Coolant; Coolant Recommendation; Checking & Adding Coolant - Honda CRF250R Owner's Manual

Coolant

Your CRF's liquid cooling system dissipates
engine heat through the coolant jacket that
surrounds the cylinder and cylinder head.
Maintaining the coolant will allow the cooling
system to work properly and prevent freezing,
overheating, and corrosion.

Coolant Recommendation

Use only genuine HONDA PRE-MIX COOLANT
containing corrosion inhibitors, specifically
recommended for aluminum engines when adding
or replacing the coolant.
Genuine HONDA PRE-MIX COOLANT is
excellent at preventing corrosion and overheating.
The effects last for up to 2 years.
The coolant should be inspected and replaced
properly by following the maintenance schedule
(page 25).
Use any genuine HONDA PRE-MIX COOLANT
without diluting with water.
NOTICE
Do not use non-ethylene glycol coolant, tap water,
nor mineral water when adding or replacing the

coolant.

Use of improper coolant may cause damage, such
as corrosions in the engine, blockage of the
cooling passage or radiator and premature wear
of the water pump seal.
Checking & Adding Coolant
Refer to Important Safety Precautions on page 23.
1. Position your CRF on an optional workstand or
equivalent support so that it is securely held in
place in an upright position.
2. With the engine cold, remove the radiator cap
(1) and check coolant level. The coolant level
is correct when it is at the bottom of the
radiator filler neck (2).
WARNING
Removing the radiator cap while the
engine is hot can cause the coolant to
spray out, seriously scalding you.
Always let the engine and radiator cool
down before removing the radiator cap.
(1)
(3)
(2)
(1) radiator cap
(2) radiator filler neck
(3) air bleed bolt and O-ring
Coolant
3. If the coolant level is low, remove the air bleed
bolt and O-ring (3) on the left radiator upper
tank, and then add the coolant up to the filler
neck.
Inspect the coolant level before each outing.
A coolant loss of 20 – 60 cm (0.7 – 2.0 US oz,
3
0.7 – 2.1 Imp oz) through the overflow hose is
normal. If coolant loss is more than this,
inspect the cooling system.
Capacity:
1.02 ℓ (1.08 US qt, 0.90 Imp qt) after
disassembly
0.95 ℓ (1.00 US qt, 0.84 Imp qt) after
draining
4. Tighten the air bleed bolt to with a new O-ring
the specified torque:
1.6 N·m (0.2 kgf·m, 1.2 lbf·ft)
5. Install the radiator cap securely.
NOTICE
If the radiator cap is not installed properly, it will
cause excessive coolant loss and may result in
overheating and engine damage.
Servicing Your Honda
53