Porsche 928 Workshop Manual page 285

928
Engine I Lubrication
17
Cleaning the complete engine-oil system following engine failure (bearing
failure)
Note
This cleaning sequence is only intended to
given pointers as to where chips may be
found. The actual scope of work involved
must be determined individually for each en-
gine failure.
Replace the following parts:
- Hydraulic valve tappets
Chain tensioner
Oil filter
The following parts must be dismantled,
checked and cleaned thoroughly:
The following parts must be cleaned
thoroughly and/or rinsed several times:
Note:
All oil feeder holes may be flushed thoroughly
with a commercially available oil - gasoline
syringe and benzine.
- Oil sump
- Oil inlet pipe
Crankcase
- Crankshaft
Cylinder heads
Oil pump
Thermostat housing
Bypass valve
- Release valve
Oil retension valve in the cylinder head
See Page 17 - 10
Camshaft housing
- Oil lines
- Oil filler pipe
- Oil cooler in rhe radiator
Change oil filter and engine oil after ap-
pror. 500 km running time.
Note:
Following an engine failure, the complete
intake system must be checked for foreign
bodies and/or oil and cleaned before
assembly.
Cleaning of engine-oil system
Printed In Germany -XX, 1988
17- 11