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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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  • FREE SHIPPING OVER $249
    FF2203 Fleetguard Fuel Filter Cummins ISX

    FF2203 Fleetguard Fuel Filter Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $40.85
    FF2203 Fleetguard Fuel Filter Cummins ISX* High Quality Fuel Filter* Alternate Fuel/Water Separator With Drain FS1023* Replaces OEM # 4010476* Sold Individually* Warranty On Fuel Filters Against...
    FF2203FLG
    SKU:
    FF2203FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $40.85
    Qty in Cart: 0
    Price:
    $40.85
    Subtotal:
  • FREE SHIPPING OVER $249
    FF2200FLG Cummins ISX Fuel Filter

    FF2200FLG Cummins ISX Fuel Filter

    OPP - ORIGINAL PARTS PROGRAM

    $32.90
    Fleetguard Filter-Fuel ID: FF2200* High Quality Fuel Filter* Sold Individually* Warranty On Fuel Filters Against Defects In Workmanship & Material From Date Of Purchase*** This Is An OEM Replacement...
    FF2200FLG
    SKU:
    FF2200FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $32.90
    Qty in Cart: 0
    Price:
    $32.90
    Subtotal:
  • FREE SHIPPING OVER $249
    FF105FLG Cummins Short Fuel Filter

    FF105FLG Cummins Short Fuel Filter

    OPP - ORIGINAL PARTS PROGRAM

    $14.33
    FF105 Cummins Short Fuel FilterDealing with fuel issues? The Fleetguard Cummins FF105 spin-on filter can help. Compatible with Cummins 154709, it efficiently filters out impurities, ensuring your...
    FF105FLG
    SKU:
    FF105FLG
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $14.33
    Qty in Cart: 0
    Price:
    $14.33
    Subtotal:
  • FREE SHIPPING OVER $249
    Filter Fuel Water Separator Replaces Donaldson P557004 For MX Paccar Engines

    Filter Fuel Water Separator Replaces Donaldson P557004 For MX Paccar Engines

    OPP - ORIGINAL PARTS PROGRAM

    $64.99
    Donaldson Fuel Filter and Water Separator CartridgeThe Fuel Filter and Water Separator removes contaminants and water from the fuel system.* High Quality Fuel Water Separator Filter* P557004...
    DNP557004
    SKU:
    DNP557004
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $64.99
    Qty in Cart: 0
    Price:
    $64.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Filter Fuel Water Separator Donaldson P55 - 1000

    Filter Fuel Water Separator Donaldson P55 - 1000

    OPP - ORIGINAL PARTS PROGRAM

    $30.82
    Donaldson Spin-On Fuel Filter and Water Separator* High Quality Fuel Water Separator Filter* P551000 Donaldson Fuel Filter To Replace FS1000FLG* Thread: 1-14 UNF* Micron Rating: 10* Sold...
    DNP551000
    SKU:
    DNP551000
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $30.82
    Qty in Cart: 0
    Price:
    $30.82
    Subtotal:
  • 10 Micron Fuel Water Separator Filter

    10 Micron Fuel Water Separator Filter

    OPP - ORIGINAL PARTS PROGRAM

    $42.04
    Donaldson 10 Micron Fuel Water Separator FilterRemove contaminates and water from your fuel system with this Donaldson fuel filter and water separator cartridge. It separates water in the fuel system...
    DNP550849
    SKU:
    DNP550849
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $42.04
    Qty in Cart: 0
    Price:
    $42.04
    Subtotal:
  • FREE SHIPPING OVER $249
    Engine Crankcase Filter Breather Element CV50634 For Cummins ISX

    Engine Crankcase Filter Breather Element CV50634 For Cummins ISX

    OPP - ORIGINAL PARTS PROGRAM

    $106.99
    Crankcase Ventilation Filter Fits Cummins ISX* High Quality Crankcase Ventilation Filter * Fits 2010 And Newer ISX/ISM Engines * Sold Individually* Warranty On Crankcase Ventilation Filters Against...
    CV50634FLG
    SKU:
    CV50634FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $106.99
    Qty in Cart: 0
    Price:
    $106.99
    Subtotal:
  • FREE SHIPPING
    Engine Crankcase Filter Breather Element CV50633 For Cummins ISX & ISM

