...
    29-07050004
    SKU:
    29-07050004
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $19.08
    Qty in Cart: 0
    Price:
    $19.08
    Subtotal:
  • On Sale
    Limited Quantity Available
    Clutch Pilot Bearing W/ Nitrile Shields, 1.80 ID In., 2.44 OD In.

    Clutch Pilot Bearing W/ Nitrile Shields, 1.80 ID In., 2.44 OD In.

    AUTOMANN USA

    Now: $8.71
    Was: $17.67
    1.80 ID In., 2.44 OD In. Clutch Pilot Bearings* High Quality Pilot Bearing* Dimensions: - I.D.- 1.80 Inch - O.D.- 2.44 Inch - Thickness- 0.628 Inch* Sold Individually* Warranty On Pilot Bearings...
    29-07050003
    SKU:
    29-07050003
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $8.71
    Was: $17.67
    Qty in Cart: 0
    Price:
    Now: $8.71
    Was: $17.67
    Subtotal:
  • Caterpillar Engine High Performance Stage 1 Turbocharger By Bully Dog

    Caterpillar Engine High Performance Stage 1 Turbocharger By Bully Dog

    BULLY DOG

    $2,000.00
    Bully Dog Turbocharger For CAT EnginesThis Bully Dog high performance stage 1 turbocharger that fits CAT engines gives a 40 horsepower increase and a 5 to 10 PSI boost increase. Bully Dog ensures...
    29-0704092
    SKU:
    29-0704092
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $2,000.00
    Qty in Cart: 0
    Price:
    $2,000.00
    Subtotal:
  • Heavy Duty Watchdog Multifunction Gauge Pack

    Heavy Duty Watchdog Multifunction Gauge Pack

    BULLY DOG

    $449.99
    Heavy Duty Watchdog Multifunction Gauge PackAre you looking for the perfect tool to help save money and improve driver behavior? 4 State Trucks offers this heavy duty Watchdog Multifunction Gauge...
    29-0704069
    SKU:
    29-0704069
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $449.99
    Qty in Cart: 0
    Price:
    $449.99
    Subtotal:
  • High Performance Turbocharger For Caterpillar C16, C15, 3406E Engines

    High Performance Turbocharger For Caterpillar C16, C15, 3406E Engines

    AFTERMARKET

    $2,467.99
    Performance Turbochargers Fits Caterpillar C16, C15, 3406E EnginesThis aftermarket CAT High Performance Turbocharger fits most C16, C15, & 3406E applications. Equipped with charge air cooler, quick...
    29-0704016
    SKU:
    29-0704016
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Type Options:
    Bolt Mount
    $2,467.99
    Qty in Cart: 0
    Price:
    $2,467.99
    Subtotal:
  • Mahle Crankshaft Replaces 2475146, 6I1453 For CAT 3406, 3406E Engine

    Mahle Crankshaft Replaces 2475146, 6I1453 For CAT 3406, 3406E Engine

    AUTOMANN USA

    $7,002.99
    Mahle Crankshaft Fits CAT 3406 & 3406E Engine* High Quality Mahle Crankshaft * Cat 3406 And 3406E* Sold Individually** Warranty On Mahle Crankshaft Against Defects In Workmanship & Material From Date...
    29-070400050
    SKU:
    29-070400050
    Truck Class:
    Heavy Duty
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $7,002.99
    Qty in Cart: 0
    Price:
    $7,002.99
    Subtotal:
  • Cummins N14 Turbocharger OE Replacement 09-0704043

    Cummins N14 Turbocharger OE Replacement 09-0704043

    AREA DIESEL SERVICE

    $1,275.99
    Turbocharger Fits N14 Cummins Engine* High Quality Turbocharger* Works With Cummins N14 Engines* Sold Individually* Warranty On Turbocharger Against Defects In Workmanship & Material From Date Of...
    29-070400040
    SKU:
    29-070400040
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $1,275.99
    Qty in Cart: 0
    Price:
    $1,275.99
    Subtotal:
  • Mounting Package For Fuel Pump W/ 290 GPH Flow Ratings

    Mounting Package For Fuel Pump W/ 290 GPH Flow Ratings

    FASS

    $77.99
    Mounting Package For Fuel Pump W/ 290 GPH Flow Ratings* High Quality Mounting Package* For Fuel Pumps With 290 Gallons Per Hour Flow Rating* Made In The USA* Sold Individually* Warranty On Mounting...
    29-070300007
    SKU:
    29-070300007
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $77.99
    Qty in Cart: 0
    Price:
    $77.99
    Subtotal:
  • FASS Industrial Series Diesel 290 GPH Fuel System For Class 8 UIM Engines

