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30/ENGINE - WORK ON INDIVIDUAL PARTS
Preparing timing chain tensioner for installation
18.18
–
When assembling, first connect the autodecompression spring and then insert the
screw through the autodecompression weight.
The arm of the autodecompression spring
through the autodecompression weight.
–
Position the autodecompression weight. Mount and tighten screw
the autodecompression spring.
Guideline
Screw, autodecompression
300110-10
–
Mount the autodecompression shaft in the camshaft. Install a new lock ring.
–
Check the functioning.
»
If the autodecompression spring does not completely retract the autodecom-
pression shaft:
–
Replace the autodecompression spring.
–
Fully compress the timing chain tensioner.
Info
This requires considerable force since the oil has to be pressed out.
–
Release the timing chain tensioner.
Without pressure, the timing chain tensioner expands fully.
200171-10
–
Place two spacing washers 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
Thickness of spacers
–
Release the timing chain tensioner.
The latching system locks and the piston stops moving.
End position of piston after latching
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.
is long enough to pass right
M6
3... 4 Nm
(2.2...
3 lbf ft)
2... 2.5 mm (0.08... 0.098 in)
3 mm (0.12 in)
116
. Reconnect
Loctite
®
243™
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