The 2.2-liter prechamber diesel engine Mazda R2 was produced from 1983 to 2007 and was installed on a large number of commercial vehicles under the brands Mazda, Kia, Ford. After being equipped with the Common Rail system, this power unit received a new R2AA index.
The R-engine family also includes diesel engines: RF and RF‑T Di.
The engine was installed 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
- All the problems of this simple and reliable diesel engine are associated with huge mileage;
- The weakest point of the unit is the aluminum cylinder head;
- Cracks around the prechambers are formed by 200,000 km, and it is not easy to buy another cylinder head;
- The timing belt is designed for 60 thousand km, and when it breaks the valve most often bends;
- Since there are no hydraulic lifters, the valves will have to be adjusted every 100,000 km.
