Cylinder Head
Inspection / Checking
A5.05. 01.10.00.00
150
M20
en / 16.09.1997 IB001447 1/1
01
Ĺ
See also: 01.03.01.nn, 01.06.01.nn, 01.11.01.nn, 07.07.01.nn
Spare parts list: B1.05.01.2.2107
Time requirement: 1 Pers./ 0,50 h
Personnel qualification: skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Inspection:
of the cylinder heads every 150 h
Sequence of operations:
1. Check the sealing between cylinder
head, cylinder liner and cooling water
distributor housing for exhaust gas
blow-by and/or cooling water at the
inspection bore (Fig. 1/1).
Loosen cylinder head nuts in the case
of leakages and retighten them
according to prescriptions
(01.11.01.nn). If no tightness is
obtained, remove the cylinder head -
clean and check the sealing faces - and
refit with a new gasket according to
prescriptions (01.11.01.nn).
2. Check cylinder head externally for leaks.
2.1 If lubricating oil leaks out, check fixing screws of the cylinder head cover for tight fit and/or
check profile seal for damage.
2.2 In the case of leaks at the wedged pieces of the medium guide check fastening screws for
tight fit. Renew gaskets if necessary.
3. Remove cylinder head cover. Inspect cylinder head upper side.
3.1 Check uniform valve motion. Irregularities can be stated best at low engine speed.
3.2 Check proper function of the valve rotators (01.03
.01.nn).
3.3 Check valve springs for damage.
3.4 Check lubricating oil supply of the rockers and rocker bearings.
Fig. 1
1
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