Mazda Training manual — part 15

Powertrain Engines

•

In order to remove the drive belt cut it through with a knife. New drive belts are supplied
in a service kit, which also contains the SSTs (installation tool and guide tool) required
for installation (refer to the workshop manual for details).

NOTE: The SSTs in the service kit are designed for single use only.

L1001.4_01051

1

Installation tool attached to the
crankshaft pulley

3

Installation tool attached to the
crankshaft pulley (for installing the power
steering oil pump drive belt on vehicles
with A/C)

2

Guide tool attached to the generator
bracket

Curriculum Training

01-47

Engines Powertrain

Lubrication

Features

•

The lubrication system of the MZI-type engines has the following features:

–

G-rotor type oil pump, directly driven by the crankshaft

–

Spin-on type oil filter

–

No oil jet valves

Cooling System

Features

•

The cooling system of the MZI-type engines has the following features:

–

Water pump driven by the accessory drive belt

–

Pressurized type coolant reserve tank

–

Cooling fan controlled by relays

01-48 Curriculum

Training

Powertrain Engines

13B-MSP Rotary Engine

•

The 13B-MSP (Multi Side Port) rotary engine is fitted in the Mazda RX-8 models, and is
available as a standard and a high-power version. It is equipped with a manifold injection
system (two injectors per rotor on the standard power engine, and three injectors per
rotor on the high-power engine) and a distributorless ignition system (two direct ignition
coils per rotor).

Mechanical

Features

•

The mechanical system of the 13B-MSP engine has the following features:

–

Rotor housings with side intake and side exhaust ports

–

Rotors with bathtub shaped combustion chambers

–

V-ribbed belt drive with two belts and two manual tensioners

Overview

L1001.4_01114

Curriculum Training

01-49

Engines Powertrain

Construction

•

The main components of the rotary engine are the rotors, the eccentric shaft, the rotor
housings, the front, rear and intermediate housings.

•

The rotor rotates within the rotor housing, which is sandwiched between the intermediate
housing on one side, and the front or rear housing on the other, forming a sealed
chamber.

•

The eccentric shaft transfers the rotational force of the rotors to the transmission.

•

The path of the rotor within the rotor housing is determined by the internal and stationary
gears, which are phased, so that for every rotation of the rotor, the eccentric shaft
rotates three times.

L1001.4_01115

1

Internal gear

7

Spark plug bores

2

Front rotor

8

Rear rotor housing

3

Eccentric shaft

9

Intermediate housing

4

Rear rotor

10

Front rotor housing

5

Stationary gear

11

Front housing

6 Rear

housing

01-50 Curriculum

Training