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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
  • RigMaster A/C Expansion Valve For Caterpillar, Perkins, Kohler

    RigMaster A/C Expansion Valve For Caterpillar, Perkins, Kohler

    RIGMASTER

    $45.34
    Expansion Valve - LG9-003* High Quality Expansion Valve* Sold Individually * Warranty On Expansion Valves Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...
    LG9003
    SKU:
    LG9003
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $45.34
    Qty in Cart: 0
    Price:
    $45.34
    Subtotal:
  • RigMaster Poly Serpentine Belt For A/C Compressor

    RigMaster Poly Serpentine Belt For A/C Compressor

    RIGMASTER

    $64.99
    A/C Compressor Belt - Serpentine - LG8-006* High Quality Serpentine Belt * Poly * For A/C Compressor * Sold Individually * Warranty On Serpentine Belts Against Defects In Workmanship & Material From...
    LG8006
    SKU:
    LG8006
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $64.99
    Qty in Cart: 0
    Price:
    $64.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    RigMaster Generator / AC Compressor Serpentine Belt For Kohler Engine

    RigMaster Generator / AC Compressor Serpentine Belt For Kohler Engine

    RIGMASTER

    Now: $13.92
    Was: $45.45
    Kohler Generator/AC Compressor Belt - KT8-001* High Quality Serpentine Belt * For Generator/ AC Compressor* Sold Individually * Warranty On Serpentine Belts Against Defects In Workmanship & Material...
    KT8001
    SKU:
    KT8001
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $13.92
    Was: $45.45
    Qty in Cart: 0
    Price:
    Now: $13.92
    Was: $45.45
    Subtotal:
  • RigMaster Oil Filter - Longer Version For Caterpillar, Perkins Engines

    RigMaster Oil Filter - Longer Version For Caterpillar, Perkins Engines

    RIGMASTER

    $10.62
    Longer Version Oil Filter For Caterpillar, Perkins Engines - LG1233* High Quality Oil Filter * Longer Version * Sold Individually * Warranty On Oil Filters Against Defects In Workmanship & Material...
    LG1233
    SKU:
    LG1233
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $10.62
    Qty in Cart: 0
    Price:
    $10.62
    Subtotal:
  • RigMaster Fan / Alternator V Belt 10 MM x 850 MM For Kohler Engine

    RigMaster Fan / Alternator V Belt 10 MM x 850 MM For Kohler Engine

    RIGMASTER

    $17.40
    Kohler V Belt For Fan And Alternator - KT8-003* High Quality V Belt * 10 MM x 850 MM* For Fan And Alternator * Sold Individually * Warranty On V Belts Against Defects In Workmanship & Material From...
    KT8003
    SKU:
    KT8003
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $17.40
    Qty in Cart: 0
    Price:
    $17.40
    Subtotal:
  • RigMaster Armor Plated Vibration Mount / Grommet

    RigMaster Armor Plated Vibration Mount / Grommet

    RIGMASTER

    $26.47
    Armor Plated Vibration Mount / Grommet - LG11-001* High Quality Vibration Mount * Armor Plated * Grommet * Sold Individually* Warranty On Vibration Mounts Against Defects In Workmanship & Material...
    LG11001
    SKU:
    LG11001
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $26.47
    Qty in Cart: 0
    Price:
    $26.47
    Subtotal:
  • RigMaster Analog Speed Sensor Upgrade Kit For T4-6 Units W/ Kohler Engine

    RigMaster Analog Speed Sensor Upgrade Kit For T4-6 Units W/ Kohler Engine

    RIGMASTER

    $181.99
    Kohler Analog Kit - KT7-106K* High Quality Analog Kit * Includes:  - Mechanical/Analog Speed Sensor   - Analog Speed Sensor Connector With Pigtail   - Tensioner Bracket   - Ring Terminal With Extra...
    KT7106K
    SKU:
    KT7106K
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $181.99
    Qty in Cart: 0
    Price:
    $181.99
    Subtotal:
  • RigMaster Diesel Glow Plug For Kohler Engine

    RigMaster Diesel Glow Plug For Kohler Engine

    RIGMASTER

    $60.99
    Kohler Diesel Glow Plug - K-004* High Quality Glow Plug* Sold Individually* Warranty On Glow Plugs Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...
    K004
    SKU:
    K004
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $60.99
    Qty in Cart: 0
    Price:
    $60.99
    Subtotal:
  • RigMaster Analog Speed Sensor Upgrade Kit For LG200 Units W/ Kohler Engine

    RigMaster Analog Speed Sensor Upgrade Kit For LG200 Units W/ Kohler Engine

    RIGMASTER

    $131.99
    Kohler Analog Speed Sensor Upgrade Kit - KL7-106K* High Analog Kit * Includes  - Mechanical/Analog Speed Sensor   - Analog Speed Sensor Connector With Pigtail   - Speed Sensor Bracket  - (2)...
    KL7106K
    SKU:
    KL7106K
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    RigMaster Non- Return Valve For Kohler Engine

    RigMaster Non- Return Valve For Kohler Engine

    RIGMASTER

    Now: $58.44
    Was: $357.99
    Kohler Non- Return Valve - ED0096800410-SThe non-return valve for Kohler engines allows compressed air to flow in one direction while preventing flow in the other, ensuring protection when fitted...
    ED0096800410S
    SKU:
    ED0096800410S
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $58.44
    Was: $357.99
    Qty in Cart: 0
    Price:
    Now: $58.44
    Was: $357.99
    Subtotal:
  • On Sale
    Limited Quantity Available
    RigMaster Fan Alternator V-Belt For LG200 Kohler Engine

