Rocker Arm Assembly: Service and Repair

Removing And Installing/replacing Rocker Arm Shaft

Disconnect battery.

Remove cylinder head cover. Service and Repair





Remove rocker shaft/camshaft bearing cap bolts gradually in sequence (10-1 ).

Install hint:
Tighten rocker shaft/camshaft bearing cap bolts gradually in sequence (1-10).
Stage 1:
Hand tighten evenly.
Stage 2:
Rocker arm shaft to bearing cap
M8 30 Nm

Caution: To avoid damage to the rocker shafts, slacken each rocker shaft/camshaft bearing cap bolt one turn at a time in sequence.





Remove exhaust rocker shaft (1) and intake rocker shaft (2).

Unclip intake valve rocker arm spacer.

Remove rocker arms from shaft.

Note: Lubricate the roller portion of the rocker arms and shaft with clean engine oil.

Hydraulic lifters are replaced as an assembly with the rocker arms.

When tightening the rocker shaft/camshaft cap bolts, ensure the camshaft bearing caps are fully seated and the roller rocker arms remain in their proper position.

Caution: the inlet and exhaust rocker shafts are not interchangeable.




1. Inlet rocker arm shaft
2. Exhaust rocker arm shaft
3. Groove for identifying inlet rocker arm shaft
4. Groove for identifying exhaust rocker arm shaft