    FASS Industrial Series Diesel 290 GPH Fuel System For Class 8 UIM Engines

    FASS

    $955.99
    290 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* 290 Gallons...
    29-070300005
    SKU:
    29-070300005
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $955.99
    Qty in Cart: 0
    Price:
    $955.99
    Subtotal:
  • FASS Industrial Series Diesel 250 GPH Fuel System For Class 8 UIM Engines

    FASS Industrial Series Diesel 250 GPH Fuel System For Class 8 UIM Engines

    FASS

    $903.99
    250 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* 250 Gallons...
    29-070300004
    SKU:
    29-070300004
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $903.99
    Qty in Cart: 0
    Price:
    $903.99
    Subtotal:
  • FASS Industrial Series Diesel 165 GPH Fuel System For Class 8 UIM Engines

    FASS Industrial Series Diesel 165 GPH Fuel System For Class 8 UIM Engines

    FASS

    $831.99
    165 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* 165 Gallons...
    29-070300003
    SKU:
    29-070300003
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $831.99
    Qty in Cart: 0
    Price:
    $831.99
    Subtotal:
  • FASS Industrial Series Diesel 100 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 100 GPH Fuel System, Class 8

    FASS

    $817.99
    100 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* 100 Gallons Per Hour Flow Rating*...
    29-070300002
    SKU:
    29-070300002
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $817.99
    Qty in Cart: 0
    Price:
    $817.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Large Style Radiator Cap 10 Pound Pressure

    Large Style Radiator Cap 10 Pound Pressure

    PARTS DISTRIBUTING

    $20.38
    Radiator Cap 10 Pound Pressure Large Style* High Quality Radiator Cap* Large Style* 10 Pounds* Sold Individually* Warranty On Radiator Cap Against Defects In Workmanship & Material From Date Of...
    29-070230
    SKU:
    29-070230
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $20.38
    Qty in Cart: 0
    Price:
    $20.38
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    Small Style Radiator Cap W/ 10 Pound Pressure Rating

    Small Style Radiator Cap W/ 10 Pound Pressure Rating

    OPP - ORIGINAL PARTS PROGRAM

    Now: $8.67
    Was: $12.39
    Radiator Cap W/ 10 Pound Pressure Rating Small Style* High Quality Radiator Cap* Small Style* 10 Pounds* Sold Individually* Warranty On Radiator Cap Against Defects In Workmanship & Material From...
    29-070228
    SKU:
    29-070228
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $8.67
    Was: $12.39
    Qty in Cart: 0
    Price:
    Now: $8.67
    Was: $12.39
    Subtotal:
  • Blue Oiler Cap Replacement Plug For Dual Dynamics

    Blue Oiler Cap Replacement Plug For Dual Dynamics

    DUAL DYNAMICS

    $6.56
    Replacement Oil Cap Plug For Dual Dynamics - Blue* High Quality Oil Cap Plug* Blue* For 302PC Dual Dynamics* Sold Individually* Warranty On Oil Cap Plug Against Defects In Workmanship & Material From...
    29-050926
    SKU:
    29-050926
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $6.56
    Qty in Cart: 0
    Price:
    $6.56
    Subtotal:
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Frequently Asked Questions About Mack RD Truck Engine Parts & Cooling

What types of components are included in this category?

This category covers engine and cooling system parts for Mack RD model trucks, including items such as radiators, radiator hoses, water pumps, fan clutches, cooling fans, thermostats, oil coolers, and related gaskets and mounting hardware. These parts work together to keep the engine running at a safe operating temperature and support proper engine function.

How do I know a part will fit my specific Mack RD truck?

Mack RD trucks were built over several years with different engine configurations, so fitment can vary by model year and engine type. Before ordering, check your truck's VIN and engine model against the part's listed specifications, or reach out to our parts team with your truck's details so we can confirm compatibility before you buy.

What are common signs that a cooling system part needs to be replaced?

Watch for symptoms like the engine running hotter than normal, coolant leaks under the truck, a fan clutch that stays engaged or never engages, low coolant levels without an obvious leak, or visible corrosion and cracking on hoses and radiator seams. Catching these issues early can help prevent more serious engine damage.

Should I choose OEM or aftermarket parts for my Mack RD engine?

Both OEM and quality aftermarket cooling and engine parts can be reliable choices, and the right option often depends on your budget, availability, and how the truck is used. We carry a mix of OEM and aftermarket options so you can compare fit, materials, and price to find the part that best suits your needs.

Do I need professional installation for engine and cooling parts?

Some parts, like hoses, thermostats, or belts, are straightforward enough for an experienced DIY mechanic with the right tools. Others, such as water pumps, fan clutches, or radiators, may involve draining coolant, disconnecting engine components, or working near pressurized systems, so many owners choose to have these installed by a qualified diesel technician to ensure proper sealing and function.


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