Yamaha RS90GTZ Service Manual page 28

COOLING SYSTEM
3. Remove:
• Coolant reservoir cap
WARNING
Do not remove the coolant reservoir cap
when the engine is hot. Pressurized scald-
ing hot fluid and steam may be blown out,
which could cause serious injury. When the
engine has cooled, place a thick rag or a
towel over the coolant reservoir cap. Slowly
turn the cap counterclockwise until it stop.
This allows any residual pressure to
escape. When the hissing sound has
stopped, press down on the cap while turn-
ing it counterclockwise to remove it.
4. Place an open container under the coolant
hoses.
5. Disconnect:
• Thermostat outlet hose
• Radiator outlet hose
(RS90GTZ/RS90LTGTZ)
• Right heat exchanger inlet hose
(RST90GTZ)
RS90GTZ/RS90LTGTZ
RST90GTZ
6. Drain the coolant.
TIP
Lift up the tail of the snowmobile to drain the
coolant.
2-5
INSP
ADJ