Paccar MX-13 Engine Review: Specs, Reliability, and Common Issues
The Paccar MX-13 is a 12.9L inline-6 diesel engine used in Kenworth and Peterbilt trucks, offering horsepower ratings that generally range from 405 to 510 HP depending on the model...
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HD Engines is a leading supplier of quality used diesel truck engines and engine parts. With one of the most extensive inventories in the industry, we stock a full range of engines from top manufacturers including Cummins, Detroit Diesel, Isuzu, John Deere, International, Mercedes, Ford, Paccar, Volvo, Mack, and Caterpillar (CAT).
Our inventory goes beyond complete truck engines—we also carry equipment engines, industrial engines, and marine engines, ensuring solutions for both on-highway and off-highway applications.
We provide a wide selection of engine components and rebuild parts, including engine blocks, cylinder heads, ECMs, and more, making us a trusted partner for engine rebuilders, repair shops, and fleet operators nationwide.
At HD Engines, we pride ourselves on delivering reliable products, competitive pricing, and fast turnaround times. Most engines are available for same-day shipping, with flexible freight options to meet your deadlines.
Explore our full range of Caterpillar (CAT) engines available for purchase. All models are carefully inspected and listed with clear information. Browse our inventory to find a reliable CAT engine that fits your needs.
2019 CAT C4.4 Tier 4 Final Industrial Diesel Engine, Family #KPKXL04.4MU1, 174HP, 4.4L
Brand-new 2019 Perkins 1204F-E44TT A industrial diesel power unit, equivalent to the Caterpillar C4.4 engine....
New 2025 CAT C4.4 Tier 4 Final Industrial Diesel Engine Power Unit, 4.4L, 146HP
Brand-new 2025 Caterpillar C4.4 Tier 4 Final industrial diesel engine power unit for sale, engineered...
New 2019 CAT C7.1 Industrial Diesel Power Unit, AR # 425-9673, 7.01L, 275HP Tier 4 Final
BRAND NEW 2019 Caterpillar C7.1 Tier 4 Final industrial diesel power unit for sale, factory...
New 2002 CAT 3126 Diesel Engine 6PZ01342, 7.2L, 275HP, AR #151-7122 Crate Engine
BRAND NEW SURPLUS 2002 Caterpillar 3126 diesel engine for sale, factory crate engine with zero...
Explore our full range of Cummins engines available for purchase. All models are carefully inspected and listed with clear specifications and details. Browse our inventory to find a dependable Cummins engine that meets your performance and application requirements.
2000 Cummins 4BT 3.9L Diesel Power Unit, Family #YCEXL0239ABA, 110HP, CPL 2302
Run-tested and fully inspected 2000 Cummins 4BT 3.9L diesel power unit, built for reliable industrial...
2020 Cummins QSB6.7 Industrial Diesel Engine, Tier 4 Interim, CPL 3098, 173HP, CM2250
2020 Cummins QSB6.7 industrial diesel engine built for dependable equipment performance. Features Tier 4 interim...
2015 Cummins QSB4.5 Industrial Diesel Engine, Tier 3, 130HP, CPL 8755, CM850
Brand-new 2015 Cummins QSB4.5 industrial diesel crate engine with 0 hours, built to Tier 3...
2018 Cummins X15 EPA17 Diesel Engine 80118795, 15.0L, 450HP, CPL 4342
Run-tested and fully inspected 2018 Cummins X15 EPA17 diesel engine for sale, featuring CPL 4342...
2012 Detroit DD15 Diesel Engine, EPA10, Family #CDDXH14.8EED, 560HP, 14.8L
Good used 2012 Detroit DD15 diesel engine, run tested and fully inspected for dependable performance....
2023 OEM remanufactured Detroit Series 60 14.0L DDEC VI EPA07 diesel engine for sale, professionally...
2018 Detroit DD15 EPA17 Diesel Engine, JDDXH14.8EAD, 14.8L, 505HP
Run-tested and fully inspected 2018 Detroit DD15 EPA17 diesel engine for sale, delivering 505HP from...
2017 Detroit DD15 Diesel Engine, KDDXH14.8EAD, 14.8L, 505HP EPA17
2017 Detroit DD15 EPA17 diesel engine for sale. Engine Serial #472910S0524248, Engine Family #HDDXH14.8EAD, featuring...

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The Paccar MX-13 is a 12.9L inline-6 diesel engine used in Kenworth and Peterbilt trucks, offering horsepower ratings that generally range from 405 to 510 HP depending on the model...
The Detroit DD15 comes in several horsepower ratings, from 400 hp up to 505 hp, with torque ranging from 1,250 to 1,750 lb-ft. The 505 hp rating is the most...
The most common Detroit DD15 engine problems are EGR cooler failure, aftertreatment and DEF system faults, turbocharger actuator issues, oil leaks from the front cover and turbo, fuel injector wear,...