Mazda 13B-MSP Technical Information download pdf (Page 24)

Engines Powertrain

Valve Actuation

• The camshafts actuate the valves via mechanical bucket tappets without adjustment

shims.

• The valve clearance is adjusted by the different thickness of the bucket tappets. The

tappet thickness can be determined by the engraved number (e.g. number “402” means

a thickness of 3.402 mm). In order to replace the tappets the camshafts have to be

removed (refer to the workshop manual for details).

• The valve clearance has to be audibly inspected (and if noisy adjusted) every 120,000

km.

L1001.4_01009

1 Camshaft 4 Tappet thickness

2 Tappet cross-sectional view 5 Valve stem contact surface

3 Cam lobe contact surface 6 Bucket tappet

01-14 Curriculum Training

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Mazda 13B-MSP Technical Information Page 24