    Engine Crankcase Filter Breather Element CV50633 For Cummins ISX & ISM

    OPP - ORIGINAL PARTS PROGRAM

    $297.99
    Crankcase Ventilation Filter Fits Cummins ISX & ISM* High Quality Crankcase Ventilation Filter* Fits 2009 And Older ISX/ISM Engines * Sold Individually* Warranty On Crankcase Ventilation Filters...
    CV50633FLG
    SKU:
    CV50633FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $297.99
    Qty in Cart: 0
    Price:
    $297.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Engine Crankcase Filter Breather Element CV50628 For Cummins ISC & ISL

    Engine Crankcase Filter Breather Element CV50628 For Cummins ISC & ISL

    OPP - ORIGINAL PARTS PROGRAM

    $129.99
    Crankcase Ventilation Filter Fits Cummins ISC & ISLThe crankcase filter performs the extremely important function of equalizing the pressure in the crankcase during different operational phases of...
    CV50628FLG
    SKU:
    CV50628FLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $129.99
    Qty in Cart: 0
    Price:
    $129.99
    Subtotal:
  • FREE SHIPPING OVER $249
    FleetGuard Air Filter 13.5 X 16 Inch

    FleetGuard Air Filter 13.5 X 16 Inch

    OPP - ORIGINAL PARTS PROGRAM

    $84.99
    Air Filter AF25139MFLG* High Quality Air Filter * 13.5 Inch x 16 Inch* Sold Individually* Warranty On Air Filter Against Defects In Workmanship & Material From Date Of Purchase*|** This Is An OEM...
    AF25139MFLG
    SKU:
    AF25139MFLG
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $84.99
    Qty in Cart: 0
    Price:
    $84.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Rotella 15W40 Motor Oil 1 Gallon

    Rotella 15W40 Motor Oil 1 Gallon

    AFTERMARKET

    $22.43
    Rotella 15W40 Motor OilIn the market for motor oil to service your truck? 4 State Trucks offers Rotella T 15W40 multi grade heavy duty motor oil in one gallon containers and available with a one year...
    56026
    SKU:
    56026
    Truck Class:
    Universal
    Capacity:
    1 Gallon
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $22.43
    Qty in Cart: 0
    Price:
    $22.43
    Subtotal:
  • FREE SHIPPING OVER $249
    7 Inch To 6 Inch 45 Degree Rubber Reducer Elbow

    7 Inch To 6 Inch 45 Degree Rubber Reducer Elbow

    AUTOMANN USA

    $116.99
    45 Degree 7 To 6 Inch Rubber Reducer ElbowEnsure your truck's air or fluid system operates flawlessly with this 7 Inch to 6 Inch 45 Degree Rubber Reducer Elbow, precision-engineered from high-quality...
    29-090500076
    SKU:
    29-090500076
    Truck Class:
    Heavy Duty
    Product Type:
    Engine Parts
    Degree Options:
    45
    Diameter Options:
    7 Inch
    Style Options:
    Elbow
    Make:
    Universal Items
    $116.99
    Qty in Cart: 0
    Price:
    $116.99
    Subtotal:
  • BESTfit Cummins 5.9 L Flywheel 3921264, 3901395, 3900269

    BESTfit Cummins 5.9 L Flywheel 3921264, 3901395, 3900269

    BESTFIT TRUCK PARTS

    $257.99
    BESTfit Cummins Flywheels B Series - 5.9L SAE #2* High Quality Flywheel* Fits Cummins Flywheels B Series - 5.9L* Flat Design* 8 Bolt Mounting Holes* Size: SAE #2 * 14 Inch Clutch Size* 17 Inch OD...
    29-0733921263
    SKU:
    29-0733921263
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Style Options:
    Flat
    Diameter Options:
    17 Inch
    $257.99
    Qty in Cart: 0
    Price:
    $257.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit EZ Oil Drain Valve 1 Inch-18 UNF

