4BG1 / 4BG1T Engine Rebuild Overhaul Kit for Hitachi, Kobelco, JCB Excavators

Heavy-Duty Engine Restoration Kit

When hydraulic excavators work under heavy duty environments, cylinder pressure and high thermal loads can rapidly wear down the piston rings, liners, and seals of your Isuzu 4BG1/4BG1T engine.

Our Premium Aftermarket Major Overhaul Kit is engineered using high-strength alloy materials and premium elastomeric seals to guarantee perfect compression recovery and dynamic balance, drastically reducing expensive machine downtime.

Comprehensive Packing List (What’s Included)

This complete rebuild package includes all high-precision parts required for a top-to-bottom block restoration:

• Cylinder Liners (Chromed / Semi-finished) x 4

• Pistons (STD) x 4

• Piston Pins x 4

• Snap Rings x 8

• Piston Ring Set (for 4 Pistons) x 1 Set

• Rod Bushings x 4

• Full Overhaul Gasket Kit (with MLS Head Gasket) x 1 Set

• Main Bearings Set (STD) x 1 Set

• Con Rod Bearings Set (STD) x 1 Set

• Thrust Bearings Set x 1 Set

Q1: How do I choose between the 3-ring and 4-ring groove piston options for my Isuzu 4BG1/4BG1T engine?

A: It depends entirely on your original engine configuration. Naturally aspirated Isuzu 4BG1 engines often use a different piston crown and ring arrangement compared to high-pressure 4BG1T turbocharged versions. Before finalizing your order, please check your old piston design or provide your engine serial number to our support team to match the exact ring groove profile.

Q2: What payment methods are accepted for global orders?

A: We provide a fully secure, frictionless B2B checkout experience. We accept all major international payment networks including American Express, Mastercard, PayPal, and Shop Pay, alongside mobile-first wallets like Apple Pay and Google Pay for instant processing.

Q3: Does this kit include the intake and exhaust valves?

A: This standard major rebuild kit includes the complete block rotating assembly (liners, pistons, rings, bearings) and the full sealing gasket set. If your cylinder head requires a complete valvetrain refresh (Intake/Exhaust valves, guides, and seats), please contact us via the enquiry channel to upgrade your package.