Reliable Kenworth Truck Engine Parts
Keep your Kenworth T600, T680, T800, or W900 running strong with our premium lineup of semi truck engine parts. Whether you're doing a quick repair or a full performance upgrade, our extensive lineup heavy-duty replacement engine parts have got you covered. Shop tough, road-tested components like AC evaporators, engine mounts, fuel systems, turbochargers, and serpentine beltsâall built to handle real-world miles.
Looking for more power and durability? Check out our 3-piece exhaust manifold kits for better heat management and longer life. Need better airflow? Our hot side hump hoses handle high temps and cut down vibration stress. We even stock coolant hose reducers, oil coolers, flywheel housings, and heavy-duty AC compressors to keep your engine cool and your cab comfortable.
Consider a full upgrade with
Kenworth engine cooling parts,
exhaust elbow, piping and components, and
related Kenworth transmission parts. When it comes to truck engine parts, every piece matters. From water pumps that prevent overheating to oil filler caps that keep contaminants out, these semi engine parts work together to protect your investment and keep you rolling.
Best Features of Our Heavy-Duty Semi-Truck Engine Parts
- Aftermarket parts built for serious commercial duty.
- Fits Kenworth workhorses like T600, T680, T800, and W900.
- Boost power, cooling, and reliability with top-tier components.
- Heavy-duty designs that stand up to thermal stress, vibration, and heavy loads.
- Smart upgrades to cut downtime and maintenance costs.
Shop Commercial Engine Parts at 4 State Trucks
Find the best semi truck engine parts online at 4 State Trucks. Get the performance, protection, and reliability your Kenworth deservesâwith fast shipping and expert support every mile of the way.
Frequently Asked Questions About Kenworth Truck Engine Parts
What engine models are compatible with your Kenworth engine parts?
Our Kenworth engine parts are compatible with most major engine models including Caterpillar C15, C13, and C12; Cummins ISX, X15, and N14; PACCAR MX-13 and MX-11; and Detroit DD13, DD15, and DD16. Always verify compatibility by checking your engine serial number and model year. For engines manufactured between 2007-2023, we recommend calling our tech support at 1-888-875-7787 with your VIN number for exact fitment confirmation.
Are aftermarket engine parts as reliable as OEM Kenworth parts?
Quality aftermarket parts from reputable manufacturers like Dorman, PAI, and Interstate-McBee often match or exceed OEM specifications while costing 30-50% less. These parts typically use the same materials and manufacturing processes as OEM components. However, critical engine components like injectors, turbochargers, and ECMs should be carefully evaluated. Look for parts with warranties of at least 1 year and those that meet or exceed OEM torque specifications and material grades.
What are the most common installation challenges when replacing Kenworth engine parts?
The most frequent installation issues include accessing hard-to-reach components behind the firewall, dealing with corroded or seized bolts (especially on exhaust manifolds and turbo mounting studs), and ensuring proper torque specifications are followed. Many DIY mechanics struggle with EGR cooler replacements due to coolant line routing and DPF filter installations that require ECM programming. We recommend having a factory service manual, proper torque wrenches, and considering professional installation for components requiring ECM updates or specialized tools.
How do I identify the correct part numbers for my specific Kenworth engine?
Start by locating your engine dataplate, typically found on the valve cover or engine block, which shows your engine serial number (ESN) and CPL number. Cross-reference these numbers with Kenworth parts catalogs or use our website's part finder tool. For pre-2010 models, you may need to check casting numbers on the actual parts. Keep in mind that mid-year production changes can affect compatibility, so having your truck's build date from the door jamb sticker helps ensure accuracy.
What engine parts should I keep in stock for emergency roadside repairs?
Essential spare parts include serpentine belts (especially the main drive belt), coolant hoses with clamps, fuel filters, air filters, and a complete set of sensors (coolant temp, oil pressure, and boost pressure). Also stock thermostats, EGR gaskets, and turbo clamps as these commonly fail without warning. For trucks with over 500,000 miles, consider keeping an alternator, water pump, and fuel transfer pump on hand. These parts can mean the difference between a 30-minute roadside fix and an expensive tow.
