exhaust system. For example, leakage could be seen
at the exhaust manifold, before and after the turbo,
around the muffler and in worse case even in the
exhaust end pipe. Consequences could lead to
clogged exhaust gas recirculation systems and
exhaust aftertreatment systems.
Signs of oil leaking caused by "slobber" do not indicate
an engine problem but indicates low load operation. To
minimize the risk of malfunctions caused by operation
at low load, follow these points as a complement to
normal maintenance:
•
Run in the engine as soon as possible.
•
Load the engine so it reaches working temperature
as soon as possible.
•
Turn off the engine instead of running on idle for
longer periods.
•
Avoid load levels below 20% as constant operation.
•
If the engine is regularly tested without load, limit the
duration of the operation to 5 minutes. Run the
engine at full load for about 4 hours once a year, for
the carbon deposits in the engine and exhaust
system to burn off.
•
If visible slobber has occurred, it can be burned off
by running the engine on at least 30% load for about
40-60 minutes.
Operation
47710925 01-2019 © AB VOLVO PENTA 41
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