180* Thermostat Install or leave the 195* on???
#11
01-09-2011 | 01:37 PM
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It seemed almost like an intermittent problem, because I cleared the code the first time and it ran ok for awhile then set the same code(low coolant temp) again. Seems like 180 may be borderline for the coolant range that the ECM likes? Also, could be coolant temp sensor is inaccurate, maybe out of tolerance. I am thinking of trying again, see what happens.
#12
01-09-2011 | 01:42 PM
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From: Greenfield, Wisconsin
#14
02-09-2011 | 08:13 PM
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From: N.Alabama
It tends to not heat the fuel /air as much, making a denser charge. Am I way off base or is the reccomended coolant mix for our trucks closer to a 70/30 or 80/20. I may be wrong because I generally deal with the older style magnums (3.9, 5.2, 5.9) as opposed to the 3.7, 4.7. they may be 50/50
#15
02-09-2011 | 08:56 PM
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Posts: 115
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From: Maine
It tends to not heat the fuel /air as much, making a denser charge. Am I way off base or is the reccomended coolant mix for our trucks closer to a 70/30 or 80/20. I may be wrong because I generally deal with the older style magnums (3.9, 5.2, 5.9) as opposed to the 3.7, 4.7. they may be 50/50
STANDARD PROCEDURE—REFILLING
COOLING SYSTEM 3.9L/5.9L ENGINE
WARNING: DO NOT REMOVE CYLINDER BLOCK
DRAIN PLUGS OR LOOSEN RADIATOR DRAINCOCK
WITH SYSTEM HOT AND UNDER PRESSURE.
SERIOUS BURNS FROM COOLANT CAN OCCUR.
DO NOT WASTE reusable coolant. If solution is
clean, drain coolant into a clean container for reuse.
Clean cooling system prior to refilling. (Refer to 7 -
COOLING - STANDARD PROCEDURE).
(1) Install cylinder block drain plugs. Coat the
threads with Mopart Thread Sealant with Teflon.
(2) Close radiator petcock.
(3) Fill cooling system with a 50/50 mixture of
water and antifreeze.
(4) Fill coolant reserve/overflow tank to FULL
mark on indicator stick.
(5) Start and operate engine until thermostat
opens (upper radiator hose warm to touch).
(6) If necessary, add a 50/50 water and antifreeze
mixture to the coolant reserve/overflow tank. This is
done to maintain coolant level between the FULL
and ADD marks. The level in the reserve/overflow
tank may drop below the ADD mark after three or
four warm-up and cool-down cycles.
COOLING SYSTEM 3.9L/5.9L ENGINE
WARNING: DO NOT REMOVE CYLINDER BLOCK
DRAIN PLUGS OR LOOSEN RADIATOR DRAINCOCK
WITH SYSTEM HOT AND UNDER PRESSURE.
SERIOUS BURNS FROM COOLANT CAN OCCUR.
DO NOT WASTE reusable coolant. If solution is
clean, drain coolant into a clean container for reuse.
Clean cooling system prior to refilling. (Refer to 7 -
COOLING - STANDARD PROCEDURE).
(1) Install cylinder block drain plugs. Coat the
threads with Mopart Thread Sealant with Teflon.
(2) Close radiator petcock.
(3) Fill cooling system with a 50/50 mixture of
water and antifreeze.
(4) Fill coolant reserve/overflow tank to FULL
mark on indicator stick.
(5) Start and operate engine until thermostat
opens (upper radiator hose warm to touch).
(6) If necessary, add a 50/50 water and antifreeze
mixture to the coolant reserve/overflow tank. This is
done to maintain coolant level between the FULL
and ADD marks. The level in the reserve/overflow
tank may drop below the ADD mark after three or
four warm-up and cool-down cycles.
#17
02-10-2011 | 12:41 PM
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Joined: Dec 2009
Posts: 894
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From: long island, NY
#19
02-10-2011 | 03:22 PM
Professional
Joined: Jan 2011
Posts: 115
Likes: 0
From: Maine
REFILLING 4.7L ENGINE
CAUTION: Failure to follow the procedure outlined
below, can result in engine overheating conditions
and sever damage to engine.
(1) Tighten the radiator draincock and the cylinder
block drain plug(s) (if removed).
(2) Fill system using a 50/50 mixture of ethyleneglycol
antifreeze and low mineral content water.
(3) Fill coolant reservoir to FULL mark.
(4) Install radiator cap and reservoir cap.
(5) Start engine and run at 3000 RPM for 10 seconds.
(6) Shut engine off.
(7) Remove radiator cap.
(8) Fill radiator to full level.
(9) Install the radiator cap.
CAUTION: Failure to follow the procedure outlined
below, can result in engine overheating conditions
and sever damage to engine.
(1) Tighten the radiator draincock and the cylinder
block drain plug(s) (if removed).
(2) Fill system using a 50/50 mixture of ethyleneglycol
antifreeze and low mineral content water.
(3) Fill coolant reservoir to FULL mark.