    BESTfit EZ Oil Drain Valve 1 Inch-18 UNF

    BESTFIT TRUCK PARTS

    $58.99
    BESTfit EZ Oil Drain Valve For Cummins & Paccar MX-13 Engines Through 2011Changing your oil is made easier with the EZ Oil Drain Valve. Unlike spring-assisted gate valves, EZ Oil's ball valve design...
    29-072002
    SKU:
    29-072002
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Ready To Ship:
    Yes
    $58.99
    Qty in Cart: 0
    Price:
    $58.99
    Subtotal:
  • 36 Quart Steel Front Sump Engine Oil Pan Replaces 3046947 For Cummins

    36 Quart Steel Front Sump Engine Oil Pan Replaces 3046947 For Cummins

    AUTOMANN USA

    $392.99
    Front Sump Engine Oil Pan For Cummins- 36 QuartThis heavy-duty oil pan provides a precise fit and dependable performance for demanding use. Constructed for strength and durability, it features a deep...
    29-072000010
    SKU:
    29-072000010
    Truck Class:
    Heavy Duty
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Width Options:
    15 1/2 Inch
    Color:
    Black
    Length Options:
    47 Inch
    Make:
    Universal Items
    $392.99
    Qty in Cart: 0
    Price:
    $392.99
    Subtotal:
  • Isspro Fuel & Oil Sender W/ 1/8 Inch Thread Single Stud

    Isspro Fuel & Oil Sender W/ 1/8 Inch Thread Single Stud

    ISSPRO

    $48.77
    Fuel Oil SenderAt 4 State Trucks we offer aftermarket Isspro fuel/oil senders for your big rig that comes with a warranty against defects in materials and workmanship. Isspro is a trusted brand for...
    29-071009
    SKU:
    29-071009
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $48.77
    Qty in Cart: 0
    Price:
    $48.77
    Subtotal:
  • Isspro Temperature Sender with Bushings 280F

    Isspro Temperature Sender with Bushings 280F

    ISSPRO

    $77.99
    Sending UnitWe offer top of the line aftermarket Isspro sender units for your big rig. This sending unit is accurate in measuring the amount of fuel in the fuel tank and communicates the fuel level...
    29-071008
    SKU:
    29-071008
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $77.99
    Qty in Cart: 0
    Price:
    $77.99
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    Isspro Generator Drive Tip Male .203 Tang

    Isspro Generator Drive Tip Male .203 Tang

    ISSPRO

    Now: $4.36
    Was: $15.51
    Signal Generator Drive TipAt 4 State Trucks we offer aftermarket Isspro drive tips for signal generators. This drive tip features a .203 tang and comes with a warranty against defects in materials...
    29-071006
    SKU:
    29-071006
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $4.36
    Was: $15.51
    Qty in Cart: 0
    Price:
    Now: $4.36
    Was: $15.51
    Subtotal:
  • Isspro Oil Temperature Sender 320F 1/8 Inch NPTF

    Isspro Oil Temperature Sender 320F 1/8 Inch NPTF

    ISSPRO

    $26.08
    Oil Temperature SenderEnsure accurate readings with this high quality Isspro oil temperature sender. It is sold individually and is backed with a warranty against defects in materials and workmanship...
    29-071001
    SKU:
    29-071001
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $26.08
    Qty in Cart: 0
    Price:
    $26.08
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    Isspro Generator Drive Tip Male .187 Tang

    Isspro Generator Drive Tip Male .187 Tang

    ISSPRO

    Now: $3.36
    Was: $28.25
    Signal Generator Drive TipAt 4 State Trucks, we offer aftermarket Isspro drive tips for signal generators. This drive tip features a .187 tang and comes with a warranty against defects in materials...
    29-071000
    SKU:
    29-071000
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $3.36
    Was: $28.25
    Qty in Cart: 0
    Price:
    Now: $3.36
    Was: $28.25
    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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