Engine Coolant - Suzuki Intruder VZR1800 Service Manual

8-2 COOLING AND LUBRICATION SYSTEM

ENGINE COOLANT

At the time of manufacture, the cooling system is filled with a 50:50 mixture of distilled water and ethylene
glycol anti-freeze. This 50:50 mixture will provide the optimum corrosion protection and excellent heat pro-
tection, and will protect the cooling system from freezing at temperatures above –31 °C (–24 °F).
If the motorcycle is to be exposed to temperatures below –31 °C (–24 °F), this mixing ratio should be
increased up to 55% or 60% according to the figure.
Anti-freeze density
50%
55%
60%
!
* Use a high quality ethylene glycol base anti-freeze, mixed with distilled water. Do not mix an
alcohol base anti-freeze and different brands of anti-freeze.
* Do not put in 60% and more anti-freeze or 50% and less. (Refer to below figure.)
* Do not use a radiator anti-leak additive.
50% Engine coolant including reserve tank capacity
Anti-freeze
Water
(˚F)
32
14
–4
–22
–40
–58
–76
–94
Fig. 1 Engine coolant density-freezing
point curve
"
* You can be injured by scalding fluid or steam if you open the radiator cap when the engine is
hot. After the engine cools, wrap a thick cloth around cap and carefully remove the cap by
turning it a quarter turn to allow pressure to escape and then turn the cap all the way off.
* The engine must be cool before servicing the cooling system.
* Coolant is harmful;
• If it comes in contact with skin or eyes, flush with water.
• If swallowed accidentally, induce vomiting and call physician immediately.
• Keep it away from children.
Freezing point
–30 °C (–24 °F)
–40 °C (–44 °F)
–55 °C (–67 °F)
1 350 ml (2.9/2.4 US/lmp.pt)
1 350 ml (2.9/2.4 US/lmp.pt)
(˚C)
0
–10
–20
–30
–40
–50
–60
–70
20 40 60 80 100
Density (%)
(˚F) (˚C)
302 150
284 140
266 130
248 120
230 110
212 100
0 10 20 30
Density (%)
Fig. 2 Engine coolant density-boiling
point curve
(kgf/cm²)
1.5
0.9
0.5
0
40 50 60