Camshaft, Lifters and Push Rods: Service Precautions

Attention must be paid to the following if work had been carried out on the cylinder head, for which the camshaft was removed:
Hydraulic valve tappets expand when without load from the camshaft and must be allowed enough time after installation to constrict again. For this reason, fast assembly could cause "closed" valves to still be open and have contact with the pistons.

The following waiting times are necessary between installing of the camshaft and mounting the cylinder head.
Room temperature (20°C) 4 min.
10°C .. 20°C 11 min.
0°C ... 10°C 30 min.

Working on valve timing gear with cylinder head installed:
Turn engine approx. 30° opposite the engine direction of rotation on the central bolt. In this way none of the pistons will be in TDC.
Install camshafts in such a way that peaks of cams for cylinder No.1 point to each other. Mount camshafts and secure with special tool 11 3 240.

Keep to the above mentioned waiting times. Turn engine from the 300 before the TDC setting in the direction of rotation to the TDC setting and mount the timing chain.

A description of disassembling and repairing engine are provided in chronological sequence on the following pages. The list of contents is provided to help take up work again after an interruption or to more easily find a certain point. They only describe direct removal and installation, and do not contact full details of procedures.