RAM 1500 CLASSIC 2020 Owner's Manual page 262

260 SERVICING AND MAINTENANCE
could lead to severe internal engine damage. If any
coolant is needed to be added to the system,
please contact a local authorized dealer.
Mixing engine coolant (antifreeze) types is not

recommended and can result in cooling system
damage. If HOAT and OAT coolant are mixed in
an emergency, have a authorized dealer drain,
flush, and refill with OAT coolant (conforming to
MS.90032) as soon as possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of
engine coolant (antifreeze), and to ensure that
engine coolant (antifreeze) will return to the
radiator from the coolant expansion bottle/
recovery tank if so equipped.
The cap should be inspected and cleaned if there
is any accumulation of foreign material on the
sealing surfaces.
WARNING!
Do not open hot engine cooling system. Never

add engine coolant (antifreeze) when the
engine is overheated. Do not loosen or
remove the cap to cool an overheated engine.
Heat causes pressure to build up in the
cooling system. To prevent scalding or injury,
do not remove the pressure cap while the
system is hot or under pressure.
Do not use a pressure cap other than the one

specified for your vehicle. Personal injury or
engine damage may result.
Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is
a regulated substance requiring proper disposal.
Check with your local authorities to determine the
disposal rules for your community. To prevent
ingestion by animals or children, do not store
ethylene glycol-based coolant in open containers
or allow it to remain in puddles on the ground. If
ingested by a child or pet, seek emergency
assistance immediately. Clean up any ground spills
immediately.
Checking Coolant Level — 3.6L and 5.7L
Engines
With the engine off and cold, the level of the engine
coolant should be between the ADD and SAFE
range on the dipstick.
(Continued)
WARNING!
To check the coolant level:
1. Open the coolant reservoir.
Opening The Coolant Reservoir
2. Lift and remove the plastic dipstick from the
reservoir neck.
Coolant Reservoir Dipstick
3. Check the coolant level on the dipstick.