Honda VFR800F 2014 Service Manual page 164

COOLING SYSTEM
Removing the
radiator cap while the engine is hot can allow
the
coolant to spray out, seriously scalding you.
Always
let the engine
and
radiator cool down before removing
the
radiator cap.
SERVICE INFORMATION
GENERAL
NOTICE
Using coolant with
silicate corrosion
inhibitors may
cause
premature
wear of
water
pump
sea/s
or
btockage
of
radiatorpassages.
Using tap
water may cause engine damage.
'
Add coolant at
the reserve
tank.
Do not remove the
radiator cap except
to
refill or drain the system.
.
All cooling system services
can be done with the engine
in the frame,
.
Avoid
spilling coolant on painted surfaces.
'
After servicing the system, check
for
leaks with a cooling system tester.
'
For coolant
temperature gauge & indicator/ECT sensor
inspection
(page 20-15).
.
For
fan
motor relay inspection (page 20-26)
TOOL
est probe
(2
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1O
TROUBLESHOOTING
Engine temperature too high
.
Faulty high coolant temperature
indicator or ECT sensor (page
20_15)
.
Thermostat stuck closed
.
Faulty radiator cap
.
lnsufficient coolant
.
Passage blocked in radiator, hoses,
orwater jacket
.
Air
in system
.
Faulty cooling fan
motor
.
Faulty fan
motor relay (page 20-26)
.
Faulty water pump
Engine temperature
too low
.
Faulty high coolant
temperature
indicator or
ECT sensor (page 20-15)
.
Thermostat stuck open
.
Faulty fan
motor relay
Coolant
leak
.
Faulty water pump mechanical seal
.
Deteriorated O-rings
.
Faulty radlator
cap
.
Damaged or deteriorated cylinder head gasket
.
Loose hose connection or clamp
.
Damaged or deteriorated hose
.
Damaged radiator
8-2