Replacing The Coolant - Rotax 912 iSc Maintenance Manual

General note
See
Carry out visual inspection of all coolant hoses (1) for damage, leaks,
Coolant hoses
hardening as a result of heat and porosity.
Inspect all connections on the top and bottom of the cylinder head and on
Water pump
the water pump (2).
Inspect expansion tank (3) for damage. Inspect protection rubber at the
Expansion tank
bottom of the tank for tight fit.
Inspect the gasket of the radiator cap (4) and check the pressure release
Radiator cap
valve and return valve for proper operation.
See chapt. 12-20-00 section: 10.4).

10.2) Replacing the coolant

General note
ENVIRONMENT NOTE
Coolant and mixtures of coolant and water have to be treated as
hazardous waste!
To replace the coolant the following steps are necessary:
Procedure
Step
1
2
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Risk of Burns!
WARNUNG WARNING
Hot engine parts!
Always allow engine to cool down to ambient temper-
ature before start of any work.
Fig. 13.
Risk of Burns!
WARNUNG WARNING
Never open the radiator cap when the cooling system
is hot. For safety's sake, cover cap with a rag and open
slowly. Sudden opening of the cap could provoke the
escape of boiling coolant and result in scalding.
Use only coolant as recommended in the current Op-
NOTICE
WARNUNG
erators Manual.
Open the radiator cap on the expansion tank.
Remove the bottom attachment screw (1) (with sealing ring) of water pump
(2).
Procedure
12-20-00
page 26
January 01/2012