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18 ENGINE
181
Position ball
©
Position spring
0
©
©
311891-10
Mount and tighten screw O-
Guideline
Loctite® 243™
Screw,
auto
decompres
sion
M6
3.5 Nm
(2.58 Ibf ft)
Q
311890-10
18.4.18 Preparing timing chain tensioner for installation
—
Fully compress the timing chain tensioner.
U
4$
Info
This requires considerable force since the oil has to be pressed out.
I
Release the timing chain tensioner.
Without pressure, the timing chain tensioner expands fully.
200171-10
Place two compensating disks or similar aids next to the piston of the timing
chain tensioner. This should ensure that when pushed down, the piston does not
fully withdraw.
Guideline
0
Thickness of the compensating disks
2... 2.5 mm (0.08... 0.098 in)
Release the timing chain tensioner.
The latching system locks and the piston stops moving.
End position of piston after latching
3 mm (0.12 in)
200172-10
Info
This position is necessary for installation.
If the timing chain tensioner is now pressed in once more (while it is
installed) and then pulled out no more than halfway (preventing it from
coming out fully), the latching system locks and the timing chain tensioner
can no longer be compacted; this function is necessary to ensure
sufficient tension of the timing chain, even at low oil pressure.
I
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