Piston | Isuzu 4JB1 4JB1T Engine

The Piston for Isuzu 4JB1 / 4JB1T Engine is engineered with precision to ensure maximum engine efficiency, power, and reliability. Designed to meet or exceed OEM standards, this piston maintains optimal compression and combustion, resulting in smoother operation and longer engine life.

Constructed from high-strength aluminum alloy, it offers superior heat resistance and durability under high-load conditions. The piston design ensures efficient sealing, reduced friction, and improved fuel combustion — essential for achieving consistent engine performance.

Whether you’re performing a full rebuild or replacing worn components, this piston is the ideal OEM-spec replacement for Isuzu trucks, light commercial vehicles, and industrial machinery powered by the 4JB1 or 4JB1T diesel engines.

⚙️ Key Features:

• Engine Compatibility: Isuzu 4JB1 / 4JB1T

• Material: High-strength aluminum alloy

• Ensures optimal compression and combustion efficiency

• Reduces oil consumption and blow-by gases

• OEM-standard dimensions and clearances

• Excellent heat dissipation and wear resistance

• Precision-machined for perfect cylinder fitment

• Ideal for Isuzu diesel trucks and construction equipment

• Long service life and reliable performance

🚘 Compatible Applications:

• Engine Models: Isuzu 4JB1, Isuzu 4JB1T

• Vehicle Models:

  • Isuzu NKR / NHR / NPR

  • Isuzu ELF Series

  • Light commercial vehicles, trucks, and pickups

  • Industrial and construction equipment (e.g., loaders, generators)

• Fitment Type: OEM-standard direct replacement

• Function: Maintains compression and combustion performance in diesel engines

Piston | Isuzu 4JB1 4JB1T Engine

OE Replacement: 5-12111-622-2, 5121116222

Fits Following: Isuzu NHR / 4JB1 2.8L / 4JB1T 2.8L | Diameter: Pin=34mm

Year: 2006-2014