(4) Install radiator cap and reservoir cap.
(5) Start engine and run at 3000 RPM for 10 seconds.
(6) Shut engine off.
(7) Remove radiator cap.
(8) Fill radiator to full level.
(9) Install the radiator cap.
ETHYLENE-GLYCOL MIXTURES
CAUTION: Richer antifreeze mixtures cannot be
measured with normal field equipment and can
cause problems associated with 100 percent ethylene-
glycol.
The required ethylene-glycol (antifreeze) and water
mixture depends upon the climate and vehicle operating
conditions. The recommended mixture of 50/50
ethylene-glycol and water will provide protection
against freezing to -37 deg. C (-35 deg. F). The antifreeze
concentration must always be a minimum of
44 percent, year-round in all climates. If percentage
is lower than 44 percent, engine parts may be
eroded by cavitation, and cooling system components
may be severely damaged by corrosion.
Maximum protection against freezing is provided
with a 68 percent antifreeze concentration, which
prevents freezing down to -67.7 deg. C (-90 deg. F). A
higher percentage will freeze at a warmer temperature.
Also, a higher percentage of antifreeze can
cause the engine to overheat because the specific
heat of antifreeze is lower than that of water.
Use of 100 percent ethylene-glycol will cause formation
of additive deposits in the system, as the corrosion
inhibitive additives in ethylene-glycol require
the presence of water to dissolve. The deposits act as
insulation, causing temperatures to rise to as high as
149 deg. C (300) deg. 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 deg. C (-8 deg. F ).
PROPYLENE-GLYCOL MIXTURES
It’s overall effective temperature range is smaller
than that of ethylene-glycol. The freeze point of 50/50
propylene-glycol and water is -32 deg. C (-26 deg. F).
5 deg. C higher than ethylene-glycol’s freeze point.
The boiling point (protection against summer boilover)
of propylene-glycol is 125 deg. C (257 deg. F )
at 96.5 kPa (14 psi), compared to 128 deg. C (263
deg. F) for ethylene-glycol. Use of propylene-glycol
can result in boil-over or freeze-up on a cooling system
designed for ethylene-glycol. Propylene glycol
also has poorer heat transfer characteristics than
ethylene glycol. This can increase cylinder head temperatures
under certain conditions.
Propylene-glycol/ethylene-glycol Mixtures can
cause the destabilization of various corrosion inhibitors,
causing damage to the various cooling system
components. Also, once ethylene-glycol and propylene-
glycol based coolants are mixed in the vehicle,
conventional methods of determining freeze point will
not be accurate. Both the refractive index and specific
gravity differ between ethylene glycol and propylene
glycol.
CAUTION: Richer antifreeze mixtures cannot be
measured with normal field equipment and can
cause problems associated with 100 percent ethylene-
glycol.
The required ethylene-glycol (antifreeze) and water
mixture depends upon the climate and vehicle operating
conditions. The recommended mixture of 50/50
ethylene-glycol and water will provide protection
against freezing to -37 deg. C (-35 deg. F). The antifreeze
concentration must always be a minimum of
44 percent, year-round in all climates. If percentage
is lower than 44 percent, engine parts may be
eroded by cavitation, and cooling system components
may be severely damaged by corrosion.
Maximum protection against freezing is provided
with a 68 percent antifreeze concentration, which
prevents freezing down to -67.7 deg. C (-90 deg. F). A
higher percentage will freeze at a warmer temperature.
Also, a higher percentage of antifreeze can
cause the engine to overheat because the specific
heat of antifreeze is lower than that of water.
Use of 100 percent ethylene-glycol will cause formation
of additive deposits in the system, as the corrosion
inhibitive additives in ethylene-glycol require
the presence of water to dissolve. The deposits act as
insulation, causing temperatures to rise to as high as
149 deg. C (300) deg. 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 deg. C (-8 deg. F ).
PROPYLENE-GLYCOL MIXTURES
It’s overall effective temperature range is smaller
than that of ethylene-glycol. The freeze point of 50/50
propylene-glycol and water is -32 deg. C (-26 deg. F).
5 deg. C higher than ethylene-glycol’s freeze point.
The boiling point (protection against summer boilover)
of propylene-glycol is 125 deg. C (257 deg. F )
at 96.5 kPa (14 psi), compared to 128 deg. C (263
deg. F) for ethylene-glycol. Use of propylene-glycol
can result in boil-over or freeze-up on a cooling system
designed for ethylene-glycol. Propylene glycol
also has poorer heat transfer characteristics than
ethylene glycol. This can increase cylinder head temperatures
under certain conditions.
Propylene-glycol/ethylene-glycol Mixtures can
cause the destabilization of various corrosion inhibitors,
causing damage to the various cooling system
components. Also, once ethylene-glycol and propylene-
glycol based coolants are mixed in the vehicle,
conventional methods of determining freeze point will
not be accurate. Both the refractive index and specific
gravity differ between ethylene glycol and propylene
glycol.