2019 Ram 2500 engine coolant

504 SERVICING AND MAINTENANCE
ENGINE COMPARTMENT
6.4L Engine
1 — Engine Coolant Pressure Cap6 — Battery
2 — Engine Coolant Reservoir 7 — Distribution Center (Fuses)
3 — Engine Oil Fill 8 — Washer Fluid Reservoir
4 — Engine Oil Dipstick 9 — Power Steering Fluid Reservoir
5 — Brake Fluid Reservoir 10 — Air Cleaner Filter

522 SERVICING AND MAINTENANCE
(Continued)
To minimize the possibility of catalytic converter damage:
• Do not interrupt the ignition when the transmission is ingear and the vehicle is in motion.
• Do not try to start the vehicle by pushing or towing the vehicle.
• Do not idle the engine with any ignition components disconnected or removed, such as when diagnostic testing,
or for prolonged periods during very rough idle or
malfunctioning operating conditions.
Cooling System
Engine Coolant Checks
Check the engine coolant (antifreeze) protection every
12 months (before the onset of freezing weather, where
applicable). If the engine coolant (antifreeze) is dirty or rusty
in appearance, the system should be drained, flushed and
refilled with fresh coolant. Check the front of the A/C
condenser (if equipped) or radiator for any accumulation of
bugs, leaves, etc. If dirty, clean by gently spraying water
from a garden hose vertically down the face of the A/C
condenser (if equipped) or the back of the radiator core.
Check the engine cooling system hoses for brittle rubber,
cracking, tears, cuts and tightness of the connection at the
coolant recovery bottle and radiator. Inspect the entire
system for leaks.
DO NOT REMOVE THE COOLANT PRESSURE CAP
WHEN THE COOLING SYSTEM IS HOT.
WARNING!
• You or others can be badly burned by hot engine coolant (antifreeze) or steam from your radiator. If you
see or hear steam coming from under the hood, do not
open the hood until the radiator has had time to cool.
Never open a cooling system pressure cap when the
radiator or coolant bottle is hot.
• Keep hands, tools, clothing, and jewelry away from the radiator cooling fan when the hood is raised. The fan
starts automatically and may start at any time, whether
the engine is running or not.
• When working near the radiator cooling fan, discon -
nect the fan motor lead or turn the ignition to the OFF
mode. The fan is temperature controlled and can start at
any time the ignition is in the ON mode.
WARNING! (Continued)

SERVICING AND MAINTENANCE 523
Cooling System — Drain, Flush And Refill
NOTE:
Some vehicles require special tools to add coolant properly.
Failure to fill these systems properly could lead to severe
internal engine damage. If any coolant is needed to be added
to the system please contact an authorized dealer.
If the engine coolant (antifreeze) is dirty or contains visible
sediment, have an authorized dealer clean and flush with
OAT coolant (antifreeze) (conforming to MS.90032).
Refer to the “Maintenance Plan” in this section for the proper
maintenance intervals.
Selection Of Coolant
Refer to “Fluids And Lubricants” in “Technical Specifica-
tions” for further information.
NOTE:
• Mixing of engine coolant (antifreeze) other than specified Organic Additive Technology (OAT) engine coolant (anti -
freeze), may result in engine damage and may decrease
corrosion protection. Organic Additive Technology (OAT)
engine coolant is different and should not be mixed with
Hybrid Organic Additive Technology (HOAT) engine
coolant (antifreeze) or any “globally compatible” coolant (antifreeze). If a non-OAT engine coolant (antifreeze) is
introduced into the cooling system in an emergency, the
cooling system will need to be drained, flushed, and
refilled with fresh OAT coolant (conforming to MS.90032),
by an authorized dealer as soon as possible.
• Do not use water alone or alcohol-based engine coolant (antifreeze) products. Do not use additional rust inhibitors
or antirust products, as they may not be compatible with
the radiator engine coolant and may plug the radiator.
• This vehicle has not been designed for use with propylene glycol-based engine coolant (antifreeze). Use of propylene
glycolbased engine coolant (antifreeze) is not recom -
mended.
• Some vehicles require special tools to add coolant prop -
erly. Failure to fill these systems properly could lead to
severe internal engine damage. If any coolant is needed to
be added to the system please contact an authorized
dealer.
7

