POWERTRAIN
ESOC COMMERCIAL TRUCK
MAINTENANCING DIESEL COOLING SYSTEMS MADE
EASY WITH ESOC’S CEX SERIES
ELIMINATE AIR POCKETS IN YOUR COOLING SYSTEM
ELIMINATING THE NEED FOR REPEATED “BURPING”
SERIES CEX-32
32 GALLON CAPACITY
November/December 2018 | VehicleServicePros.com 43
up in cold temperatures, they also actively
fight metal corrosion within the engine.
Corrosion, and rust in particular, can
degrade the effectiveness of an AF/C system,
negatively impacting performance and the
long-term health of the engine. Given the
multitude of metals making up any engine,
it is important to understand the need for
corrosion protection.
With the seemingly
innocuous decision to
merely add water to a cooling
system, a heavy duty
cooling system can incur
corrosion from this unintended
dilution, as well as
a loss of protection, leading
to an increased incidence
of liner pitting.
While most coolants
will protect a heavy duty
engine from freezing up in
cold temperatures, they also
need to actively fi ght metal
corrosion within the engine
cooling system. Corrosion
can degrade the eff ectiveness
of a cooling system by
generating deposits in heat
exchangers and negatively
impacting the performance
of the radiator to remove
heat from the system.
Test coolant levels
Testing coolant levels is
essential for protecting a
heavy duty engine. If the
glycol concentration is too
rich or too low, freezing and
boilover protection becomes
a problem, as can changes in
the level of inhibitors necessary
to protect the essential
engine components.
Fleets running in extreme
cold conditions might
decide to push the glycol
levels to the upper limits
(a maximum of 70 percent
is recommended) for optimum
freeze point protection.
Extreme care at these
concentrate levels must
be exhibited when warm
temperatures approach. Th e
coolant concentrate needs
to be rebalanced to recommended
concentrations of
50 percent to optimize the
heat transfer properties
of the coolant (the ability
to keep the vehicle from
overheating).
Excessive levels of glycol
and relatively low levels
of water create a pool heat
transfer environment that
will encourage higher
underhood temperatures, overall cooling
system fatigue and potential engine overheating
and failure, while insuffi cient glycol
percentages can also compromise corrosion
additive eff ectiveness.
Proactively testing engine coolant is
essential to making the right decisions for
maintaining the correct levels of coolant
concentrations. Th ere are a number of testing
options that off er the ability to test a wide
range of important coolant variables from
basic glycol concentration, to far more extensive
methods that measure conditions of the
fl uid and the ability of the coolant to protect
the engine from corrosion by measuring the
level of inhibitors.
SERIES CEX-14
14 GALLON CAPACITY
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Winter is Coming . . .
Now is the time to
maintenance your
coolant system!
PRESSURE & VACUUM TEST YOUR
SYSTEM WITH EASE
ELIMINATE NEED FOR TECH TO COME IN
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