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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
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Mounting Package For Fuel Pump W/ 95 Or 165 GPH Flow Rating For Class 8 Applications

    Mounting Package For Fuel Pump W/ 95 Or 165 GPH Flow Rating For Class 8 Applications

    FASS

    $40.79
    Mounting Package For Fuel Pump W/ 95 Or 165 GPH Flow Rating* High Quality Mounting Package* For Fuel Pump For Class 8 Trucks* For Fuel Pumps With 95 Or 165 Gallons Per Hour Flow Rating* Made In The...
    09-07030008
    SKU:
    09-07030008
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $40.79
    Qty in Cart: 0
    Price:
    $40.79
    Subtotal:
  • FASS Industrial Series Diesel 260 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 260 GPH Fuel System, Class 8

    FASS

    $1,135.99
    260 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* 260 Gallons Per Hour Flow Rating*...
    09-07030007
    SKU:
    09-07030007
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,135.99
    Qty in Cart: 0
    Price:
    $1,135.99
    Subtotal:
  • FASS Industrial Series Diesel 240 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 240 GPH Fuel System, Class 8

    FASS

    $891.99
    240 GPH Fuel SystemThis Industrial Series Diesel Fuel System delivers 240 gallons per hour and connects seamlessly to your OEM engine fuel return, no extra fuel line needed. With a 16 PSI preset...
    09-07030006
    SKU:
    09-07030006
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $891.99
    Qty in Cart: 0
    Price:
    $891.99
    Subtotal:
  • FASS Industrial Series Diesel 140 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 140 GPH Fuel System, Class 8

    FASS

    $1,032.99
    140 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* 140 Gallons Per Hour Flow Rating*...
    09-07030005
    SKU:
    09-07030005
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,032.99
    Qty in Cart: 0
    Price:
    $1,032.99
    Subtotal:
  • FASS Industrial Series Diesel 100 GPH Fuel System For Class 8 UIM Engines

    FASS Industrial Series Diesel 100 GPH Fuel System For Class 8 UIM Engines

    FASS

    $789.99
    100 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 * 100 Gallons...
    09-07030003
    SKU:
    09-07030003
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $789.99
    Qty in Cart: 0
    Price:
    $789.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 2.5 Inch Flexible Coolant Hose

    BESTfit 2.5 Inch Flexible Coolant Hose

    BESTFIT TRUCK PARTS

    $94.99
    BESTfit Flexible Coolant Hose* High Quality Coolant Hose* Specialty Hose* 2.50 Inch Inside Diameter* 2.82 Inch Outside Diameter* 8.50 Inch Length* Has Stainless Steel Reinforcement Rings* Once...
    09-0702047
    SKU:
    09-0702047
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $94.99
    Qty in Cart: 0
    Price:
    $94.99
    Subtotal:
  • FREE SHIPPING
    BESTfit Coolant Flex Hose Heavy Duty Silicone 2.5 ID X 36 Inch

    BESTfit Coolant Flex Hose Heavy Duty Silicone 2.5 ID X 36 Inch

    BESTFIT TRUCK PARTS

    $452.99
    BESTfit 2.50 ID X 36 Inch Heavy Duty Silicone Coolant Flex Hose* High Quality Silicone Coolant Hose* 2.50 Inch Inside Diameter - 64MM* 2.92 Inch Outside Diameter - 74MM* 36 Inches Length* 6 Inch Bend...
    09-0702045
    SKU:
    09-0702045
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $452.99
    Qty in Cart: 0
    Price:
    $452.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Coolant Hose 90 Degree

    BESTfit Coolant Hose 90 Degree

    BESTFIT TRUCK PARTS

    $78.99
    BESTfit Coolant Hose 90 Degree* High Quality Coolant Hose* 90 Degree* 2.5 Inch ID x 10 Inch* 2.920 Inch OD* Tighter Bend Radius Than Most Other Elbows* Temeperature Range Is -65F To +350 F Degrees*...
    09-0702044
    SKU:
    09-0702044
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $78.99
    Qty in Cart: 0
    Price:
    $78.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Fleet Charge Pre-Mixed 50/50 Coolant- 1 Gallon

    Fleet Charge Pre-Mixed 50/50 Coolant- 1 Gallon

    PARTS DISTRIBUTING

    $13.30
    Antifreeze Fleet Charge Radiator CoolantRegulate the temperature in heavy duty diesel, gasoline, and natural gas engines with this high quality Fleet Coolant/Antifreeze. It is the original fully...
    09-0702042
    SKU:
    09-0702042
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Capacity:
    1 Gallon
    Ready To Ship:
    Yes
    $13.30
    Qty in Cart: 0
    Price:
    $13.30
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 1 Inch ID X 25 Feet

    BESTfit Blue Silicone Heater Hose - 1 Inch ID X 25 Feet

    BESTFIT TRUCK PARTS

    $145.99
    BESTfit Blue Silicone Heater Hose - 1 Inch ID X 25 Feet* High Quality Heater Hose* Made Of Silicone* Blue* Dimensions:  - 1 Inch Inner Diameter   - 25 Feet* Sold Individually* Warranty On Heater Hose...
    09-070200007
    SKU:
    09-070200007
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $145.99
    Qty in Cart: 0
    Price:
    $145.99
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 0.625 Inch ID X 25 Feet

    BESTfit Blue Silicone Heater Hose - 0.625 Inch ID X 25 Feet

    BESTFIT TRUCK PARTS

    $71.99
    BESTfit Blue Silicone Heater Hose - 0.625 Inch ID X 25 Foot* High Quality Heater Hose* Made Of Silicone* Blue* Dimensions:  - 0.625 Inch ID   - 25 Feet* Sold Individually* Warranty On Heater Hose...
    09-070200005
    SKU:
    09-070200005
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $71.99
    Qty in Cart: 0
    Price:
    $71.99
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 0.5 Inch ID X25 Feet

