Semi Truck Engine

Semi Truck Engine
  • Dayco® - Engine Timing Chain Kit
    Dayco® - Engine Timing Chain Kit (KTC1387)
    0
    # mpn4981117079
    Engine Timing Chain Kit (KTC1387) by Dayco®. Designed to maintain constant belt tension, this tensioner provides less variations in tension to prevent premature accessory bearing failure due to high belt tension, when a new belt is...
    Maintains constant tension on serpentine belt drivesEliminates belt noise and reduces slippage
    $367.20
    In Stock - Ships within 24 hrs
  • Dayco® - Engine Timing Chain Kit
    Dayco® - Engine Timing Chain Kit (KTC1407)
    0
    # mpn4981117076
    Engine Timing Chain Kit (KTC1407) by Dayco®. Designed to maintain constant belt tension, this tensioner provides less variations in tension to prevent premature accessory bearing failure due to high belt tension, when a new belt is...
    Maintains constant tension on serpentine belt drivesEliminates belt noise and reduces slippage
    $92.27
    In Stock - Ships within 24 hrs
  • Dayco® - Engine Timing Chain Kit
    Dayco® - Engine Timing Chain Kit (KTC1389)
    0
    # mpn4981117075
    Engine Timing Chain Kit (KTC1389) by Dayco®. Designed to maintain constant belt tension, this tensioner provides less variations in tension to prevent premature accessory bearing failure due to high belt tension, when a new belt is...
    Maintains constant tension on serpentine belt drivesEliminates belt noise and reduces slippage
    $151.94
    In Stock - Ships within 24 hrs
  • Dayco® - Engine Timing Chain Kit
    Dayco® - Engine Timing Chain Kit (KTC1402)
    0
    # mpn4981117064
    Engine Timing Chain Kit (KTC1402) by Dayco®. Designed to maintain constant belt tension, this tensioner provides less variations in tension to prevent premature accessory bearing failure due to high belt tension, when a new belt is...
    Maintains constant tension on serpentine belt drivesEliminates belt noise and reduces slippage
    $444.63
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89478)
    0
    # mpn1362545436
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89478) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $130.22
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89483)
    0
    # mpn385429796
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $148.71
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89477)
    1
    # mpn385429792
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89477) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $213.26
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89472)
    0
    # mpn385429736
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89472) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $145.85
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89471)
    0
    # mpn385429735
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89471) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $109.63
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89470)
    0
    # mpn385429734
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89470) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $118.49
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89468)
    0
    # mpn385429733
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $175.27
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89465)
    0
    # mpn385429730
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89465) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $122.42
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89464)
    0
    # mpn385429729
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89464) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $104.61
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89462)
    0
    # mpn385429728
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89462) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $130.65
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89459)
    0
    # mpn385429725
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89459) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $289.80
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89458)
    0
    # mpn385429724
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89458) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $166.48
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89457)
    0
    # mpn385429723
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89457) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $127.90
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89454)
    0
    # mpn385429720
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89454) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $163.53
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89450)
    0
    # mpn385429718
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89450) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $114.74
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89449)
    0
    # mpn385429717
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89449) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $110.75
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89439)
    0
    # mpn385429713
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89439) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $152.81
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89438)
    0
    # mpn385429712
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89438) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $87.88
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89422)
    0
    # mpn385429701
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89422) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $163.39
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89421)
    0
    # mpn385429700
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89421) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $154.52
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89420)
    0
    # mpn385429699
    GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89420) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $96.32
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89120)
    0
    # mpn4205079233
    GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89120) by Dayco®. Dayco's reputation for top performance idler and tensioner pulleys is a result of advanced automotive technologies employed in materials research, design...
    Made with precision and quality in mindDesigned to meet your specific needs
    $43.49
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89107)
    0
    # mpn1362543919
    GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley by Dayco®. Dayco's reputation for top performance idler and tensioner pulleys is a result of advanced automotive technologies employed in materials research, design...
    Made with precision and quality in mindDesigned to meet your specific needs
    $158.55
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89113)
    0
    # mpn1362543918
    GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89113) by Dayco®. Dayco's reputation for top performance idler and tensioner pulleys is a result of advanced automotive technologies employed in materials research, design...
    Made with precision and quality in mindDesigned to meet your specific needs
    $59.68
    In Stock - Ships within 24 hrs
  • Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley
    Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89112)
    0
    # mpn1362543917
    GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89112) by Dayco®. Dayco's reputation for top performance idler and tensioner pulleys is a result of advanced automotive technologies employed in materials research, design...
    Made with precision and quality in mindDesigned to meet your specific needs
    $75.83
    In Stock - Ships within 24 hrs
  • Dayco® - No Slack™ 10 Rib Heavy Duty Automatic Belt Tensioner Assembly
    Dayco® - No Slack™ 10 Rib Heavy Duty Automatic Belt Tensioner Assembly (89499)
    0
    # mpn4531030847
    No Slack™ 10 Rib Heavy Duty Automatic Belt Tensioner Assembly (89499) by Dayco®. Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories. Designed to maintain constant tension on...
    Heavy duty cast aluminum spring case that resists cracking and fatigueSteel pivot tube which provides additional strength for critical torque requirements
    $120.13
    In Stock - Ships within 24 hrs




To travel long distances while pulling a trailer that can weigh close to 80,000 lbs, your big rig needs an extremely powerful and reliable engine. Since the reliability of any system is determined by its weakest link, each and every replacement engine part you purchase should be of the highest quality. To cover your needs for best-in-class semi truck replacement engine parts, we have gathered them on our digital shelves. Regardless of the product you are looking for, whether it is a set of piston rings or a replacement engine head, we have the right option at an affordable price.

The engine of your semi truck must produce enough horsepower and torque to be able to move huge loads across the country day in and day out. Each year, you may cover up to 50,000 miles in your big rig or even more. It means that sooner or later some components and systems of your engine will require maintenance or repair. On the digital shelves of our online store, you can find a huge assortment of parts, rebuild kits, and complete semi truck engine assemblies that you may need to keep your machine on the road hauling cargo and making you money.

Since semi trucks need a lot of torque on low RPMs to be able to pull heavy loads with decent fuel mileage, almost all big rigs today run on diesel. You can increase the output of your powerplant significantly by adding a turbocharger or supercharger. Such a unit pumps more air into the engine thus allowing for adding more fuel to the mixture. The difference is that a turbocharger is actuated by a turbine propelled by the exhaust gases flow, hence the name, while a supercharger uses the engine power receiving it from the crankshaft through the pulley system.

Intercoolers are designed for further improvement of turbocharged and supercharged engine efficiency by cooling down intake air thus increasing its charge density. Increased airflow improves combustion, increases horsepower and torque. In our store, you can find a huge assortment of aftermarket intercoolers and all required hoses, clamps, and couplings. We offer a wide variety of top-notch engine blocks, including bare blocks, expansion plug kits, engine block heaters, and other related parts. Browse our extensive catalogs of crankshafts, camshafts, valvetrain parts, and more to find all of the needed components, such as seals, gaskets, and bearings.

All semi trucks work much harder than other types of vehicles which means they are subject to accelerated wear and tear and must be maintained properly to serve you for many years to come. The problems with your semi truck’s engine can have severe consequences. Too much smoke coming out of the exhaust pipes, reduced oil pressure, or loss of power are all signs of engine malfunctions. It is essential to carry out regular engine compression tests and provide timely maintenance to avoid more expensive repairs. Don’t forget to change the oil regularly to prolong the service life of your engine and reduce the chance of failure.

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