5 Series E34 525ix (M50) SAL
11 00 ...
General information on valve timing work (M50 / M50 VANOS)
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.montieren
Keep to the above mentioned waiting times. Turn engine from the 30
°
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 contain full details of procedures.
RA General information on valve timing work (M50 / M50 VANOS)
BMW AG - TIS
21.01.2013 20:14
Issue status (12/2007) Valid only until next DVD is issued
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