ACtion Magazine - March 2017 - 27


By Lauren Lewis

An introduction to
heavy-duty coolant
technology and
best practices

C

oolant has a few basic jobs in a vehicle's engine, not the least of which
is to absorb heat from components and
dissipate it through the radiator into
the surrounding air.
But the work is more demanding in a heavy-duty
diesel.
The typical engine in a commercial truck, bus,
or piece of off-highway equipment uses a wetsleeve design, which means the pistons operate in
cylinders surrounded by cast iron liners that come
into direct contact with the coolant.
The combustion process causes these liners to
vibrate rapidly, like a bell. This produces tiny vapor
bubbles on the liner wall, and they implode with
enough force to take little chunks out of the sleeve
liner when they collapse. Left unchecked, these
cavities will perforate the liner and allow coolant
to mix with oil-a potentially catastrophic situation
for the engine.
Heavy-duty coolant circulates chemicals to protect from this type of damage. In addition to removing heat and protecting liners, the coolant must
to not react with the various materials it touches-
aluminum, cast iron, copper, brass, and solder, plus
non-metallic components like hoses and gaskets,
including silicone. If the pH balance is too low, it
can corrode cylinder blocks, heads, and liners. If
it's too high, it can harm gaskets and softer metals.
These are big tasks in addition to protecting
against freezing and boil-over. Furthermore, the
coolant's chemical condition is constantly changing, so it's important to maintain it as you would
any other component on the vehicle.
Coolant classification
There are green coolants, red coolants, blue
coolants, yellow coolants... In fact all heavy-duty
coolant starts out as a colorless blend of water and a
base, the most common being ethylene glycol (EG).

March 2017 * ACTION

27



Table of Contents for the Digital Edition of ACtion Magazine - March 2017

Outlook
Service Port
Leonard's Law
Virtual View
Cooling Corner
Member Profile
Radiator service and repair
What you don't know can hurt your diesel engine
Industry News
Association News
New Products and Services
Last Watch
ACtion Magazine - March 2017 - Cover1
ACtion Magazine - March 2017 - Cover2
ACtion Magazine - March 2017 - 3
ACtion Magazine - March 2017 - 4
ACtion Magazine - March 2017 - 5
ACtion Magazine - March 2017 - Outlook
ACtion Magazine - March 2017 - 7
ACtion Magazine - March 2017 - Service Port
ACtion Magazine - March 2017 - 9
ACtion Magazine - March 2017 - Leonard's Law
ACtion Magazine - March 2017 - 11
ACtion Magazine - March 2017 - Virtual View
ACtion Magazine - March 2017 - 13
ACtion Magazine - March 2017 - Cooling Corner
ACtion Magazine - March 2017 - 15
ACtion Magazine - March 2017 - Member Profile
ACtion Magazine - March 2017 - 17
ACtion Magazine - March 2017 - 18
ACtion Magazine - March 2017 - 19
ACtion Magazine - March 2017 - Radiator service and repair
ACtion Magazine - March 2017 - 21
ACtion Magazine - March 2017 - 22
ACtion Magazine - March 2017 - 23
ACtion Magazine - March 2017 - 24
ACtion Magazine - March 2017 - 25
ACtion Magazine - March 2017 - What you don't know can hurt your diesel engine
ACtion Magazine - March 2017 - 27
ACtion Magazine - March 2017 - 28
ACtion Magazine - March 2017 - 29
ACtion Magazine - March 2017 - 30
ACtion Magazine - March 2017 - 31
ACtion Magazine - March 2017 - 32
ACtion Magazine - March 2017 - Industry News
ACtion Magazine - March 2017 - 34
ACtion Magazine - March 2017 - Association News
ACtion Magazine - March 2017 - New Products and Services
ACtion Magazine - March 2017 - 37
ACtion Magazine - March 2017 - Last Watch
ACtion Magazine - March 2017 - Cover3
ACtion Magazine - March 2017 - Cover4
https://www.nxtbook.com/nxtbooks/macs/action_20170708
https://www.nxtbook.com/nxtbooks/macs/action_20176
https://www.nxtbook.com/nxtbooks/macs/action_201706
https://www.nxtbook.com/nxtbooks/macs/action_201705
https://www.nxtbook.com/nxtbooks/macs/action_201704
https://www.nxtbook.com/nxtbooks/macs/action_201703
https://www.nxtbook.com/nxtbooks/macs/action_20170102
https://www.nxtbook.com/nxtbooks/macs/action_20161112
https://www.nxtbook.com/nxtbooks/macs/action_20160910_v2
https://www.nxtbook.com/nxtbooks/macs/action_20160910
https://www.nxtbook.com/nxtbooks/macs/action_20160708
https://www.nxtbook.com/nxtbooks/macs/action_napa_2016spring
https://www.nxtbook.com/nxtbooks/macs/action_201606
https://www.nxtbook.com/nxtbooks/macs/action_201605
https://www.nxtbook.com/nxtbooks/macs/action_201604
https://www.nxtbook.com/nxtbooks/macs/action_201603
https://www.nxtbook.com/nxtbooks/macs/action_20160102
https://www.nxtbook.com/nxtbooks/macs/action_20151112
https://www.nxtbook.com/nxtbooks/macs/action_20150910
https://www.nxtbook.com/nxtbooks/macs/action_20150708
https://www.nxtbook.com/nxtbooks/macs/action_napa_2015spring
https://www.nxtbook.com/nxtbooks/macs/action_napa_2015spring_v2
https://www.nxtbook.com/nxtbooks/macs/action_201506
https://www.nxtbook.com/nxtbooks/macs/action_201505
https://www.nxtbook.com/nxtbooks/macs/action_201504
https://www.nxtbook.com/nxtbooks/macs/action_201503
https://www.nxtbook.com/nxtbooks/macs/action_20150102
https://www.nxtbook.com/nxtbooks/macs/action_20141112
https://www.nxtbook.com/nxtbooks/macs/action_201409
https://www.nxtbook.com/nxtbooks/macs/action_20140708
https://www.nxtbook.com/nxtbooks/macs/action_201406
https://www.nxtbook.com/nxtbooks/macs/action_201405
https://www.nxtbook.com/nxtbooks/macs/action_201404
https://www.nxtbook.com/nxtbooks/macs/action_201403
https://www.nxtbook.com/nxtbooks/macs/action_20140102
https://www.nxtbook.com/nxtbooks/macs/action_20131112
https://www.nxtbook.com/nxtbooks/macs/action_20130910
https://www.nxtbook.com/nxtbooks/macs/action_201307
https://www.nxtbook.com/nxtbooks/macs/action_201306
https://www.nxtbook.com/nxtbooks/macs/action_201305
https://www.nxtbook.com/nxtbooks/macs/action_201304
https://www.nxtbook.com/nxtbooks/macs/action_201303
https://www.nxtbook.com/nxtbooks/macs/action_20130102
https://www.nxtbook.com/nxtbooks/macs/action_20121112
https://www.nxtbook.com/nxtbooks/macs/action_20120910
https://www.nxtbook.com/nxtbooks/macs/action_201207
https://www.nxtbook.com/nxtbooks/macs/action_201206
https://www.nxtbook.com/nxtbooks/macs/action_201205
https://www.nxtbook.com/nxtbooks/macs/action_20120304
https://www.nxtbook.com/nxtbooks/macs/action_20120102
https://www.nxtbook.com/nxtbooks/macs/action_20111112
https://www.nxtbook.com/nxtbooks/macs/action_20110910
https://www.nxtbookmedia.com