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Yamaha YZ250F(E) - Checking the Radiator Cap; Checking the Radiator Cap Opening Pressure

Yamaha YZ250F(E)
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ENGINE
3-9
5. Install:
Copper washers
Coolant drain bolt
6. Pour coolant.
EWA13040
WARNING
If coolant splashes in your eyes, thorough-
ly wash them with water and consult a
doctor.
If coolant splashes on your clothes, quick-
ly wash it away with water and then with
soap and water.
If coolant is swallowed, induce vomiting
and get immediate medical attention.
ECA13480
NOTICE
Adding water instead of coolant lowers the
antifreeze content. If, therefore, water is
used instead of coolant, check, and if nec-
essary, adjust the antifreeze concentra-
tion.
Use only distilled water. However, if dis-
tilled water is not available, soft water may
be used.
If coolant comes into contact with painted
surfaces, immediately wash them with wa-
ter.
Do not mix different types of coolant.
7. Install:
Radiator cap
8. Start the engine, warm this up for several
minutes, stop it, and then wait for it to cool
down.
9. Check:
Coolant level
Refer to “CHECKING THE COOLANT LEV-
EL” on page 3-8.
EAS1SM1073
CHECKING THE RADIATOR CAP
1. Check:
Seal (radiator cap) “1”
Valve and valve seat “2”
Crack/damage Replace.
Exist fur deposits Clean or replace.
EAS1SM1074
CHECKING THE RADIATOR CAP OPENING
PRESSURE
1. Check:
Radiator cap opening pressure
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the radiator cap tester adapter “2” and
the radiator cap tester “3” to the radiator cap
“1,” and activate the tester to check whether
it can stay for 5 to 10 seconds within stan-
dard pressure values.
TIP
Before attaching the cap to the tester, apply
water to its sealing surface.
No stay Replace.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Coolant drain bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Recommended coolant
High quality ethylene glycol
anti-freeze containing anti-cor-
rosion for aluminum engine
Radiator capacity (including all
routes)
1.00 L (1.06 US qt, 0.88 Imp.qt)
Coolant mixing ratio
1:1 (Coolant:Water)
New
T
R
.
.
Radiator cap opening pressure
108–137 kPa (1.08–1.37 kg/cm
2
,
15.7–19.9 psi)
Radiator cap tester
90890-01325
Mityvac cooling system tester kit
YU-24460-A
Radiator cap tester adapter
90890-01352
Pressure tester adapter
YU-33984

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