The 1.1-liter 8-valve Mazda B1 engine was assembled in Japan and Korea from 1987 to 1994 and installed in the first two generations of the compact 121 model, as well as the similar Kia Pride. In addition to the carburetor modification, there was a version with an injector on the European market.
The B-engine family includes: B1, B3, B3‑ME, B5, B5‑DE, B5‑ME, B6, B6‑ME, B6‑DE, BP, BP‑ME.
The engine was installed on:
- Mazda 121 DA in 1987 – 1991;
- Mazda 121 DB in 1991 – 1994;
- Kia Pride 1 (DA) in 1987 – 1994.
Specifications
| Production years | 1987-1994 |
| Displacement, cc | 1138 |
| Fuel system | carburetor / injector |
| Power output, hp | 50 – 55 |
| Torque output, Nm | 80 – 90 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 68 |
| Piston stroke, mm | 78.4 |
| Compression ratio | 8.6 – 9.2 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 3.0 |
| Fuel type | petrol |
| Euro standards | EURO 1 |
| Fuel consumption, L/100 km (for Mazda 121 1989) — city — highway — combined |
7.5 5.2 6.3 |
| Engine lifespan, km | ~220 000 |
| Weight, kg | 112.5 |
Disadvantages of the Mazda B1 1.1l engine
- Versions of the engine with a carburetor are difficult to set up, but most often there is already an analogue;
- Modifications with an injector are more reliable, but often suffer from floating speed;
- On specialized forums, they complain about lubricant leaks and low spark plug life;
- According to the manual, the timing belt changes every 60,000 km, however, when it breaks, the valves do not bend;
- There are no hydraulic lifters and therefore every 50 thousand km it is necessary to adjust the valves.
