Yamaha YZF-R15, Service Manual

Page: 83 / 338

3-14 3-15
ENGINE ENGINE
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Make sure the vehicle is upright.
2. Check:
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Coolant level
The coolant level should be between the
maximum level mark “a” and minimum level
mark “b”.
Below the minimum level mark
→ Add the
recommended coolant to the proper level.
NOTE:
To access the coolant reservoir cap “1”, remove
the left side cover. Refer to “GENERAL CHAS-
SIS” on page 4-1.
CAUTION:
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Adding water instead of coolant lowers the
antifreeze content of the coolant. If water is
used instead of coolant check, and if nec-
essary, correct the antifreeze concentra-
tion of the coolant.
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Use only distilled water. However, if dis-
tilled water is not available, soft water may
be used.
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Check:
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Coolant level
NOTE:
Before checking the coolant level, wait a few
minutes until it settles.
CHECKING THE COOLING SYSTEM
1. Remove:
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Front panels
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Seat
Refer to “GENERAL CHASSIS” on page 4-1.
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Fuel tank
Refer to “FUEL TANK ” on page 7-1.
2. Check:
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Radiator “1”
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Radiator inlet hose “2”
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Radiator outlet hose “3”
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Coolant reservoir hose “4”
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Water pump breather hose “5”
Cracks/damage
→ Replace.
Refer to “RADIATOR” on page 6-1.
3. Install:
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Fuel tank
Refer to “FUEL TANK ” on page 7-1.
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Seat
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Front panels
Refer to “GENERAL CHASSIS” on page 4-1.
CHANGING THE COOLANT
1. Remove:
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Right front panel
Refer to “GENERAL CHASSIS” on page 4-1.
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Side panels
Refer to “GENERAL CHASSIS” on page 4-1.
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Seat
Refer to “GENERAL CHASSIS” on page 4-1.
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Fuel tank
Refer to “FUEL TANK ” on page 7-1.
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Air filter case
Refer to “GENERAL CHASSIS” on page 4-1.
2. Remove:
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Radiator cap “1”
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.
3. Remove:
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Coolant drain bolt “1”
(along with the copper washer)
4. Drain:
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Coolant
(from the engine and radiator)
5. Disconnect:
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Coolant reservoir hose “1”
6. Remove:
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Coolant reservoir “2”
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Coolant reservoir cap “3”
7. Drain:
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Coolant
(from the coolant reservoir)
8. Install:
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Coolant reservoir
9. Connect:
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Coolant reservoir hose
10.Install:
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Coolant drain bolt
(along with the copper washer
)
11.Fill:
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Cooling system
(with the specified amount of the recom-
mended coolant)
Handling notes for coolant
Coolant is potentially harmful and should be
handled with special care.
WARNING
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If coolant splashes in your eyes, thorough-
ly wash them with water and consult a doc-
tor.
1
1
T
R
.
.
Coolant reservoir bolt
7 Nm (0.7 m·Kg, 5.1 ft·lb)
T
R
.
.
Coolant drain bolt
Recommended antifreeze
High-quality ethylene glycol an-
tifreeze containing corrosion in-
hibitors for aluminum engines
Mixing ratio
1:1 (antifreeze:water)
Radiator capacity (including all
routes)
0.59 L
Coolant reservoir capacity (up
to the maximum level mark)
0.25 L
1
2
3
New
7 Nm (0.7 m·Kg, 5.1 ft·lb)