Semi Truck Engine
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- Engine Assemblies
- Engine Blocks
- Camshafts
- Crankshafts
- Cylinder Heads
- Valve Covers
- Valves & Valvetrain Parts
- Pistons, Rings & Connecting Rods
- Timing Gears, Chains & Covers
- Motor Mounts
- Intercoolers
- Oil Coolers
- Oil Filters
- Engine Management Systems
- Engine Bearings
- Oil Pumps
- Engine Oil Pans, Drain Plugs & Dipsticks
- Engine Pulleys
- Engine Sensors, Relays, Switches
- Serpentine Belts & Auxiliary Drive Belts
- Engine Rebuild Kits
- Engine Oil Additives
- Motor Oils
- Balance Shafts
- Timing Belts
- Dayco® - Engine Timing Chain Kit (KTC1387)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$367.20In Stock - Ships within 24 hrs
- Dayco® - Engine Timing Chain Kit (KTC1407)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$92.27In Stock - Ships within 24 hrs
- Dayco® - Engine Timing Chain Kit (KTC1389)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$151.94In Stock - Ships within 24 hrs
- Dayco® - Engine Timing Chain Kit (KTC1402)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$444.63In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89478)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$130.22In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89483)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$148.71In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89477)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$213.26In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89472)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$145.85In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89471)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$109.63In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89470)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$118.49In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89468)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$175.27In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89465)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$122.42In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89464)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$104.61In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89462)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$130.65In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89459)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$289.80In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89458)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$166.48In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89457)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$127.90In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89454)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$163.53In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89450)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$114.74In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89449)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$110.75In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89439)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$152.81In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89438)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$87.88In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89422)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$163.39In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89421)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$154.52In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Automatic Belt Tensioner Assembly (89420)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$96.32In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89120)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$43.49In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89107)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$158.55In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89113)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$59.68In Stock - Ships within 24 hrs
- Dayco® - GOLD Label™ No Slack™ Heavy Duty Idler/Tensioner Pulley (89112)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$75.83In Stock - Ships within 24 hrs
- Dayco® - No Slack™ 10 Rib Heavy Duty Automatic Belt Tensioner Assembly (89499)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$120.13In 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.