Mazda Training manual - part 26

Powertrain Engines 

Cooling System 

Features 

• 

The cooling system of the WL-C engine has the following features: 

– 

Water pump driven by the accessory drive belts 

– 

Unpressurized type coolant reserve tank 

– 

FL22 longlife engine coolant  

– 

Thermo-modulation type cooling fan 

 

Parts Location 

 

L1001.4_01085 

 

1 

Cooling system cap 

5 

Water pump 

2 

Radiator cowling 

6 

Cooling fan 

3 

Water pump pulley 

7 

Coolant reserve tank 

4 Thermostat 

8 Radiator 

 

Curriculum Training 

01-91 

Engines Powertrain 

Service Procedures  

MAF Sensor Learning Function 

• 

The MAF learning function is used to compensate the deviations of the amount due to 
measured intake air deterioration of the MAF sensor. It has to be carried out at specified 
service intervals by means of M-MDS. During this procedure the MAF learning function is 
performed at engine speeds of 750 min

-1

, 1850 min

-1

, and 2500 min

-1

. To perform the 

procedure select the option Toolbox

ÆPowertrainÆEngine ChecksÆLearning and 

follow the instructions of M-MDS.  

 
 
 

01-92 Curriculum 

Training 

Powertrain Engines 

Y-type Engines 

• 

In the Y-type engine line-up the following engines are available:  

– 

Y4 type with 1.4 L displacement (also termed as 1.4 MZ-CD engine) 

– 

Y6 type with 1.6 L displacement (also termed as 1.6 MZ-CD engine) 

 
• 

The Y4 engine is fitted in the Mazda2 (DY) models. It is equipped with a common rail 
direct injection system and a FGT turbocharger  

• 

The Y6 engine is fitted in the Mazda3 models, and is available as a standard and a high-
power version. It is equipped with a common rail direct injection system and a 
turbocharger (FGT turbocharger on the standard power engine, and VGT turbocharger 
on the high-power engine). 

 

Mechanical (Y4 Engine) 

Features 

• 

The mechanical system of the Y4 engine has the following features: 

– 

Belt driven 8 valve SOHC engine 

– 

Valve train with automatic timing belt tensioner, roller cam followers and hydraulic 
tappets 

– 

Vacuum pump driven by the camshaft 

– 

V-ribbed belt drive with automatic tensioner 

 

Curriculum Training 

01-93 

Engines Powertrain 

Overview 

 

L1001.4_01086 

 

NOTE:  Some of the components of the Y4 engine are very similar in construction and 

operation to those of the RF-T engine. Therefore, this section only describes the 
components which are new or differ from those of the RF-T engine. 

 

01-94 Curriculum 

Training