Mazda Training manual — part 23

Powertrain Engines

Overview

L1001.4_01073

NOTE: Some of the components of the WL-C 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.

Curriculum Training

01-79

Engines Powertrain

Balancer Shafts

•

The balancer shafts are directly fitted into the cylinder block. The crankshaft drives the
balancer shafts via helical gears.

L1001.4_01135

1

Balancer shaft gears

2

Balancer shaft

01-80 Curriculum

Training

Powertrain Engines

Cylinder Head

•

The cylinder head features a bolted on camshaft bearing frame, which can be replaced
separately.

•

The cylinder head gasket is available in three different thicknesses depending on the
piston protrusion. The gasket is marked respectively (refer to the workshop manual for
details).

•

The cylinder head bolts are torque-to-yield bolts, which must be tightened in several
stages (refer to the workshop manual for details).

NOTE: The cylinder head bolts must not be re-used if their length exceeds the specification

(refer to the workshop manual for details).

L1001.4_01076

1

Camshaft bearing caps

4

Camshaft bearing frame

2 Camshafts

5 Cylinder

head

3

Injector sealing ring

6

Engine front side

Curriculum Training

01-81

Engines Powertrain

Camshaft

•

The camshafts are equipped with a pin for the installation of the camshaft pulleys.

•

The camshaft pulleys for the intake and exhaust camshaft are identical. A letter (“I” for
intake and “E” for exhaust) on the camshaft pulleys indicates the installation position, i.e.
the letter on the camshaft pulley must be aligned with the pin on the camshaft.

L1001.4_01141

1

Intake camshaft pulley

3

Exhaust camshaft pulley

2 Pin

01-82 Curriculum

Training