Mazda R2-B – Cylinder Head Assembly (Turbocharged)

The Mazda R2-B Cylinder Head Assembly is designed for the turbocharged 2.2L diesel engine used in light commercial Mazda vehicles. This engine is an evolution of the R2 series, optimized for turbo performance and improved emissions. It features reinforced components to handle higher combustion pressures, making it ideal for utility and off-road applications.

Specifications:

• Engine Code: R2-B

• Displacement: 2.2L (2184cc)

• Engine Type: Inline 4-cylinder, turbocharged diesel

• Fuel System: Mechanically controlled injection pump

• Cylinder Head Material: Aluminum alloy (lightweight and heat-dissipating)

• Valve Configuration: SOHC – Single Overhead Camshaft

• Valves Per Cylinder: 2 (Total: 8 valves)

• Turbocharged: Yes – Compatible with factory R2B turbo systems

• Cooling System: Water-cooled

• Glow Plug Ports: Yes

• Compression Ratio: Approximately 21.0:1

• Emission Compliance: Basic EGR support (varies by market)

Included Components (may vary by assembly type):

• Intake and exhaust valves

• Valve guides and seals

• Valve springs and retainers

• Camshaft housing (if integrated type)

• Rocker arms and shafts (optional)

• Pre-installed glow plug threads and sensor ports

Applications:

The R2-B engine is commonly found in:

• Mazda Bongo / E-Series (turbo diesel variants)

• Mazda B2200/B2500 (turbo diesel variants)

• Ford Ranger (early Asian and South American markets)

• Mazda Titan (light-duty configurations)

RF-A (NON TURBO): Has smaller injectors, and the bore thread is flushed inside

RF-B (TURBO): Has bigger injectors, bore thread located just on the surface