Volkswagen Marine SDI Series Operating Manual page 25

DO-IT-YOURSELF
Fault
Engine becomes too hot
Cause
Seawater valve closed
Seawater filter is clogged
Seawater pump aspirates air
Gearbox oil cooler clogged
Ribbed V-belt for seawater pump
loose or defective
Impeller of seawater pump defective
Insufficient coolant in cooling system
- engine circuit
Coolant pump for engine circuit
defective
Should the individual remedies not solve the problem, your VW Marine Service Partner will
be happy to provide additional assistance.
Important
Observe the safety precautions
beginning on page 17 before
performing out any work on the
engine or
compartment.
24
24
in the engine
Remedy
Check impeller and renew if necessary.
Then open seawater valve.
Close seawater valve, check impeller and
renew if necessary.
Then clean seawater filter and open
seawater valve.
Close seawater valve, check impeller and
renew if necessary. Then check cover of
seawater filter for proper seating and leaks
and check suction hose. Open seawater
valve
Check gearbox oil cooler and clean
if necessary
Check ribbed V-belt and tensioning element;
renew if necessary
Renew impeller
Add coolant (pure water in an emergency).
Check cooling system for leaks and seal off
if necessary.
This fault should always be checked and
eliminated by a VW Marine Service Partner,
as special tools are required.
SELF-HELP