524 SERVICING AND MAINTENANCE
Adding Coolant
Your vehicle has been built with an improved engine coolant
(OAT coolant conforming to MS.90032) that allows extended
maintenance intervals. This engine coolant (antifreeze) can
be used up to ten years or 150,000 miles (240,000 km) beforereplacement. To prevent reducing this extended mainte -
nance period, it is important that you use the same engine
coolant (OAT coolant conforming to MS.90032) throughout
the life of your vehicle.
Please review these recommendations for using Organic
Additive Technology (OAT) engine coolant (antifreeze) that
meets the requirements of FCA Material Standard MS.90032.
When adding engine coolant (antifreeze):
• We recommend using Mopar Antifreeze/Coolant 10 Year/150,000 Mile (240,000 km) Formula OAT (Organic
Additive Technology) that meets the requirements of FCA
Material Standard MS.90032.
• Mix a minimum solution of 50% OAT engine coolant that meets the requirements of FCA Material Standard
MS.90032 and distilled water. Use higher concentrations
(not to exceed 70%) if temperatures below −34°F (−37°C)
are anticipated. Please contact an authorized dealer for
assistance. • Use only high purity water such as distilled or deionized
water when mixing the water/engine coolant (antifreeze)
solution. The use of lower quality water will reduce the
amount of corrosion protection in the engine cooling
system.
NOTE:
• It is the owner's responsibility to maintain the proper level of protection against freezing according to the tempera -
tures occurring in the area where the vehicle is operated.
• Some vehicles require special tools to add coolant prop -
erly. Failure to fill these systems properly 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 recom -
mended and can result in cooling system damage. If
HOAT and OAT coolant are mixed in an emergency, have
an authorized dealer drain, flush, and refill with OAT
coolant (conforming to MS.90032) as soon as possible.

SERVICING AND MAINTENANCE 525
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant (anti-
freeze) 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 accu-
mulation of foreign material on the sealing surfaces. Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is a regu-
lated 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 — 6.4L Engine
The level of the coolant in the pressurized coolant bottle
should be between the “MIN” and “MAX” range on the
bottle when the engine is cold.
The radiator normally remains completely full, so there is no
need to remove the cap unless checking for coolant freeze
point or replacing engine coolant (antifreeze). Advise your
service attendant of this. As long as the engine operating
temperature is satisfactory, the coolant bottle need only be
checked once a month. When additional engine coolant
(antifreeze) is needed to maintain the proper level, it should
be added to the coolant bottle. Do not overfill.
WARNING!
• Do not open hot engine cooling system. Never add engine coolant (antifreeze) when the engine is over -
heated. Do not loosen or remove the cap to cool an over -
heated 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.
7

526 SERVICING AND MAINTENANCE
Points To Remember
NOTE:
When the vehicle is stopped after a few miles/kilometers of
operation, you may observe vapor coming from the front of
the engine compartment. This is normally a result of mois-
ture from rain, snow, or high humidity accumulating on the
radiator and being vaporized when the thermostat opens,
allowing hot engine coolant (antifreeze) to enter the radiator.
If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be safely
driven. The vapor will soon dissipate.
• Do not overfill the coolant expansion bottle.
• Check the coolant freeze point in the radiator and in the coolant expansion bottle. If engine coolant (antifreeze)
needs to be added, the contents of the coolant expansion
bottle must also be protected against freezing.
• If frequent engine coolant (antifreeze) additions are required, the cooling system should be pressure tested for
leaks. • Maintain engine coolant (antifreeze) concentration at a
minimum of 50% OAT coolant (conforming to MS.90032)
and distilled water for proper corrosion protection of your
engine which contains aluminum components.
• Make sure that the coolant expansion bottle overflow hoses are not kinked or obstructed.
• Keep the front of the radiator clean. If your vehicle is equipped with air conditioning, keep the front of the
condenser clean.
• Do not change the thermostat for Summer or Winter oper -
ation. If replacement is ever necessary, install ONLY the
correct type thermostat. Other designs may result in unsat -
isfactory engine coolant (antifreeze) performance, poor
gas mileage, and increased emissions.

TECHNICAL SPECIFICATIONS 571
FLUID CAPACITIES
U.S.Metric
Fuel (Approximate)
2500/3500 Shortbed Models 31 Gallons117 Liters
2500/3500 Longbed Models 32 Gallons121 Liters
Engine Oil With Filter
6.4L Engine (We recommend you use SAE 0W-40 engine oil meeting the
requirements of FCA Material Standard MS-12633 for use in all operating
temperatures.) 7 Quarts
6.6 Liters
Cooling System
6.4L Engine – (We recommend you use Mopar Antifreeze/Coolant 10
Year/150,000 Mile Formula that meets the requirements of FCA Material
Standard MS.90032.) 16.6 Quarts
15.7 Liters
8

572 TECHNICAL SPECIFICATIONS
FLUIDS AND LUBRICANTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine Coolant We recommend you use Mopar Antifreeze/Coolant 10
Year/150,000 Mile Formula OAT (Organic Additive
Technology).
Engine Oil – 6.4L For best performance and maximum protection under all
types of operating conditions, the manufacturer only
recommends full synthetic engine oils that meet the
American Petroleum Institute (API) categories of SN. The
manufacturer recommends the use of Pennzoil Ultra 0W-40
or equivalent Mopar engine oil meeting the requirements of
FCA Material Standard MS-12633 for use in all operating
temperatures.
Engine Oil Filter We recommend you use Mopar brand Engine Oil Filters.
Spark Plugs We recommend you use Mopar Spark Plugs.
Fuel Selection – 6.4L Engines 89 Octane Recommended - 87 Octane Acceptable, 0-15%
Ethanol.