2004 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
- Harmonic Balancers
- Engine Rebuild Kits
- Intercoolers
- Throttle Bodies
- Motor Oils
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PAI®Jake Brake GasketPeterbilt 378 10.8L 2004, Jake Brake 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$49.98 - PAI®Oil Drain Return TubePeterbilt 378 12.7L 2004, 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 2004, 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
- PAI®Rocker Cover IsolatorPeterbilt 378 12.7L 2004, Rocker Cover Isolator 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$7.84
- PAI®Valve Cover GasketPeterbilt 378 2004, Valve Cover 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 manufactured...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$28.48 - $175.64
- Dorman HD Solutions®Valve Cover GasketPeterbilt 378 10.8L 2004, Valve Cover Gasket by Dorman HD Solutions®. This valve cover gasket is designed to precisely match the original equipment gasket for specific engine applications. Made of durable materials, this gasket provides...Ideal replacement - this valve cover gasket matches the fit and function of the original equipment gasketDurable materials - this valve cover gasket is made of quality materials for a reliable, long-lasting seal$85.60
- PAI®Upper Engine Gasket SetPeterbilt 378 2004, Upper Engine Gasket 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 from...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$292.54 - $597.47
- PAI®Cylinder Head Stud KitPeterbilt 378 12.5L 2004, Cylinder Head Stud 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...Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$385.02
- PAI®Liner ShimsPeterbilt 378 10.8L 2004, Liner Shims 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 craftsmanship. Manufactured...2 Years WarrantyPerfect blend of leading innovations and superior workmanship$18.24
- PAI®Valve Cover Bolt IsolatorsPeterbilt 378 10.8L 2004, Valve Cover Bolt Isolators 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$6.08
- MotoRad®Oil Filler CapPeterbilt 378 12.7L 2004, Oil Filler Cap by MotoRad®. 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 in mind. It will meet...Made with precision and quality in mindDesigned to meet your specific needs$13.07
- Genuine®Motor OilMotor Oil, by Genuine®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running out...$9.52 - $18.85
- Motorcraft®SAE 5W-20 Full Synthetic High Mileage Motor Oil, 1 QuartSAE 5W-20 Full Synthetic High Mileage Motor Oil, 1 Quart by Motorcraft®. 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 in...$5.62
- Hastings®Open One End Hydraulic Filter ElementPeterbilt 378 2004, Open One End Hydraulic Filter Element by Hastings®. 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 unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$15.53
- ACDelco®Specialty™ Heavy Duty V-Ribbed Serpentine BeltPeterbilt 378 2004, Specialty™ Heavy Duty V-Ribbed Serpentine Belt by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your...Made with precision and quality in mindDesigned to meet your specific needs$26.44 - $71.86
- Gates®RPM Micro-V™ V-Ribbed BeltPeterbilt 378 10.8L with A/C 2004, RPM Micro-V™ V-Ribbed Belt by Gates®. Length: 54.521". Racing, Performance, Muscle. The only belt in the industry specifically designed for high-output and forced induction engines....Advanced, exact-fit and precision-ground belt profileTwo layers of adhesion gum for maximum strength and durability$48.96
- ACDelco®Specialty™ Fleetrunner Heavy Duty V-Ribbed Serpentine BeltSpecialty™ Fleetrunner Heavy Duty V-Ribbed Serpentine Belt by ACDelco®. Limited Lifetime as long as original purchaser owns vehicle. This top-grade product is expertly made in compliance with stringent industry standards to offer a...High quality at an affordable priceExpertly made from premium materials$66.79
- ACDelco®Specialty™ Heavy Duty High Capacity V-BeltPeterbilt 378 L6 12.0L with A/C 2004, Specialty™ Heavy Duty High Capacity V-Belt by ACDelco®. Length: 46". Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than...Made with precision and quality in mindDesigned to meet your specific needs$19.09
- Continental® ContiTech™Extreme Duty Multi V-BeltPeterbilt 378 6 12.0L 2004, Extreme Duty Multi V-Belt by Continental® ContiTech™. 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...Made with precision and quality in mindDesigned to meet your specific needs$57.83
- Continental® ContiTech™Serpentine BeltPeterbilt 378 14.9L 2004, Serpentine Belt by Continental® ContiTech™. 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....Made with precision and quality in mindDesigned to meet your specific needs$56.63
- Goodyear Belts®Serpentine KitPeterbilt 378 2004, Serpentine Kit by Goodyear Belts®. Goodyear Belts has developed multi V-belts that meet or exceed OE requirements, ensuring long belt life and quiet operation. Restore your belt drive system’s efficiency by...Meets or Exceeds OEM SpecificationsLong-life EPDM Rubber Compound$220.05 - $229.09
- PAI®Engine Oil PanPeterbilt 378 12.7L 2004, Engine Oil Pan 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$632.42
- Dorman HD Solutions®Engine Oil PanPeterbilt 378 2004, Engine Oil Pan by Dorman HD Solutions®. Oil pan leaking? This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.Direct replacement - this engine oil pan is made to match the original pan on specific vehiclesComplete assembly - includes replacement pan and drain plugs to match original components$524.36 - $678.56
- Dorman HD Solutions®Heavy Duty Engine Oil DipstickPeterbilt 378 10.8L 2004, Heavy Duty Engine Oil Dipstick by Dorman HD Solutions®. This replacement engine oil dipstick is a direct replacement for a damaged or missing original equipment dipstick. Level marks are clearly distinguished...Ideal replacement - this engine oil dipstick matches the fit and function of the original equipment dipstick to ensure a dependable replacementQuality construction - this dipstick is made of the same materials as the original equipment dipstick for reliable service$52.13
- Dorman HD Solutions®Drive Belt TensionerPeterbilt 378 14.9L 2004, Drive Belt Tensioner by Dorman HD Solutions®. 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 in...Made with precision and quality in mindDesigned to meet your specific needs$225.94
- Goodyear Belts®Drive Belt Idler PulleyPeterbilt 378 2004, Drive Belt Idler Pulley by Goodyear Belts®. 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 in mind. It...Made with precision and quality in mindDesigned to meet your specific needs$30.51 - $104.65
- PAI®Crankshaft Main BearingPeterbilt 378 10.8L 2004, Crankshaft Main Bearing 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$216.54
- PAI®Crankshaft Position SensorPeterbilt 378 12.7L 2004, Crankshaft Position Sensor 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$29.95
- Dorman HD Solutions®Engine Control ModulePeterbilt 378 12.7L 2004, Engine Control Module by Dorman HD Solutions®. 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 in...Made with precision and quality in mindDesigned to meet your specific needs$2,044.10
- Dorman HD Solutions®Rear Driver Side Crankshaft Position SensorPeterbilt 378 11.1L 2004, Rear Driver Side Crankshaft Position Sensor by Dorman HD Solutions®. This direct replacement crankshaft position sensor matches the fit and function of the original equipment sensor for a reliable repair. This...Direct replacement - this crankshaft position sensor is a precise match for the fit and function of the original equipment sensorReady to install - matches the factory-style connector for plug-and-play installation$101.14
