9-5 Linear Sport Wagon (9600) L4-2.3L Turbo (B235) (2002)
Balance Shaft Chain: Customer Interest
Engine - Timing Chain Noise/Oil Sludging
Bulletin Number: 210-2561
Date: June 2005
Market: all
Noise from the timing chain and oil sludge in the engine
Cars affected
Saab 9-5 M98-03 with engine alternative B205 and B235
Saab 9-3 (9400) M99-03 with engine alternative B205 and B235
Background
Various conditions can cause the formation of oil sludge in the engine or a rattling noise from the timing chain and balancer shaft chain.
In the case of customer complaint, the following procedure must be carried out.
Note
If repair is to be carried out under New Car Warranty or Special Policy, prior authorization from is required from the manager responsible at the
importer, ETAC or CIC.
Symptom description
Rattling timing chain, abnormal whining, bellowing or knocking noise from the engine or oil pressure lamp on.
Parts required
Air filter, see EPC
Replace if necessary:
91 86 156 Oil suction pipe/strainer
55 560 444 Oil trap
91 38 009 0-ring
any other parts, see EPC
Action, checking the damage
1.
Checking
Check the oil level, fill as necessary. If more than 1 litre of oil is added then run the engine for 15 minutes more before checking for noise. Listen
to the engine for noise. The engine must be run to operating temperature! If the engine sounds normal and the oil pressure lamp does not come on,
consult with the owner about the need to perform more frequent oil and filter changes and the need to switch to fully synthetic oil in accordance
with Saab recommendations.
2.
If the oil pressure lamp flashes or comes on steadily:
^
Check the oil level, top up as necessary.
^
Check the oil pressure in accordance with WIS - Engine - Basic engine 4-cyl (petrol) - Adjustment/Replacement - Measuring oil pressure. If
the oil pressure is in accordance with the specification, replace the oil pressure sensor. If not, continue with step 5.
3.
Checking in the event of noise:
^
Checking in the event of noise.
^
If a high-pitched whining noise is audible, particularly in a cold engine, then it is most often from the oil filter or the check valve in the oil
filter adapter.
^
If a low-pitched "bellowing" noise is audible at idling speed, similar to the noise from a hydraulic pump, then this indicates a clogged oil
strainer.