The answer for a 2002 Durango, however 1999-2000 is different!

ethylene glycol base coolant with organic corrosion inhibitors (called HOAT, for Hybrid Organic Additive Technology).


You will have to look at the back bottle to figure out exactly what type it is.


DESCRIPTION - ENGINE COOLANT
WARNING: ANTIFREEZE IS AN ETHYLENE GLYCOL
BASE COOLANT AND IS HARMFUL IF SWALLOWED
OR INHALED. IF SWALLOWED, DRINK
TWO GLASSES OF WATER AND INDUCE VOMITING.
IF INHALED, MOVE TO FRESH AIR AREA.
SEEK MEDICAL ATTENTION IMMEDIATELY. DO NOT
STORE IN OPEN OR UNMARKED CONTAINERS.
WASH SKIN AND CLOTHING THOROUGHLY AFTER
COMING IN CONTACT WITH ETHYLENE GLYCOL.
KEEP OUT OF REACH OF CHILDREN. DISPOSE OF
GLYCOL BASE COOLANT PROPERLY, CONTACT
YOUR DEALER OR GOVERNMENT AGENCY FOR
LOCATION OF COLLECTION CENTER IN YOUR
AREA. DO NOT OPEN A COOLING SYSTEM WHEN
THE ENGINE IS AT OPERATING TEMPERATURE OR
HOT UNDER PRESSURE, PERSONAL INJURY CAN
RESULT. AVOID RADIATOR COOLING FAN WHEN
ENGINE COMPARTMENT RELATED SERVICE IS
PERFORMED, PERSONAL INJURY CAN RESULT.
DN LUBRICATION & MAINTENANCE 0 - 3
FLUID TYPES

CAUTION: Use of Propylene Glycol based coolants
is not recommended, as they provide less freeze
protection and less corrosion protection.
The cooling system is designed around the coolant.
The coolant must accept heat from engine metal, in
the cylinder head area near the exhaust valves and
engine block. Then coolant carries the heat to the
radiator where the tube/fin radiator can transfer the
heat to the air.

The use of aluminum cylinder blocks, cylinder
heads, and water pumps requires special corrosion
protection. Mopart Antifreeze/Coolant, 5
Year/100,000 Mile Formula (MS-9769), or the equivalent
ethylene glycol base coolant with organic corrosion
inhibitors (called HOAT, for Hybrid Organic
Additive Technology) is recommended. This coolant
offers the best engine cooling without corrosion when
mixed with 50% Ethylene Glycol and 50% distilled
water to obtain a freeze point of -37°C (-35°F). If it
loses color or becomes contaminated, drain, flush,
and replace with fresh properly mixed coolant solution.
CAUTION: MoparT Antifreeze/Coolant, 5
Year/100,000 Mile Formula (MS-9769) may not be
mixed with any other type of antifreeze. Mixing of
coolants other than specified (non-HOAT or other
HOAT), may result in engine damage that may not
be covered under the new vehicle warranty, and
decreased corrosion protection.

COOLANT PERFORMANCE
The required ethylene-glycol (antifreeze) and water
mixture depends upon climate and vehicle operating
conditions. The coolant performance of various mixtures
follows:

Pure Water-Water can absorb more heat than a
mixture of water and ethylene-glycol. This is for purpose
of heat transfer only. Water also freezes at a
higher temperature and allows corrosion.
100 percent Ethylene-Glycol-The corrosion
inhibiting additives in ethylene-glycol need the presence
of water to dissolve. Without water, additives
form deposits in system. These act as insulation
causing temperature to rise to as high as 149°C
(300°F). This temperature is hot enough to melt plastic
and soften solder. The increased temperature can
result in engine detonation. In addition, 100 percent
ethylene-glycol freezes at -22°C (-8°F).
50/50 Ethylene-Glycol and Water-Is the recommended
mixture, it provides protection against freezing
to -37°C (-34°F). The antifreeze concentration
must always be a minimum of 44 percent, year round
in all climates. If percentage is lower, engine
parts may be eroded by cavitation. Maximum protection
against freezing is provided with a 68 percent
antifreeze concentration, which prevents freezing
down to -67.7°C (-90°F). A higher percentage will
freeze at a warmer temperature. Also, a higher percentage
of antifreeze can cause the engine to overheat
because specific heat of antifreeze is lower than
that of water.

CAUTION: Richer antifreeze mixtures cannot be
measured with normal field equipment and can
cause problems associated with 100 percent ethylene-
glycol.

COOLANT SELECTION AND ADDITIVES

NOTE: Refer to the vehicle’s coolant bottle to identify
HOAT or Non-HOAT coolant. Non-HOAT coolant
is green in color.
The use of aluminum cylinder blocks, cylinder
heads and water pumps requires special corrosion
protection. Only Mopart Antifreeze/Coolant, 5
Year/100,000 Mile Formula (glycol base coolant with
corrosion inhibitors called HOAT, for Hybrid Organic
Additive Technology) is recommended. This coolant
offers the best engine cooling without corrosion when
mixed with 50% distilled water to obtain to obtain a
freeze point of -37°C (-35°F). If it loses color or
becomes contaminated, drain, flush, and replace with
fresh properly mixed coolant solution.
CAUTION: Do not use coolant additives that are
claimed to improve engine cooling.

 

taking your radiator cap off to the best of my knowledge does not allow air in... only way i know of air getting in is if you drain the system and dont fill and burp it properly

 

OK, that makes sense. I'm gonna wait for a couple of guys to jump in and confirm this as well.

And hydra thats a lot of info. but useful as always, right?

 

You can get air in the system with taking off your radiator cap off the 2000-2003 models because the inline type that they switched to in 2000+ is lower then the top of the radiator. Once you get all the air out on fill (with heater running on hot high and engine running) you get the pressure built up and bleed the system and when it cools it pulls coolant back in from the overflow as long as the bleed screw is closed during cooling.

P.S.....That's why they have "Bleed Instructions" from the factory.

 

oh thats right... they changed from my model year...

 

That's not the case with my 02. The in-line radiator cap sits ~4" higher than the top of the radiator. However, the section of hose between the cap and t-stat actually arches upward and over a/c lines. I guess air could get trapped in that area with the cap removed.

 

they are talking about the 4.7 not the 5.9, they just arent clarifying that for you, the 5.9 has a higher radiator cap so it doesnt have a special burping procedure, the 4.7 does.

 

oh, I see.

 

oh well then that makes sense... and i was right lol... didn't remember we were talkin bout a 4.7...

 

Yeah, so replace the cap and burp the system with the engine running?