Engine Overhaul Rebuild Kit | Isuzu 3KR1 Engine / Hitachi Excavator EX22 EX25

Restore the full performance of your Hitachi mini excavator with this premium Engine Overhaul Rebuild Kit for the Isuzu 3KR1 engine. Designed to meet and exceed OEM standards, this comprehensive kit includes every critical internal engine component required for a reliable and long-lasting rebuild. The Isuzu 3KR1 is known for its efficiency and smooth operation in compact applications such as the Hitachi EX22 and EX25 excavators. Over time, natural wear leads to loss of compression, smoking, hard starting, and reduced power. This overhaul kit brings your engine back to peak performance with high-precision matched components. Each part is manufactured using heat-treated materials, CNC machining, and strict quality control to guarantee perfect fit and long service life—even in harsh construction environments. Whether you’re rebuilding an engine due to low compression, oil burning, or complete overhaul needs, this kit ensures a dependable repair solution. Kit Components ✔ Pistons (Standard / Oversize options)✔ Piston Rings✔ Cylinder Liners (Dry/Wet depending on model)✔ Full Gasket Set✔ Main Bearings✔ Connecting Rod Bearings✔ Thrust Washers✔ Valve Stem Seals✔ Wrist Pin Bushings✔ Seals & O-rings Compatibility Engine: Isuzu 3KR1 Machines: Hitachi EX22 Excavator Hitachi EX25 Excavator Other 3KR1-powered small equipment Why Choose Our 3KR1 Overhaul Kit? OEM-grade material quality Precision-machined components High temperature and wear resistance 100% compatibility guaranteed Improves compression, fuel efficiency & power output Suitable for full engine restoration projects Frequently Asked Questions Q: Is this overhaul kit compatible with all Isuzu 3KR1 engines? Yes, the kit is designed specifically for the Isuzu 3KR1 engine and fits all machine models using this engine, including Hitachi EX22 and EX25. Q: Does the kit include the complete gasket set? Yes, a full gasket set is included, covering the cylinder head, lower block, seals, and O-rings required for a complete rebuild. Q: Are oversize pistons and bearings available? Yes, standard and oversize (0.25 / 0.50) pistons and bearings can be provided based on your engine block condition. Q: What symptoms indicate my 3KR1 engine needs overhaul? Common signs include low compression, heavy smoke, oil consumption, knocking sound, and difficulty starting. Q: Are these parts OEM or aftermarket? The parts are high-quality OEM-spec aftermarket components that match factory tolerances and durability standards.       For Hitachi Excavator EX22 EX25 Isuzu Engine 3KR1 Overhaul Rebuild Kit Engine Model: ISUZU 3KR1 Engine Machine Model: HITACHI Application: EX22,EX25 SKU: 3KR1-IEK Categories: 3KR1, Engine Rebuild Kit Tags: diesel engine parts, Engine Overhaul Kit, Hitachi EX22, Hitachi EX25, Mini Excavator Parts, Rebuild Kit