Set valve clearance

AP05.30-T-0560BB

Set valve clearance

28.10.2019

Engine

457.942 in model 671.015/020/021/030/042/332/333

Engine

457.944 in model 613.358/388

1

Adjustment screw

2

Jam nut

E

Check of intake valve clearances

A

Check of exhaust valve clearances

1

Detach cylinder head cover



Engine 457.942

AR01.20-T-5014AA



Engine 457.944

AR01.20-T-5014BA

2

Select method for adjusting valve clearance

General information on adjusting valve clearance

AH05.30-N-1000-01BB

3

Attach cranking device for engine and move engine to crankshaft position for selected adjustment method

 Bolt, inspection hole cap to timing case

*BA01.60-N-1001-01H

 Cranking device

*407589006300

4

Check valve clearance (A, E) and adjust

AP05.30-T-0560-01BB

 Inspect or adjust valve clearance when engine is cold.
Wait at least 30 minutes after switching off the engine, even if the engine has operated only for a short time, in order to ensure that the engine is evenly warmed through.

 Commercially available devices/tools:
Feeler gage

Valve clearance

*BE05.30-N-1001-01J

 Jam nut to rocker arm adjustment screw

*BA05.00-N-1002-01G

 Valve adjusting wrench

*422589001100

5

Detach cranking device and attach cap for inspection hole on timing case

 Bolt, inspection hole cap to timing case

*BA01.60-N-1001-01H

 Cranking device

*407589006300

6

Attach cylinder head cover



Engine 457.942

AR01.20-T-5014AA



Engine 457.944

AR01.20-T-5014BA

Check values for valves

Number

Designation

Engine 457.9

BE05.30-N-1001-01J

Valve clearance

Inlet

mm

0,40

Outlet

mm

0,60

 Timing case

Number

Designation

ENGINE 457.9

BA01.60-N-1001-01H

Bolt, inspection hole cap to timing case

Nm

25

 Engine timing - general

Number

Designation

Engine 457.9

BA05.00-N-1002-01G

Jam nut to rocker arm adjustment screw

Nm

50