Engine Mazda RF 2.0l

The Mazda RF 2.0-liter pre-chamber diesel engine was produced from 1983 to 2003 in a huge number of modifications: both atmospheric RF-N and turbocharged RF-T. There was also an updated version of the RF1G for the 323 models and a compressor RF-CX for the 626.

The R-engine family also includes diesel engines: RF-T Di and R2.

The engine was installed on:

  • Mazda 323 BH in 1995 – 1998;
  • Mazda 323 BJ in 1998 – 2000;
  • Mazda 626 GC in 1983 – 1987;
  • Mazda 626 GD in 1987 – 1991;
  • Mazda 626 GE in 1991 – 1997;
  • Mazda Bongo 3 in 1984 – 1995;
  • Kia Concord in 1988 – 1991;
  • Kia Sportage 1 (JA) in 1998 – 2003;
  • Suzuki Vitara 1 (ET) in 1994 – 1998;
  • Suzuki Vitara GT in 1998 – 2003.

Specifications

Production years 1983-2003
Displacement, cc 1998
Fuel system prechambers
Power output, hp 58 – 67 (RF-N, RF46)
71 (RF1G)
76 – 88 (RF-CX)
71 – 92 (RF-T)
Torque output, Nm 120 (RF-N, RF46)
128 (RF1G)
172 – 186 (RF-CX)
172 – 195 (RF-T)
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 86
Piston stroke, mm 86
Compression ratio 21 – 23 (RF-N, RF46)
21.7 (RF1G)
21.1 (RF-CX)
19 – 21 (RF-T)
Features SOHC
Hydraulic lifters no
Timing drive belt
Phase regulator no
Turbocharging no (RF-N, RF46)
no (RF1G)
compressor (RF-CX)
yes (RF-T)
Recommended engine oil 5W-30
Engine oil capacity, liter 5.0 (RF-N, RF46)
5.0 (RF1G)
5.5 (RF-CX)
5.5 (RF-T)
Fuel type diesel
Euro standards EURO 0 (RF-N, RF46)
EURO 2 (RF1G)
EURO 1 (RF-CX)
EURO 1/2 (RF-T)
Fuel consumption, L/100 km (for Mazda 626 1990)
— city
— highway
— combined
8.1
5.4
6.3
Engine lifespan, km ~300 000
Weight, kg 187

Disadvantages of the Mazda RF 2.0 engine

  • These are simple and reliable diesel engines, most of their problems are due to old age;
  • Leaks are most often discussed on specialized forums, the unit sweats oil over the cylinder head gasket;
  • According to the regulations, the timing belt is changed every 60,000 km, or if it breaks, the valve will bend;
  • After 200-250 thousand km of run, cracks around the prechambers are often found;
  • There are no hydraulic lifters and do not forget to adjust the valves every 100,000 km.

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