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The 6 Properties of a Good Engine Coolant

9 Sep, 2019

Engine coolant is a fluid mixture that aids heat transfer plus ensures the optimum operating temperature of most fossil-fuel-powered engines. 

Its primary function is to keep the engine at a constant safe operating temperature but also, with the addition of other chemicals called inhibitors, to control the formation of scale and rust. Inhibitors also prevent cavitation, that is, oxidation from water passing through the cooling system. Anti-freeze / Anti-Boil coolants lower the freezing point of the coolant while raising the boiling point. Corrosion inhibitors have little or no Anti-Freeze / Anti-Boil properties and are used primarily to protect surface materials in the cooling system from corrosion. 

What types of Coolant? 

Type A and Type B are the two main categories of coolant. Type A has an Anti-Freeze Anti-Boil package included present as Ethylene Glycol or similar, an additive package which raises the boiling point of the water and lowers the freezing point. Type B does not have an Anti-Freeze Anti-Boil additive package added and are true corrosion inhibitors only with no or little AF/AB properties. There are different formulations of both Type A and Type B. Some are not compatible. 

A good coolant will provide the following: 

  1. Good heat transfer. 
  2. Protection against deposits. 
  3. High-temperature protection. 
  4. Safe to use with hard waters. 
  5. Won’t damage and be neutral with internal components 
  6. Reduced foaming tendency. 

A bad coolant will provide none of the above.

Coolant Colour

Just because a coolant is coloured doesn’t mean it’s an antifreeze anti-boil product or a corrosion inhibitor. The colour in the coolant is a dye and should never be used to distinguish the type of coolant. Many OEM manufacturers add dye in their coolant mainly to aid in the identification of brand (specific to that make) or type of coolant. Aftermarket manufacturers usually use dye to differentiate the type. Type A or Type B should be clearly labelled on the packaging. The OEM manufacturer will indicate what is suitable for the vehicle and is usually found in the owner’s service appendix. 

Some coolants are not compatible with one another? 

Some type A coolants are not compatible with each other. Organic Acid Technology coolants are not compatible with conventional type anti-freeze types. Also available are Hybrid types which combine the properties of OAT with conventional type and these should not be used in systems that contain conventional type A Anti-Freeze / Ant Boil coolants. So if any uncertainty is in mind the best way to make sure is that the cooling system is completely flushed and cleaned using a good quality cooling system flush before a new fill of Anti- Freeze / Anti -Boil or Corrosion Inhibitor.

Find out more about the range of high quality coolants that are available from CoolDrive below!

Jayrad Premium Cooltech Coolants

CTECH20 Jayrad Premium Cooltech Anti-Freeze / Anti-Boil Coolant

  • Premium Type A Long life Anti-Freeze Anti-Boil concentrate
  • 4 years or 1 million kilometre protection when mixed at a rate of 50% with clean water. Refer OEM specifications for mix rates
  • Maximum engine protection and silicate Free
  • Provides premium cavitation and liner pitting protection as contains high rate of 1010 g/L of Mono Ethylene Glycol
  • OAT (organic additive technology based)
  • Suitable for ferrous and aluminium alloy engine constructions
  • Recommended for all general aftermarket servicing of passenger vehicles, heavy duty trucks and stationary engines including mining equipment
  • Exceeds a wide range of National, International and OEM standards
  • Available in Green, Red, Blue & Pink to match original OEM dyes
  • Interchanges with Tectaloy Long Life AF/AB
  • 20L drum with tap provision

CPM20 Jayrad Premium Cool Plus Max Type B Corrosion Inhibitor

  • Premium water based corrosion inhibitor concentrate
  • 3 years or 100,000 kilometre protection. 1 Litre of Cool Plus Max treats 20 Litres of demineralised water
  • Maximum corrosion protection & is phosphate, amine, nitrate & silicate free. Contains a pH buffered blend of additives to guard against corrosion of steel, aluminium, brass copper and solder
  • OAT (organic additive technology based)
  • Suitable for ferrous and aluminium alloy engine constructions
  • Recommended for all general aftermarket servicing of passenger vehicles, heavy duty trucks and stationary engines including mining equipment where a corrosion inhibitor is specified by the OEM manufacturer
  • Exceeds a wide range of National, International and OEM standards
  • Available in Green & Red
  • 20L Drum with Tap provision
  • Interchanges with Tectaloy Xtra Cool Gold

CSF20 Jayrad Premium Cooling System Flush

  • Premium cooling system flush specially formulated to remove sludge, grease and scale from radiators and cooling system water jackets
  • Non-acidic, non-solvent and biodegradable for safe use on cast iron and alloy engines
  • Will not affect or degrade water pump, seals, radiator hoses or internal components
  • Standard dose rate of 500ml per cooling system up to 10 litres can be overdosed up to 1L per 10 litres for extremely dirty systems.
  • Can be added to existing coolant but best results achieved when applied with clean water after old coolant has been removed
  • Safe and will not damage or stain external surfaces
  • 20L Drum with tap provision
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