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