Crankshaft | Isuzu 4BD1 / 4BD2 Engine

The Crankshaft for Isuzu 4BD1 / 4BD2 Engine is a high-precision OEM-quality replacement part engineered for maximum durability and balance. Designed to meet or exceed original factory specifications, it ensures optimal engine performance, smoother operation, and extended service life.

Made from forged, heat-treated steel, this crankshaft provides superior strength and resistance to wear, fatigue, and torsional stress — making it ideal for heavy-duty NPR trucks, industrial machinery, and turbocharged applications.

Each unit is precision-ground, dynamically balanced, and quality-tested to ensure consistent oil clearance, smooth rotation, and perfect fitment with OEM bearings.

Key Features:

• OEM-spec replacement for Isuzu 4BD1 / 4BD2 engines

• Forged, heat-treated steel construction for maximum strength

• Precision-ground journals for perfect bearing fit

• Dynamically balanced to reduce vibration and wear

• Suitable for diesel truck and industrial use

• Resists wear, cracking, and oil pressure issues

Applications:

• Isuzu NPR / NQR Trucks

• Industrial equipment and generators powered by 4BD1 or 4BD2 engines

• 1980s–1990s Isuzu 4BD-series diesel engines

Benefits:

• Restores engine balance and power output

• Reduces vibration and bearing wear

• Extends engine life and reliability

• Ensures smoother operation and performance

• Perfect for rebuilds, repairs, or performance upgrades

Crankshaft | Isuzu 4BD1 / 4BD2 Engine

Fits: 4BD1 / 4BD2

Replacements: 5-12310-163-0, 5123101630