Mazda Training manual — part 12

Powertrain Engines

Camshafts

•

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

•

The intake camshaft is equipped with an oil line supplying oil to the camshaft actuator of
the variable valve timing system.

•

The intake camshaft has a pulse wheel for the CMP sensor signals.

Valve Train

•

The valve train is similar to that of the L-type engines. In addition, the procedure for
releasing the timing chain tension is the same as on the L-type engines.

L1001.4_01032

1

Camshaft sprocket

6

Inner plate

2

Timing chain

7

Chain guide

3 Pin

8 Crankshaft

sprocket

4

Guide plate

9

Chain tensioner

5

Middle plate

10

Chain tensioner arm

Curriculum Training

01-35

Engines Powertrain

Valve Timing

•

For verifying or adjusting the valve timing, the crankshaft sprocket key has to be aligned
with the timing mark on the oil pump housing.

L1001.4_01034

1

Timing mark

2

Crankshaft sprocket key

•

For verifying or adjusting the valve timing, the timing marks on the camshaft sprockets
have to be aligned, so that they form a straight line with the upper horizontal surface of
the cylinder head.

L1001.4_01035

1

Timing marks

2

Cylinder head upper surface

01-36 Curriculum

Training

Powertrain Engines

Lubrication

Features

•

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

–

Trochoid gear type oil pump, directly driven by the crankshaft

–

Water-cooled type oil cooler (depending on model)

–

Spin-on type oil filter

–

Oil jet valves

Parts Location

L1001.4_01038

1

Oil jet valve

7

Oil pan

2

With oil cooler

8

Washer

3

O-ring

9

Oil pan drain plug

4

Oil cooler

10

Oil pump

5 Oil

filter

11 Gasket

6

Oil pressure switch

12

Oil strainer

Curriculum Training

01-37

Engines Powertrain

Cooling System

Features

•

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

–

Water pump driven by the accessory drive belt

–

Pressurized type coolant reserve tank

–

FL22 longlife engine coolant

–

Cooling fan with cooling fan motor and integrated fan control module

Parts Location

L1001.4_01039

1

Coolant reserve tank

5

Radiator cowling

2

Cooling system cap

6

Cooling fan motor with fan control
module

3

Water pump

7

Cooling fan

4 Thermostat

8 Radiator

01-38 Curriculum

Training