2003 Peterbilt 378 Engine
Select Your Submodel
- Engine Blocks
- Valves & Valvetrain Parts
- Pistons, Rings & Connecting Rods
- Oil Filters
- Serpentine Belts & Auxiliary Drive Belts
- Valve Covers
- Timing Gears, Chains & Covers
- Oil Pans, Drain Plugs & Dipsticks
- Cylinder Heads
- Engine Pulleys
- Engine Sensors, Relays, Switches
- Oil Pumps
- Oil Coolers
- Camshafts
- Crankshafts
- Engine Management Systems
- Engine Bearings
- Engine Rebuild Kits
- Intercoolers
- Throttle Bodies
- Motor Oils
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ACDelco®Professional™ Idler PulleyPeterbilt 378 2003, Professional™ Idler Pulley by ACDelco®. The ACDelco Professional, premium aftermarket Idler Pulley is designed for use on automobiles and light duty trucks as a locked center tensioning pulley, an automatic belt...Bearing is designed for application specific speed and load requirementsProvides reliable operation under severe conditions for year round performance$50.42 - Continental® ContiTech™Elite™ Drive Belt Idler PulleyPeterbilt 378 10.8L 2003, Elite™ Drive Belt Idler Pulley by Continental® ContiTech™. Every part in this assembly is engineered to look, install, and operate the same way or better than the factory parts. Every component meets...Original equipment equivalentFactory-like fit and dependability$27.61
- Dayco®No Slack™ Heavy Duty Idler/Tensioner PulleyPeterbilt 378 2003, 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$35.43
- SKP®Drive Belt Idler PulleyPeterbilt 378 2003, Drive Belt Idler Pulley by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$11.82
- PAI®Engine Oil PumpPeterbilt 378 2003, Engine Oil Pump by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$7.70 - $933.27
- PAI®Accessory DrivePeterbilt 378 12.7L 2003, Accessory Drive by PAI®. Sold Individually. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....With 34 tooth Helical Drive Gear for 12.7L engine2 Years Warranty$1,227.86
- PAI®Camshaft BearingPeterbilt 378 10.8L 2003, Camshaft Bearing by PAI®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$12.68
- PAI®Camshaft Bearing KitPeterbilt 378 2003, Camshaft Bearing Kit by PAI®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$14.04 - $269.59
- PAI®Compressor Mounting GasketsPeterbilt 378 2003, Compressor Mounting Gaskets by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...2 Years WarrantyPerfect blend of leading innovations and superior workmanship$8.10 - $20.21
- PAI®Cylinder Head GasketPeterbilt 378 2003, Cylinder Head Gasket by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$182.77 - $537.47
- PAI®High Performance™ Connecting Rod Bearing SetPeterbilt 378 2003, High Performance™ Connecting Rod Bearing Set by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$28.75 - $35.78
- PAI®High Performance™ Crankshaft Main Bearing KitPeterbilt 378 2003, High Performance™ Crankshaft Main Bearing Kit by PAI®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$310.38 - $374.26
- PAI®Lower Bearing KitPeterbilt 378 12.7L 2003, Lower Bearing Kit by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$524.73 - $548.17
- PAI®Timing Cover GasketPeterbilt 378 2003, Timing Cover Gasket by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$4.64 - $32.20
- Fel-Pro®Timing Cover Gasket SetPeterbilt 378 2003, Timing Cover Gasket Set by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet...Direct OEM replacement for a proper fitEnsures reliable sealing performance$15.84 - $54.79
- Dorman HD Solutions®Camshaft Position SensorPeterbilt 378 2003, Camshaft Position Sensor by Dorman HD Solutions®. This direct replacement camshaft position sensor matches the fit and performance of a failed original equipment sensor to restore proper engine starting and running,...Direct replacement - this camshaft position sensor matches the fit and performance of the original equipment sensorDurable construction - this part is manufactured to exacting standards to ensure reliable performance and durability$38.28 - $71.15
- PAI®Engine Oil Pan BoltPeterbilt 378 12.7L 2003, Engine Oil Pan Bolt by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$13.82
- PAI®Oil Feed GasketsPeterbilt 378 10.3L / 11.1L / 12.0L / 12.5L 2003, Oil Feed Gaskets by PAI®. 6 Pieces. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...2 Years WarrantyPerfect blend of leading innovations and superior workmanship$8.73
- PAI®Oil Filter Base GasketPeterbilt 378 10.3L / 11.1L / 12.0L / 12.5L 2003, Oil Filter Base Gasket by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$22.51
- PAI®Engine Oil Pump SealPeterbilt 378 2003, Engine Oil Pump Seal by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$2.16 - $65.34
- PAI®Hydraulic Pump Cover GasketsPeterbilt 378 10.8L / 14.9L 2003, Hydraulic Pump Cover Gaskets by PAI®. 5 Pieces. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...2 Years WarrantyPerfect blend of leading innovations and superior workmanship$2.96
- PAI®Oil Pressure Pump Regulator ValvePeterbilt 378 2003, Oil Pressure Pump Regulator Valve by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$48.86 - $125.70
- PAI®Oil Return GasketPeterbilt 378 10.8L 2003, Oil Return Gasket by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...2 Years WarrantyPerfect blend of leading innovations and superior workmanship$0.83 - $2.45
- PAI®Valve Stem Seal SetPeterbilt 378 12.7L 2003, Valve Stem Seal Set by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Intake / Exhaust2 Years Warranty$2.45
- PAI®Camshaft Plate GasketPeterbilt 378 2003, Camshaft Plate Gasket by PAI®. Designed utilizing the latest technology, this product by PAI features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$4.41 - $8.73
- PAI®Camshaft Rectangular Sealing RingPeterbilt 378 14.9L 2003, Camshaft Rectangular Sealing Ring by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$3.98
- PAI®Connecting Rod BushingPeterbilt 378 12.7L 2003, Connecting Rod Bushing by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$25.13
- PAI®Cylinder Head BoltPeterbilt 378 12.7L 2003, Cylinder Head Bolt by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$9.33 - $166.34
- PAI®Oil Drain Return TubePeterbilt 378 12.7L 2003, Oil Drain Return Tube by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$64.75 - $85.39
- PAI®Piston Cooling NozzlesPeterbilt 378 2003, Piston Cooling Nozzles by PAI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$14.41 - $16.96
