Mazda Training manual — part 21

Powertrain Engines

Accessory Drive Belt

•

A V-ribbed drive belt is fitted to drive the engine accessories.

•

An automatic tensioner provides constant drive belt tension.

L1001.4_01069

1

Generator pulley

4

A/C compressor pulley

2

Drive belt

5

Idler pulley

3

Drive belt tensioner pulley

6

Crankshaft pulley

•

In order to check the drive belt for wear, verify that the automatic tensioner indicator
mark does not exceed the specification.

L1001.4_01070

1 Worn

3 Indicator

mark

2 Normal

Curriculum Training

01-71

Engines Powertrain

Lubrication

Features

•

The lubrication system of the RF-T engine has the following features:

–

Trochoid gear type oil pump, directly driven by the crankshaft

–

Water-cooled type oil cooler

–

Spin-on type oil filter

–

Oil jet valves

–

Mazda Dexelia DPF engine oil

Parts Location

L1001.4_01071

1 O-ring

7 Washer

2

Oil filter

8

Oil pan

3

Oil cooler

9

Oil strainer

4

Oil jet valve

10

Gasket

5

Oil pan upper block

11

Oil pressure switch

6

Oil pan drain plug

12

Oil pump

01-72 Curriculum

Training

Powertrain Engines

Engine Oil

•

For vehicles with RF-T engine and DPF (Diesel Particulate Filter), Mazda has developed
special engine oil called ‘Mazda Dexelia DPF’. This oil meets the specification ACEA C1,
and has a significantly lower ash formation than normal engine oil. As a result of its very
low ash formation in comparison to other engine oils, ‘Mazda Dexelia DPF’ guarantees
lifetime performance of the DPF.

NOTE: If other than the specified oil is used, the service life of the DPF will be shortened.

•

In general, the ash forming additives in the engine oil protect the valve train against
wear. Since oil with ACEA C1 specification has 62 % less ash forming additives than oil
with ACEA A3/B4 specification, the RF-T engines on vehicles with DPF feature a
modified valve train, ensuring durability of the engine.

NOTE: Engine oil with ACEA C1 specification must only be used for vehicles with RF-T

engine and DPF. Since other engines (diesel as well as petrol) do not feature a
modified valve train (even the Mazda6 pre-F/L and the Mazda MPV with RF-T
engine), excessive wear would occur when engine oil with ACEA C1 specification is
used, leading to severe engine damages (refer to the respective service information
for details).

Oil Dipstick

•

Since the multiple fuel injections required to regenerate the DPF can lead to an
excessively high engine oil dilution, an “X” mark has been added to the oil dipstick to
make the customer aware of this condition. If the oil level is close to or exceeds the “X”
mark, the engine oil must be replaced.

NOTE: Every time the engine oil is replaced, the parameter “Calculated oil dilution” in the

PCM must be reset (refer to the section “Service Procedures”).

L1001.4_01148

1

L mark (Low)

3

X mark (Excessive)

2

F mark (Full)

Curriculum Training

01-73

Engines Powertrain

Cooling System

Features

•

The cooling system of the RF-T engine has the following features:

–

Timing belt driven water pump

–

Unpressurized or pressurized type coolant reserve tank (depending on model)

–

FL22 longlife engine coolant

–

Cooling fan controlled by relays or by a fan control module (depending on model)

Parts Location

L1001.4_01072

Mazda5

1

Coolant reserve tank

7

Cooling system cap

2

Radiator cowling

8

Cooling system filler neck

3

Fan control module

9

Radiator

4 Cooling

fan

motor

10 Thermostat

5

Cooling fan

11

Water pump

6

Cooling fan component

01-74 Curriculum

Training