From 1983 to 2007, the Mazda R2, a 2.2-liter prechamber diesel engine, was manufactured and used in numerous commercial vehicles sold under the Mazda, Kia, and Ford brands. This power unit was given a new R2AA index following the installation of the Common Rail system.
RF and RF-T Di diesel engines are also members of the R-engine family.
The engine was mounted on:
- Mazda Bongo 3 in 1983 – 1999;
- Mazda Bongo 4 (SG) in 1999 – 2007;
- Mazda B-series in 1985 – 1993;
- Mazda E-series in 1983 – 2007.
Specifications
| Production years | 1983-2007 |
| Displacement, cc | 2184 |
| Fuel system | prechambers |
| Power output, hp | 70 – 79 |
| Torque output, Nm | 138 – 142 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 94 |
| Compression ratio | 22.9 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.5 |
| Fuel type | diesel |
| Euro standards | EURO 1/2 |
| Fuel consumption, L/100 km (for Mazda Bongo 2000) — city — highway — combined |
9.2 6.4 7.4 |
| Engine lifespan, km | ~320 000 |
| Weight, kg | 190 |
Disadvantages of the Mazda R2 2.2 engine
Huge mileage is linked to all of this straightforward and dependable diesel engine’s issues;
The aluminum cylinder head is the unit’s weakest point;
There are 200,000 km of cracks surrounding the prechambers, and purchasing a new cylinder head is difficult;
Since there are no hydraulic lifters, the valves must be adjusted every 100,000 kilometers. The timing belt is intended to last 60,000 kilometers, and when it breaks, the valve typically bends.