ANTIFREEZE COOLANT OR RADIATOR COOLANT
Why does Brake Fluid need to be replaced periodically ?
The Brake Fluid should be replaced every
Two years or 40,000 Kilometers. As Brake Fluid absorbs
moisture so approx. 3% moisture contains the Brake fluid within 2
years, due to this the Fluid Boiling Point
(ERBP) also reduces drastically. This causes a number of problems:
1) Viscosity rises in low temperature so more force to be applied
for brakes every time.
2) Spongy brake paddle due to Vapour lock.
3) Brake failures due to ice crystals in brake systems.
4) Moisture wears the component failure due to internal rust
An average a brake is operated about 72,000 times in a year
due to so much operation, a fine particle of rust sludge has formed due to moisture
, which may causes following problems :
1) May chock the brake lines.
2) Increase the viscosity of brake fluid for apply the more
force is required every time and
indirectly it takes more time to apply the brake in full strength
thus accident chance has increased.
Therefore, it is recommended Brake Fluid should change on every
Ques 2: What is the significant
of color in Brake Fluid?
Ans : Presently
brake fluid is available in Blue, Crimson Red, Pale Yellow &
colorless (Water White).
The color is only mixed in brake fluid to detect the leakage
easily. The Dye has no others role in brake
fluid and also not effect the quality of the brake fluid what
so ever the color of liquid.
Ques 3: Which
impurity is most effect the brake fluid ?
Ans : The mineral
oil based product like Diesel, Kerosene, Gear oil, Petrol.,
Lube oil, Transmission oil and
Greases etc are most effected the rubber parts of the brake
assembly and if it is more than 0.25 % in the
brake fluid the rubber part starts swell beyond the limit and
starts deteriorated immediately.
Ques 4: What
precaution should be taken for Brake fluid ?
Ans : The following
precaution should be taken for Brake Fluid :
1) Don’t clean brake system components with petroleum
solvents as they will contaminate brake fluid. Use brake fluid
2) Don’t lubricate brake system components with petroleum
greases or oil. Use fresh Brake Fluid as lubricant.
3) Never re-use Brake Fluid.
4) Never use the Silicon based Brake Fluid (DOT 5) in race car system.
5) Never mix Silicon Brake Fluid (DOT 5) with glycol based Brake Fluid.
If the Brake Fluid consumption is small. Use smeller containers
that can be used quickly.
If fluid remains in container be sure to tightly seal &
do not store for long period of times.
Immediately replace master cylinder reservoir cap following
For Brake Fluid Details please click Here
ANTIFREEZE COOLANT OR RADIATOR
Ques 1: What is the different
between Conventional & Extended life Coolant ?
Ans : There is
only difference between additives of both Coolant. Conventional
type coolant contain the
inorganic additive in major portion & life extended Coolant
contains organic acid additive in major portion. The additive
of conventional degrades fast so its life is short & life
extended additive degrades slowly so its life is longer. The
conventional & life extended should not be mixed together.
Ques 2: What are main bases of
the Antifreeze Coolant ?
Ans : Antifreeze
Coolant are based upon :
(I) Mono Ethylene Glycol (MEG)
(II) Mono Propylene Glycol (MPG)
The MEG based Coolant is more toxic than MPG but the MEG is
cheaper & easily available. Therefore, major share is based
upon MEG base.
Ques 3: Why water is recommended
to mix with the Coolant?
Ans : (a) Water
is one of the cheapest & every where available solvent &
it is also bio-degradable, environment
friendly, non toxic & non reactive product.
(b) The heat transfer property of the water is much higher than
other similar products so it keeps engine cool, efficient &
indirectly less power is required to circulate the coolant.
The size of radiator, pump & engine body can be reduced
(c) Water reduces the freezing point & increases the boiling
point of the coolant.
(d) Water activates the corrosion inhibitor which is mixed in
Ques 4: What is the significant
of the colour in Antifreeze Coolant ?
Ans : The Coolant
is available in Blue, Greenish, Yellow, Orange, Red & Amber
colored. The colour is mixed in the coolant to detect the leakage
easily. The color of the material has no other role in Antifreeze
Coolant. Initially it is assumed that Orange, Red & Amber
colored Coolants are Life Extended Coolant and Blue, Greenish,
etc., are conventional type but now, a days it is not so.
Ques 5: Why 100% water can not
be used as a Coolant ?
Ans : Water has
very good heat transfer property than other Coolant materials
but it is also most corrosive material in comparison with other
Coolant materials. The ordinary water always contains some dissolved
minerals, so after evaporation of the water these impurities
remain in Coolant & formed a Scale in Coolant System, thus
reduced the heat transfer property of the engine. Therefore,
100% water has spoiled the coolant system due to corrosion &
scale. The evaporation rate of water is higher in comparison
with Glycols so the topping & the addition of water is required
many times than other materials & each time it leaves a
more scale in the system. The distilled & demineralise water
have own their problems like affinity to the Aluminium metal
etc. The Freezing point of water is 0º C and in the world
there are so many regions where the temperature goes below 0º
C in winter and the water is freezed in vehicles and became non-
For Coolant Details please click Here