Changing The Coolant - Yamaha WR250R Service Manual

Radiator inlet hose "2"
G
Radiator outlet hose "3"
G
Cracks/damage → Replace.
Refer to "RADIATOR" on page 6-1, "THER-
MOSTAT" on page 6-4 and "WATER PUMP"
on page 6-6.
2
3. Install:
Fuel tank
G
Refer to "FUEL TANK" on page 7-1.
Fuel tank (left/right)
G
Seat
G
Refer to "GENERAL CHASSIS" on page 4-1.
EAS21130

CHANGING THE COOLANT

1. Remove:
Seat
G
Air scoop (left/right)
G
Refer to "GENERAL CHASSIS" on page 4-1.
2. Remove:
Coolant reservoir hose "1"
G
Recovery tank "2"
G
2
3. Drain:
Coolant
G
(from the recovery)
4. Remove:
Radiator cap "1"
G
Remove the radiator cap by removing lock
screw "2".
1
3
1
3-18
1
EWA13030
WARNING
A hot radiator is under pressure. Therefore,
do not remove the radiator cap when the en-
gine is hot. Scalding hot fluid and steam may
be blown out, which could cause serious in-
jury. When the engine has cooled, open the
radiator cap as follows:
Place a thick rag or a towel over the radiator
cap and slowly turn the radiator cap counter-
clockwise toward the detent to allow any re-
sidual pressure to escape. When the hissing
sound has stopped, press down on the radi-
ator cap and turn it counterclockwise to re-
move.
5. Remove:
Coolant drain bolt (water pump) "1"
G
(along with the copper washer)
6. Drain:
Coolant
G
(from the engine and radiator)
7. Install:
Copper washer
New
G
Coolant drain bolt (water pump)
G
Coolant drain bolt (engine)
10 Nm (1.0 m•kg, 7.2 ft•lb)
8. Install:
Reservoir tank
G
9. Connect:
Coolant reservoir hose
G
ENGINE
2
1