Automotive Products

CHASIS & SCOPE OF AUTOMOTIVE PRODUCTS CAPABILITIES
Applications in the chassis and underbody systems that call for rubber products includes; shock absorber seals, CV boots and liners, vibration mounts and air springs, all of which contribute to the smooth ride all drivers want. Hoses, cups and boots provide the performance necessary for critical braking and steering systems.
BRAKES & MODULES
Brakes are one of the most critical parts on an automobile and rubber parts used in such applications need to be able to withstand the extreme environmental hot’s and colds, as well as the frictional heat produce from everyday braking. Some of the applications Coi Rubber is currently manufacturing are listed below.
(NVH) NOISE & VIBRATION & HARSHNESS CONTROL
Coi Rubber offers varying types of automotive products with rubber to metal vibration isolators which are designed and manufactured specifically for your application. These isolators are used to diminish vibration, impact or shock as well as to reduce noise level during application use. Examples of vibration control devices currently being manufactured are listed below.
PRODUCTS
Brake Booster Diaphragms
Brake Diaphragms
Brake Caliper Components
Brake Drum Components
Brake Booster Components
Brake Master Cylinder Components
ABS System Components
Break Cap Seal
Brake Hose
Dust Cover Seals
CVJ Boot
Pedal Pads
Gear Covers
Caliper Piston Seals
Caliper Piston Boots
Bushings
Engine Mounts
Center Bearing Support
Linear Mass Dampers
Body and Chassis Mounts
Shock Absorber Bellows
Shock Absorber Seals
Vibration Dampening Material rubber exhaust hanger
POWERTRAIN SYSTEM
The need for high performance elastomer’s in engine and powertrain systems is on the rise because of the higher engine temperatures, extended warranty periods and the growing need to reduce engine emissions. Coi Rubber’s family of elastomer’s used in automotive rubber applications addresses these needs, as well as, an array of other functional applications. Viton ® is a registered trademarks of E. I. du Pont de Nemours and Company or affiliates
ENGINE GASKETS & SEALS
Engine gaskets and seals used in engine applications require an elastomer that demonstrates great fuel and high temperature stability and Viton® fluoroelastomer is typical the compound of choice for such applications. Products that Coi Rubber produces that use Viton® include: fuel injection seals, fuel pump seals, manifold gaskets, diaphragms and other applications that require custom molded rubber products.
With the trend of engine and powertrain systems pushing sealing materials to their limits, Coi Rubber has responded by developing new materials that are able to meet these strenuous demands and still be cost efficient, allowing us to offer very competitive pricing.
PRODUCT EXAMPLES
Diesel Engine Seals
Gasoline engine seals
Engine Mount Systems
oil pan gaskets
rocker cover gaskets
front cover gaskets
radiator tank gaskets
o-ring in long life coolant
Power Steering Seals
Many of the power steering applications of today use high-pressure hydraulic systems. Seals for these applications include an input shaft seal and inner and outer rack seals. The input shaft seal also called a pinion seal are for shafts with slow oscillating rotation, and they have operating pressures that are 10 to 20 psi.
The outer rack seal and inner rack seal are reciprocating applications and can see pressures up to 1500 psi. Typical rack seals will have plastic PTFE back-up rings to prevent seal lip blowout.
Power Steering Hoses
Power Steering hoses require elastomer’s that are able to perform well under a number of different conditions. For example, the elastomer will need to have high tolerances for oil, heat and ozone resistance because of the demanding conditions of transmission and engine systems. It must also be able to withstand high temperatures and have the durability for long term life applications
PRODUCT EXAMPLES
Emission Control Hose
Air Duct Hose
Long Life Coolant Hose
Head Gaskets
The cylinder head gasket is commonly considered to be the most important seal in the automotive engine. The Multi-Layer Steel (MLS) gasket is know the automotive industries preferred method of sealing between the cylinder head and engine block. In this system, multiple layers of cold-rolled spring grade stainless steel are coated with a thin layer of elastromeric material. This thin layer of elastomer is essential to the structure by providing a sealing action to the metal surface imperfections, while resisting aggressive gases, oils and coolants.Nitrile (NBR) is an elastomer that is commonly used, however, Fluoroelastomers , more specifically Viton®, is quickly getting attention for its high temperature resistance and its aggressive resistance to fluids such as, fuels, fuel mixtures, coolants, oils and combustion gases.
TRANSMISSION SEALS
The Automatic Transmission is a complex system combining several different applications, posing a challenge for seal designers. Typically their are two main types of transmission designs: rear wheel drive and front wheel drive, both requiring seals to prevent any leakage. Rear drive designs, for example, typically employ an input seal to prevent leakage of transmission fluid at the interface between the torque converter and the transmission case. Front drive designs also use an output seal to prevent leakage past the output shaft.
ENGINE MOUNTS
Engine mounts are rubber to metal bonded components used to isolate vibration, absorb shock and support load. Coi Rubber’s engine mounts are highly durable and heat resistance.

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