I never really noticed a consensus here, so figured it would be worth asking.
Our '94 Acclaim 3.0L came to us last year with DexCool in it (pink). The
factory shop manual says to use glycol, then adds all sorts of stipulations
to that, such as:
"50/50 Glycol and Water (.82 btu) is the recommended combination... The
radiator, water pump, engine water jacket, radiator pressure cap, thermostat,
temperature gauge, sending unit and heater are all designed for 50/50
"Where required, a 56 percent glycol and 44 percent water mixture will
provide a freeze point of -59C (-50F).
"CAUTION: Richer mixtures cannot be measured with field equipment which
can lead to problems associated with 100 percent glycol." (this last is
all in boldface, and it makes absolutely no sense to me)
"The use of aluminum cylinder heads, intake manifolds, and water pumps
requires special corrosion protection. Mopar Antifreeze, Prestone II,
Peak or antifreeze containing Alugard 340-2, or their equivalent are
recommended for best engine cooling without corrosion. When mixed only to
a freeze point of -37C (-35F) to -59C (-50F). [sic] If it looses [sic]
color or becomes contaminated, drain, flush, and replace with fresh
properly mixed solution."
"Use only 50/50 concentration of ethylene glycol type antifreeze and
The previous owner seemed to have most of his service done by a Plymouth
dealer. Could the dealer have substituted the DexCool for some reason?
Does DexCool make any kind of sense in this car? Why would they be so
concerned that the mix be between 50/50 and 56/44?
If it makes any difference, the current coolant registered about -45F
on my Prestone plastic tester (the kind with the large red plastic
needle indicator). I plan to replace the coolant soon anyway.
- posted 13 years ago