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General Information on Material Suitability and performance:

POLYESTER reinforced hoses

Very effective for every day use to carry water, air & coolant.
Suits most engine applications.
Working temperatures are from -50 to +170C, peaking at + 180C
Polyester reinforced hoses are NOT suitable for caring oil or fuel.
Ideal for:

  • Water
  • Air
  • Air intakes
  • Coolant
  • Small amounts of oil mist

NOMEX reinforced hoses

NOMEX (aramid) is ideal for high working temperatures and higher pressure.
Particularly well suited for turbo / boost applications.
Working temperatures from -50 to +220C , peaking at +240C

Nomex reinforced hoses are NOT suitable for caring oil.
Ideal for:

  • Water
  • Air
  • Coolants
  • Turbo boost
  • High temperatures
  • Higher pressures
  • Small amounts of oil mist.

* NOTE: Only available in BLACK - Built to order only

GLASS fabric reinforced hoses

Unique product, and highly specialised. Compared to Polyester & Nomex this is ideal for
VERY high temperatures. Not so good for high pressure.
Working temperatures from -50 to +330C

Glass reinforced hoses are NOT suitable for caring oil
Ideal for:

  • Water
  • Air
  • High Pressure Turbo
  • VERY High temperatures applications
  • Small amounts of oil mist.

GLASS hoses will not resist to Oil, are stiff only straight lengths are possible
Minimum orders apply with glass hoses due to high cost of purchasing, and processing
the raw silicone material which is a special high temperature grade.

* NOTE: A specially formulated HIGH TEMP silicone is used which is pink(ish) in colour
Built to order only (minimum orders of 20 to 25kg of material apply)

FLURO lined hoses

Highly specialised product. Ideal for contact with Oils / Oil mists and fuel Filler hoses.
Working temperatures from -50 to +170C
Good for:

  • Water
  • Air
  • OIL in ASTM 1 and 3 oil mists
  • transfer of fuel (fuel filler hose)  (not suitable for high octane fuels)

Please call Technical Sales if you have further technical questions on any of our products


What you should know about HOSES, HOSE CLAMPS and COOLANT

The upper and lower radiator hoses and heater hoses are all flexible connections between the engine,
radiator, and heater core.  Because of engine vibration, flexible connections are mandatory between these areas.
These hoses must be able to withstand the extreme heat environment under the hood of your vehicle as well as
up to 20 pounds of internal pressure. Because of the wide temperature range of the coolant, they must also be
compatible with below zero to over 250 F temperatures without fail.

Air, coolant, and extreme temperatures all contribute to hose deterioration particularly common with EPDM
natural black rubber hoses.  Each one of these work against the life span of the hoses by causing the hoses
to become hardened, cracked, softened, and swollen. All damage the hoses' flexibility and cause lining failure,
rupturing, and clogging. Not only does this damage cause the hoses to fail, but rubber particles loosened from
the hose linings can cause clogged radiators, heater cores, and thermostats.

A weakened hose may collapse and cause restricted coolant flow and overheating. You must periodically inspect
all coolant hoses for deterioration and flush the cooling system at required intervals to prevent these problems.
Or why not simply upgrade your existing EPMD rubber hoses to Viper Performance Silicone hoses, made from top
quality silicone compound and reinforced fabrics. Viper Performance hoses come with a lifetime warranty.

Hose Clamps:

Hose clamps are used on every coolant connector on an original engine from the manufacturer. Most of the time
these clamps are "one use" versions made of sprung steel that do not like being loosened and re-tightened.
We highly recommend that many of these OEM style clamps are replaced if replacing or removing/installing
coolant hoses. These OEM clamps can get bent or lose their concentricity that allows equal clamping force around
the perimeter of the hose. These cheap spring metal clamps can also cut the hose when tightened. If this happens,
leaks are likely to occur.

For performance and racing applications we recommend T Bolt Style hose clamps, which are available to buy
on the Viper Performance online store. We highly recommend constant tension clamps. 
Alternatively we also highly recommend that AN (Army-Navy) connections in conjunction with steel braided
hoses be used.  These fittings become an integral part of the hose and will thread into the braided hose's 
rubber liner. The connection at the components and engine is also threaded to another fitting.
This type of connection is the most reliable and longest lasting, but it is also considerably more expensive.
Viper Performance can also supply you with a large range of world class braided hoses and fittings.

Coolant & Coolant Additives

Even though some time ago water alone was used for many years in automotive cooling systems,
the fact that it only has a 32 F, freezing point, a 212 F boiling point, it evaporates easily, creates rust and
corrosion, and leaves mineral deposits has made it less than optimal as the sole coolant. It is much more
efficient to utilise a chemical added into the water to improve the efficiency of the coolant.
This chemical is commonly called "Anti-Freeze", but the more accurate name is ethylene glycol (EG).
In recent years (EG) has been replaced by propylene glycol (PG). This is a much less dangerous chemical.


Antifreeze is considered by many to be "one-size-fits-all" as most antifreeze brands have a distinctive
lemon-lime colour.  However, the actual formulations can vary greatly between types, such as the
more recent RED antifreeze. Conventional antifreeze is formulated from an ethylene glycol (EG)
base chemical and can have very serious health risks.

It is estimated that each year 90,000 pets and other wildlife die from accidentally ingesting ethylene
glycol based antifreeze.  Animals are attracted to antifreeze for its sweet smell and taste. Animals,
and children for that matter, can accidentally ingest antifreeze from spills, cooling-system leaks or
improperly stored containers. Because of this there are strict laws and penalties as the result of
contamination of water or ground areas. Even a leaky vehicle can get you into trouble.

As an alternative, automotive chemical manufacturers have formulated a newer type of antifreeze
using propylene glycol (PG) instead of ethylene glycol, which is less harmful if accidentally ingested.
Safer, propylene glycol based antifreeze provides performance and protection comparable to
conventional ethylene glycol based antifreeze in four key areas of engine protection:
boil over, freeze-up, corrosion and heat transfer.

Since antifreeze as a 50-50 mix with water elevates the boiling point to 227 F, and lowers the freezing
point to -27F, it should also be called anti-boil. Good quality antifreeze contains water pump lubricants
to help maintain the efficiency of the pump, rust inhibitors to keep unwanted deposits from forming,
and acid neutralisers to help protect the inside of the radiator, heater core, and hoses from corrosion.

Of course, antifreeze does not last forever, so it is recommended that the coolant be changed at
least every two years or 24,000 miles. However, many vehicle owners allow do not follow this service
interval and allow their cooling systems to become rusty, dirty, or clogged with mineral deposits.
This causes water pump and hose failures, poor performance, overheating, and other component
failures. To eliminate these problems it is best to have your vehicle's cooling system flushed in a
professional shop that flushes and filters the coolant in your engine using equipment that is not only
effective, but environmentally safe.

Over time leaks can develop in the cooling system. If these leaks are not corrected you will lose
excessive coolant which can cause overheating and engine damage. Although many leaks can be fixed
as easily as tightening a hose clamp, in many cases you may still need to replace hoses, clamps, the water
pump, various gaskets, or even radiator or heater core repair or replacement.
Some chemical additives call "stop leaks" or "sealers"  have been developed to stop some minor
leaks from inside the cooling system.
Most chemical sealers are derived from solutions which contain thousands of small particles that upon
coming in contact with the leak will collect in sufficient quantity to where they clot up and stop the leak.

These chemical sealers should only be used as a short term fix in certain circumstances, but can be
quite effective. Just remember to only use them in moderation.
Excessive use can cause other problems and they do not seal all leaks.

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