    BESTfit Blue Silicone Heater Hose - 0.5 Inch ID X25 Feet

    BESTFIT TRUCK PARTS

    $81.99
    BESTfit Blue Silicone Heater Hose - 0.5 Inch ID X 25 Foot* High Quality Heater Hose * Silicone* Blue * 0.500 Inch I.D.* 25 Feet* Sold Individually * Warranty On Heater Hose Against Defects In...
    09-070200004
    SKU:
    09-070200004
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $81.99
    Qty in Cart: 0
    Price:
    $81.99
    Subtotal:
  • BESTfit Blue Silicone Heater Hose - 0.25 Inch ID X 25 Feet

    BESTfit Blue Silicone Heater Hose - 0.25 Inch ID X 25 Feet

    BESTFIT TRUCK PARTS

    $55.99
    BESTfit Blue Silicone Heater Hose - 0.25 Inch ID X 25 Foot* High Quality Heater Hose* Silicone * Blue * 0.25 I.D. * 25 Feet * Sold Individually * Warranty On Heater Hose Against Defects In...
    09-070200002
    SKU:
    09-070200002
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $55.99
    Qty in Cart: 0
    Price:
    $55.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose

    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose

    BESTFIT TRUCK PARTS

    $32.24
    BESTfit 2.5 To 2 Inch X 6 Inch Silicone Coolant Hose* High Quality Silicone Coolant Hose* 2.5 Inch To 2 inch Diameter* 6 Inches Long* Can Be Used For CAC Hose* Temp Range -65F To +500F* Sold...
    09-070126
    SKU:
    09-070126
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $32.24
    Qty in Cart: 0
    Price:
    $32.24
    Subtotal:
  • On Sale
    Limited Quantity Available
    FREE SHIPPING OVER $249
    BESTfit 3.75 Inch X 3 Foot Charge Air Cooler Hose

    BESTfit 3.75 Inch X 3 Foot Charge Air Cooler Hose

    BESTFIT TRUCK PARTS

    Now: $45.76
    Was: $194.99
    BESTfit Charge Air Cooler Hose* High Quality Charge Air Cooler Hose* 3.75 Inch ID x 3 Foot* Sold Individually* Warranty On Charge Air Cooler Hoses Against Defects In Workmanship & Material From Date...
    09-070121
    SKU:
    09-070121
    Truck Class:
    Light Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $45.76
    Was: $194.99
    Qty in Cart: 0
    Price:
    Now: $45.76
    Was: $194.99
    Subtotal:
  • BESTfit 3 ID X 6 Inch 4 Ply Nomex Hot Side Coupler Hump Hose

    BESTfit 3 ID X 6 Inch 4 Ply Nomex Hot Side Coupler Hump Hose

    BESTFIT TRUCK PARTS

    $38.57
    BESTfit High Temperature Coupler HoseThis silicone 4 ply and 6 inch long hump hose is made of a flexible silicone rubber shaped like a hump or a wave. It is used to connect two 3 inch ID pipes or...
    09-070106
    SKU:
    09-070106
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $38.57
    Qty in Cart: 0
    Price:
    $38.57
    Subtotal:
  • BESTfit AC Compressor Clutch 12 Volt York Style With 1 Wire

    BESTfit AC Compressor Clutch 12 Volt York Style With 1 Wire

    BESTFIT TRUCK PARTS

    $178.99
    BESTfit AC Clutch York Style 6 Inch Diameter* High Quality AC Clutch* York Style* 6 Inch Diameter* A1 Groove* 1 Wire* 12 Volt* Key Shaft* 3 Inch MD* Sold Individually* Warranty On AC Clutches Against...
    09-070098
    SKU:
    09-070098
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $178.99
    Qty in Cart: 0
    Price:
    $178.99
    Subtotal:
  • BESTfit AC Compressor W/ 6 Groove Clutch & Single Wire

    BESTfit AC Compressor W/ 6 Groove Clutch & Single Wire

    BESTFIT TRUCK PARTS

    $379.99
    AC Compressor W/ 6 Groove Clutch & Single Wire By BESTfit Replaces 6513025, 7513025* High Quality AC Compressor* 6 Groove 125MM Clutch* Single Wire* OEM Number Inch S 5513025, 6513025, 7513025,...
    09-070024
    SKU:
    09-070024
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $379.99
    Qty in Cart: 0
    Price:
    $379.99
    Subtotal:
  • BESTfit Ear-Mount AC Compressor Sanden With 2 Groove 132MM Clutch, 1 Wire Connection

    BESTfit Ear-Mount AC Compressor Sanden With 2 Groove 132MM Clutch, 1 Wire Connection

    BESTFIT TRUCK PARTS

    $255.99
    BESTfit AC Compressor - Replaces 2241180000, ABPN83304843, N83-304274, N83-304572 & N83-304843* High Quality AC Compressor* Connector: 1 Wire Female Weatherpack* Connector Type: Female* Cylinder...
    09-0700218
    SKU:
    09-0700218
    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 A/C Compressor Sanden SD7H15 W/ 8 Groove Clutch

    BESTfit A/C Compressor Sanden SD7H15 W/ 8 Groove Clutch

    BESTFIT TRUCK PARTS

    $283.99
    BESTfit AC Compressor Sanden SD7H15* High Quality AC Compressor* Ear Mount* With 8 Groove Clutch* 12Volt* 2 Wire Plug* OEM Number 1804173, 1804178, F696001211, And F696002212 5361* Sold Individually*...
    09-070020
    SKU:
    09-070020
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $283.99
    Qty in Cart: 0
    Price:
    $283.99
    Subtotal:
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Adding your products to cart

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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