How To Add Coolant To The Radiator - Buick 1999 Riviera Owner's Manual

How to Add Coolant to the Radiator

If you hear a hiss, wait for that to stop. A hiss means
there is still some pressure left.
2. Then keep turning the pressure cap, but now push
down as you turn it. Remove the pressure cap.
1. You can remove the
radiator pressure cap
when the cooling
system, including the
radiator pressure cap and
upper radiator hose, is
no longer hot. Turn the
pressure cap slowly
counterclockwise until it
first stops. (Don't press
down while turning the
pressure cap.)
4. Then fill the coolant recovery tank to FULL COLD.
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3. Fill the radiator with the
R
-
proper DEX COOL
coolant mixture, up to
the base of the filler
neck. (See "Engine
Coolant" in the Index
for more information
about the proper
coolant mixture.)
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