STEYR MOTORS Marine Engine 2012 Series, Service Manual

Page: 218 / 274

Cooling System
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05.00.08 Fill cooling system (Example)
Closed cooling system
1. Fill cooling circuit with specified coolant
(SMO Z011785/0)) only. Coolant level
should reach the lower edge of the filler
neck in the expansion tank, refer to vehicle
manufacturer specification.
NOTE: Cooling system purges automatically
while filling.
ATTENTION: For a new filling of the closed
cooling circuit, make sure
that the cooling system is
purged completely.
2. Let the engine run, check coolant level and
refill coolant if necessary.
Due to extensioning the coolant-volume, a change of the cooling-system-
characteristic appears.
Check the cooling-system-pressure.
The required static pressure at operating temperature (75°-80°C) should
be 500 mBar overpressure.
If the coolant-volume extends more than 8 litres, a larger expansion tank
and a pressure-cap (1,5 Bar opening-pressure) is recommended.
With the set “heating pump”, the discharge can be 18 l/min depending on
temperatur (connecting limit 75°C, disconnecting limit 70°C) but
independent on the engine speed.
05.03 Pipes, Thermostat
05.03.01 Coolant pipes and hoses
Remove defective hoses by loosening the respective hose clamps and replace.
ATTENTION: Tighten lose clamps with a torque of 3,5 Nm.