Cylinder Head
Repair / Reassembly
A5.05. 01.11.01.00
M20
en / 16.09.1997 IB001353 4/5
01
Ĺ
6.4 Screw hydr. tensioning element (Fig. 2/W4) onto spacer (W7) and link with high-pressure
pump (W1) via high-pressure hoses (Fig. 3/W2 and W3) distributor (W5).
6.5 Press hydraulic tensioning element (Fig. 2/W4) by means of pin (W8) by turning down
against the bearing ring (W6) onto block length and tighten hand-tight (valve [Fig. 3/Z]
open at the high-pressure pump (W1)).
6.6 Close valve (Fig. 3/Z) at high-pressure pump (W1) and simultaneously extend all 4 cylinder
head screws steadily with a hydraulic pressure of
p = 600 bar.
Attention:
Pressure must remain constant in case the pump is not activated, otherwise a tightening
error occurs.
6.7 Firmly tighten all round nuts (Fig. 2/12) uniformly with pin (W8), ensure smooth running.
6.8 Check the fixed rest of round nuts.
• Lower pressure by 50 bar.
• Round nuts should no longer be able to be loosened with the pin.
6.9 Release and remove hydraulic tensioning element.
W2
W3W8
W5
Z W1
Fig. 3
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