[terrawombat]

I figured I would sign up on here and post what information I have on the Mazda RF diesel I picked up back in April.

I purchased the engine from this vendor: Mazda Bongo Brawny 2 0L Turbo Diesel Engine Transmission Harness ECU JDM RF | eBay

The transaction was smooth and I was able to get it for slightly less than they are asking on eBay because I went to their warehouse and dealt in cash. Unfortunately, they were not very helpful when it came to obtaining information, but that's okay since I didn't really expect them to know anything more than what they posted in their eBay ad.

I was able to backtrack the PN on my ECM and found that it is from either a 2004 or 2005 Mazda Bongo or possibly a Nissan Vanette. From what I can tell this particular engine/transmission configuration was only found in the 2003+ Mazda Bongo. As a front engine, longitudinal mount RWD (or 4WD), Mazda refers to it as the RF-CDT. This engine is also found in many passenger vehicles in Europe (and possibly Japan), but it is referred to as the MZR-CD (front engine, transverse mound FWD). Mechanically the engine is just about identical between the RF-CDT and MZR-CD, but the electronics are quite different. For one, they do not share the same ECM. The front-wheel-drive passenger vehicles have a sentry key immobilizer built into the ECM, but the RF-CDT I have does not (thank god). There are also some other subtle differences in the electronics that I have found from the service manuals I have been able to obtain for the European passenger cars that have this motor (Mazda 3, 6, MPV).

I searched high and low for a service manual for the RF-CDT and ultimately was only able to get my hands on a Russian manual, which I am in the process of translating. I have been able to get many of the engine wiring diagrams translated and sorted out and I have the engine up and running on a test stand. It's a drive-by-wire engine so I have no control over engine RPM.

Here are all of the pictures I have:














Video of the engine running:

 

[zaib75]

terrawombat

thanks a lot for explanation

 

[chief tool]

Interesting find.

I never knew that engine existed.

 

[zaib75]

Hi chief i visited that junkyard again but didnt had time to reply here
I was wrong about R2 turbo those were RT and RF engines
Now i need info about RF engine max power, torque etc and will it bolt on fit in mazda b2200

 

[chief tool]

Which version of the RF ? i.e year ?

I assume your talking about the indirect injection type not the one terrawombat discovered. In which case there was the non turbo RF, non intercooled turbo and intercooled turbo version.

Somewhere along the way Mazda changed from mechanical injector pump to ones with the electronic spill valve. I think it was the mid 90s, with these you need all the sensors and the ECU to make it work.

All sold in the 90s in various models B2000, Bongos and Suzuki Vitara/Escudo models.

Physical fitment should be pretty much the same barring a few wires and minor items

 

[zaib75]

It has mechanical pump and I have no idea about year
Also its without turbo . Inter cooler

 

[chief tool]

In which case it is probably very similar to the motor that is in my 626 diesel; 49kW and 127NM. It is a non turbo with a mechanical IP.
To put things in perspective, it goes about as well as a 1.6 petrol around the same design age, but you don't have to rev it as hard and the fuel usage is about 2/3.

 

[zaib75]

49kw and 127 nm but also mention rpm range
Will it be a bolt on swap for my mazda also tell me that how many kms it does in a liter

 

[chief tool]

It varies depending on the injection pump fuel curve.

Mine is an early model and the torque is at 2000rpm but in later models it was increased to 2750rpm and the gearing changed to suit.
The power is theoretically at 4000rpm but I have never taken my engine that high.

Whether it will be a bolt in swap depends on what motor is in your B2200 now, is it powered by a R2 or an F2 (i.e diesel or petrol) If you are replacing an R2 it should be a drop in replacement. if you are converting from petrol you will need to change a few things like the gearbox bell housing.

My thoroughly worn engine gives me about 6L/100Km on the highway and 7L/100 around town. I've heard other people get better than I do.....could also be the way I drive too!

