Acura TSX 2005 User Manual page 203

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Engine Coolant
RADIATOR CAP
1. Make sure the engine and radiator
are cool.
2. Relieve any pressure in the cooling
system by turning the radiator cap
counterclockwise, without
pressing down.
3. Remove the radiator cap by
pushing down and turning
counterclockwise.
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4. The coolant level should be up to
the base of the filler neck. Add
coolant if it is low.
Pour the coolant slowly and
carefully so you do not spill. Clean
up any spill immediately; it could
damage components in the engine
compartment.
5. Put the radiator cap back on and
tighten it.
6. Pour coolant into the reserve tank.
Fill it to halfway between the MAX
and MIN marks. Put the cap back
on the reserve tank.
Do not add any rust inhibitors or
other additives to your vehicle's
cooling system. They may not be
compatible with the coolant or
engine components.