The 2.0-liter Mazda RF7J diesel engine was produced by the company from 2005 to 2010 and was installed on the European versions of the popular models of the third, fifth or sixth series. This power unit was essentially a modernized version of the well-known RF5C diesel engine.
MZR-CD family: RF5C, RF7J, R2AA.
Specifications
| Production years | 2005-2010 |
| Displacement, cc | 1998 |
| Fuel system | Common Rail |
| Power output, hp | 110 – 145 |
| Torque output, Nm | 310 – 360 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 86 |
| Compression ratio | 16.7 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | IHI VJ36 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.8 |
| Fuel type | diesel |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Mazda 6 2006) — city — highway — combined |
7.5 5.1 6.0 |
| Engine lifespan, km | ~280 000 |
| Weight, kg | 197 |
The engine was installed on:
- Mazda 3 BK in 2006 – 2009;
- Mazda 5 CR in 2005 – 2010;
- Mazda 6 I (GG) in 2005 – 2007, 6 II (GH) in 2007 – 2008.
Disadvantages of the Mazda RF7J engine
- Most of the problems are caused by burnouts of the sealing washers under the nozzles.
- Often the return flow of the nozzles also flows, which leads to the mixing of the lubricant with the fuel.
- The main source of oil leaks are cracks in the intercooler flanges.
- During the burning of the particulate filter, diesel fuel can also enter the oil here.
- Other weaknesses in the engine include: SCV valve in the high pressure fuel pump, vacuum pump and mass air flow sensor.
Frequently asked questions about the Mazda RF7J
How much power does the Mazda RF7J make?
The Mazda RF7J develops 110 - 145 hp and 310 - 360 Nm of torque.
How much oil does the Mazda RF7J take and which one?
Engine oil capacity: 4.8 liters. Recommended oil: 5W-30.
Does the Mazda RF7J have a timing belt or chain?
The Mazda RF7J uses a timing belt.
Is the Mazda RF7J turbocharged?
Yes, the Mazda RF7J is turbocharged (IHI VJ36).
Does the Mazda RF7J need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Mazda RF7J last?
The typical lifespan of the Mazda RF7J is ~280 000 km with proper maintenance.
What is the fuel consumption of the Mazda RF7J?
Mazda 6 2006: city 7.5, highway 5.1, combined 6.0 L/100 km.
What cars was the Mazda RF7J installed on?
Mazda 3 BK in 2006 - 2009; Mazda 5 CR in 2005 - 2010; Mazda 6 I (GG) in 2005 - 2007, 6 II (GH) in 2007 - 2008.
What are the common problems of the Mazda RF7J?
Most of the problems are caused by burnouts of the sealing washers under the nozzles. Often the return flow of the nozzles also flows, which leads to the mixing of the lubricant with the fuel. All known problems.
Hola me gustaría saber el tipo de refrigerante que debo poner en mi Mazda 6 GG rf7j. Soy de Portugal. Y sobre la válvula de pcv o decantador de aceite, evitar tanto aceite en el sistema de admisión.
Hello, I’d like to know what type of coolant I should use in my Mazda 6 GG RF7J. I’m from Portugal. And regarding the PCV valve or oil decanter, I want to avoid too much oil in the intake system.