Description

Polaris Ranger 400 Engine Remanufacturing (2005-2014 Models)

The Polaris Ranger 400 has earned its reputation as a dependable workhorse in the powersports world. When these engines start getting tired, riders want something that brings back that original torque while adding long-term reliability. That’s exactly what this rebuilt 2005–2014 Ranger 400 engine is designed to do. Our Master builders follow old-school craftsmanship, yet they also lean into modern machining and updated parts so the finished engine runs stronger and stays healthier longer.

Every unit goes through a hands-on teardown, a deep inspection, and a full cleaning process. Because we build engines every day, we know where the common wear points show up, and we address them right away. The result is a remanufactured engine that’s built for real-world ranch work, trail duty, and everything in between. And since riders often ask about reliability, you’ll find quick answers inside our helpful tech resources in the FAQ section.

Additionally, customers who want to understand coverage options can review our warranty details. If you’re new to shipping cores or want to see how our exchange works, the Help Center gives a clear step-by-step look. And for riders who enjoy digging into engine talk, our blog articles break down upgrades, tuning habits, and powersports maintenance tips.

THIS SERVICE INCLUDES

• Standard No-Fault 1-year warranty with an optional 2-year No-Fault Warranty upgrade.
• We restore and reuse as many OEM parts as possible. We inspect and refurbish all OEM parts to guarantee high-quality internals that keep your machine running reliably.
• All components are cleaned, dismantled, inspected and repaired as needed.
• Cylinder head inspected, cleaned, sandblasted, decked, rebuilt to manufacturer spec and undergoes a quality inspection.
• Exhaust valve guide replaced with manganese bronze valve guides for high RPM performance.
• Intake valve guides inspected and replaced as needed.
• Valves and valve seats are recut/refaced to ensure a tight seal, verified with a vacuum test.
• Camshafts, lobes, and journals cleaned and polished, replaced as needed.
• Refurbished crankshaft.
• Cylinder is inspected for damage, bored and honed to the next oversize, or replaced.
• Piston replaced with a new moly-coated piston and rings.
• Timing chain inspected for stretch and wear, replaced as needed.
• Refurbished oil pump assembly.
• Fully inspected engine cases, tested for cracks, holes, or excessive wear.
• All gaskets and seals replaced.
• Engine assembled and torqued to manufacturer specifications.

ENGINE CORE REQUIREMENTS

Send your original engine core or pay a refundable $500 core charge. If your core meets inspection standards, you’ll receive a full refund. Need the rebuilt engine shipped before sending your core? You can review our core exchange program for more info. 

FITMENT

Polaris Ranger 400
2005–2014 models

TAKE ACTION

If your Polaris Ranger is ready for fresh power, a rebuilt engine brings it back to life with upgraded internals and trusted durability. We offer nationwide shipping, so getting started is easy no matter where you ride or work.

Have questions? Feel free to reach out through our contact page, and we’ll help you get your order moving.

Veterans and active servicemembers qualify for special discounts — thank you for your service.