    RigMaster Fan Alternator V-Belt For LG200 Kohler Engine

    RIGMASTER

    Now: $8.40
    Was: $25.54
    Kohler Fan Alternator V-Belt - KL8-002* High Quality V Belt * 10 MM x 891 MM* For Fan/Alternator * Sold Individually* Warranty On V Belts Against Defects In Workmanship & Material From Date Of...
    KL8002
    SKU:
    KL8002
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    Now: $8.40
    Was: $25.54
    Qty in Cart: 0
    Price:
    Now: $8.40
    Was: $25.54
    Subtotal:
  • RigMaster Diesel Fuel Filter K003R2 For Kohler Engine

    RigMaster Diesel Fuel Filter K003R2 For Kohler Engine

    RIGMASTER

    $53.99
    Kohler Diesel Fuel Filter - K-003-R2* High Fuel Filter * Sold Individually * Warranty On Fuel Filters Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...
    K003R2
    SKU:
    K003R2
    Truck Class:
    Heavy Duty
    Material Options:
    Fiberglass
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $53.99
    Qty in Cart: 0
    Price:
    $53.99
    Subtotal:
  • RigMaster Replacement Air Filter K001 For K Series Kohler Engine

    RigMaster Replacement Air Filter K001 For K Series Kohler Engine

    RIGMASTER

    $61.36
    K Series Kohler Engines Replacement Air Filter - K-001* High Quality Air Filter * Sold Individually * Warranty On Air Filters Against Defects In Workmanship & Material From Date Of Purchase*** High...
    K001
    SKU:
    K001
    Truck Class:
    Heavy Duty
    Material Options:
    Paper
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $61.36
    Qty in Cart: 0
    Price:
    $61.36
    Subtotal:
  • RigMaster Solenoid Fuel Stop Valve For Kohler Engine

    RigMaster Solenoid Fuel Stop Valve For Kohler Engine

    RIGMASTER

    $226.99
    Replacement Kohler El Valve ED0035871190-S* High Quality Fuel Solenoid * Electro Valve* Sold Individually* Warranty On Fuel Solenoids Against Defects In Workmanship & Material From Date Of...
    ED0035871190S
    SKU:
    ED0035871190S
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $226.99
    Qty in Cart: 0
    Price:
    $226.99
    Subtotal:
  • RigMaster Outer Exhaust Manifold Gasket For Kohler Engine

    RigMaster Outer Exhaust Manifold Gasket For Kohler Engine

    RIGMASTER

    $6.03
    Kohler Outer Exhaust Manifold Gasket - ED0045011010-S* High Quality Gasket* Outer * For Exhaust Manifold* Sold Individually * Warranty On Gaskets Against Defects In Workmanship & Material From Date...
    ED0045011010S
    SKU:
    ED0045011010S
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $6.03
    Qty in Cart: 0
    Price:
    $6.03
    Subtotal:
  • RigMaster Valve Cover Gasket For Kohler Engine

    RigMaster Valve Cover Gasket For Kohler Engine

    RIGMASTER

    $33.98
    Kohler Valve Cover Gasket ED0044001030-S* High Quality Gasket* For Valve Cover* Sold Individually * Warranty On Gaskets Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    ED0044001030S
    SKU:
    ED0044001030S
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $33.98
    Qty in Cart: 0
    Price:
    $33.98
    Subtotal:
  • RigMaster Pro Performance Oil Filter K002 For Kohler Engine

    RigMaster Pro Performance Oil Filter K002 For Kohler Engine

    RIGMASTER

    $23.97
    Kohler Pro Performance Oil Filter - K-002* High Quality Oil Filter* Sold Individually* Warranty On Oil Filters Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...
    K002
    SKU:
    K002
    Truck Class:
    Heavy Duty
    Material Options:
    Fiberglass
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $23.97
    Qty in Cart: 0
    Price:
    $23.97
    Subtotal:
  • RigMaster Intake Manifold Gasket For Kohler Engine

    RigMaster Intake Manifold Gasket For Kohler Engine

    RIGMASTER

    $36.29
    Kohler Intake Manifold Gasket - ED0044200800-S* High Quality Gasket * For Intake Manifold* Sold Individually* Warranty On Gaskets Against Defects In Workmanship & Material From Date Of Purchase***...
    ED0044200800S
    SKU:
    ED0044200800S
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $36.29
    Qty in Cart: 0
    Price:
    $36.29
    Subtotal:
  • Poly- V Ribbed Serpentine Belt 38.10 Inch - 4040377

    Poly- V Ribbed Serpentine Belt 38.10 Inch - 4040377

    AUTOMANN USA

    $32.12
    4 Rib 38.10 Inch Poly- V Serpentine Belt Replaces 4040377* High Quality V Serpentine Belt* Poly* Dimensions: - 37.70 Inch Effective Length  - 38.10 Inch Outside Length* Number Of Ribs- 4* Sold...
    29-07060058
    SKU:
    29-07060058
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Length Options:
    38 Inch
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $32.12
    Qty in Cart: 0
    Price:
    $32.12
    Subtotal:
  • Poly-V Ribbed Serpentine Belt 42.90 Inch - 4040425

    Poly-V Ribbed Serpentine Belt 42.90 Inch - 4040425

    AUTOMANN USA

    $21.93
    4 Rib 42.90 Inch Poly-V Serpentine Belt Replaces 4040425* High Quality Serpentine Belt * Poly* Dimensions: - 42.50 Inch Effective Length - 42.90 Inch Outside Length* Number Of Ribs- 4* Sold...
    29-07060054
    SKU:
    29-07060054
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Length Options:
    42 1/2 Inch
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $21.93
    Qty in Cart: 0
    Price:
    $21.93
    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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