 

[zaib75]

It had R2 under the hood but replaced it with toyota 3sfe but I'm not satisfied with its fuel average
I'm getting 8 to 10 km/l
when I had bought my mazda I didn't drive R2 because it was in worst condition
Now a days market is flooded with Mazda engines like S2 . R2 .RF and RT all parts are available here
Now what I have to swap R2 or RF?
Also tell me R2 fuel average too

 

[chief tool]

You would need to convert it back to how it was when the R2 was in there.

I am not sure what the fuel economy of the R2 is like having never had a vehicle with one installed. I would expect similar to the RF.
The RF turbo seems to have better fuel economy than either and some more power so would be a better choice if you are going to the effort of the engine swap.

 

[zaib75]

I also wanna buy RF T but I'm little afraid about turbo internal condition . I mean its on luck I could get a better condition turbo or worn.
R2 . RF and RFT all engine prices are same even their condition looks good but who knows what's inside.

All engines are black top but is it possible to know that are they early ones or late models
One more question does R2 and RF share same connecting rods and crank

Also elaborate thermostat valve position I can't recognise in your previous posts on 1 page please mark with red circle

 

[chief tool]

Yes, this is always the risk buying used engines.

RF & R2 have a different stroke length so use different rods and crank.

Its hard for me to add that edit now, but the photo showing the R2 from the alternator side, you can see the thermostat housing poking out in front of the timing cover.

Later models it is near #1 injector.

Whether the motor is worn or not will have less to do with its age and more how well it was treated.

You can gauge an idea of how worn a turbo is by lateral shaft play.
I know the HT10-9 works hard on these motors so will wear on high mileage models.
The blades should not touch the housing, also look for traces of oil in the compressor and exhaust housings.

The pics of mine show no oil, but it did have a lot of shaft play - still useable but worn.
You can buy rebuild kits for them, but they can be hard to find.

 

[zaib75]

Any power difference between early and later R2 engine and do they both have same injectors ?

 

[zaib75]

after searching a lot on net what i found is here
R2 was used in mazda/kia trucks bongo, besta vans etc but i was unable to find its exact power
@Chief plz check these links
Asia - Rocsta - 2.2 D 4x4 (61 Hp) - Technical specifications, Fuel economy (consumption)

Kia - Sportage (K00) - 2.2 D (5 dr) (63 Hp) - Technical specifications, Fuel economy (consumption)

Kia Besta 2.2D state of emergency ** WATCH ** 1999 Other vans/trucks up to 7,5t Photo and Specs

Mazda Bongo Van 2.2 GL low floor diesel 4WD (06.1999 - 07.2002)

MAZDA Bongo Van (3 seats) 2.2D (79Hp) technical data. Power. Torque. Fuel tank capacity. Fuel consumption. Load capacity.

 

[chief tool]

The figures for the Mazda versions are believable and are similar to those I have seen before for the R2.
The Kia versions seem be detuned compared with the Mazda, this might have something to do with the emissions standards of where they were to be sold.

The later R2 engine also had an electronic spill valve in the IP, this might be how Mazda was able to get reasonable power and still meet the emission standard of the day. I don't know whether the Kia version of the motor used an IP with an electronically controlled spill valve or whether it was 100% mechanical.

The injectors in a diesel engine such as this don't have anything to do with how much power is made. Most of the variations will be to do with the injector pump fuel curve & timing and a little bit about the valve timing.

 

[zaib75]

Today I was in market and I bought a Mazda R2 .
RF and RT were available but I decided to buy R2 , there were some silver top too but not in good condition.
It's early model engine and in good condition.
chief please tell me where is engine number on block and R2 is clearly written on front plastic cover
Its midnight here so I can't capture photos I'll post tomorrow

 

[chief tool]

should be below #1 injector

 

[zaib75]

Here are the photos
Its dirty but internal condition is superb and compression tested

 

[Fastest95PGT]

Here are the photos
Its dirty but internal condition is superb and compression tested

That's an interesting intake manifold.