Mazda Training manual — part 25

Powertrain Engines

Valve Timing

•

For verifying or adjusting the valve timing of the gear drive the timing marks have to be
aligned as shown below (refer to the workshop manual for details).

•

All helical gears except for the fuel high-pressure pump gear have a punch mark as
timing mark. However, the punch marks on the crankshaft gear and on the fuel-high-
pressure pump gear can only be seen when the friction gears are removed.

NOTE: The timing mark of each gear can be aligned easily, if paint is applied to the punch

marks.

L1001.4_01082

1

Fuel high-pressure pump gear

5

Balancer shaft gear

2

View A

6

Crankshaft gear

3

Timing mark

7

Idler gear no.1

4

Idler gear no.3

8

Idler gear no.2

Curriculum Training

01-87

Engines Powertrain

•

For verifying or adjusting the valve timing of the belt drive, the timing marks have to be
aligned as shown below (refer to the workshop manual for details).

L1001.4_01081

1

Timing marks (camshaft pulleys)

2

Timing mark (crankshaft pulley)

01-88 Curriculum

Training

Powertrain Engines

Accessory Drive Belt

•

Three V-drive belts are fitted to drive the engine accessories, i.e. two belts drive the
generator and one belt drives the A/C compressor.

•

The drive belt tension can be adjusted via two manual tensioners (refer to the workshop
manual for details).

NOTE: The belt deflection has to be checked when the engine is cold, or at least 30 minutes

after the engine has been switched off.

L1001.4_01083

1

Measuring point

5

Drive belt(s)

2

Locknut

6

Crankshaft pulley

3

Adjusting screw

7

Water pump pulley

4

Generator pulley

8

A/C compressor pulley

Curriculum Training

01-89

Engines Powertrain

Lubrication

Features

•

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

–

Gear type oil pump, directly driven by the crankshaft

–

Water-cooled type oil cooler

–

Spin-on type oil filter

–

Oil jet valves

Parts Location

L1001.4_01084

1

Oil pump

7

Oil filter

2

Oil jet valve

8

Oil pan

3

Oil pressure switch

9

Oil pan drain plug

4

Oil cooler

10

Oil strainer

5

Oil filter body

11

Oil outlet pipe

6

Oil cooler and oil filter body component

12

Oil dipstick

01-90 Curriculum

Training