Audi VW Coolant Pipe O-Ring - Elring 340.420

Product Information

An engine coolant pipe o-ring seals the connection between an engine coolant pipe and other engine parts, such as cooling hoses. These o-rings are used at junctions where metal or plastic coolant pipes meet the engine block or cylinder head, ensuring a tight seal. Coolant pipe o-rings usually have a circular cross-section, designed to fit snugly in a groove between the pipe and the engine or hose connection. Occasionally, some auto manufacturers may also use a square-cut o-rings in some applications.

Coolant pipe O-rings are generally made from heat and chemical-resistant materials like nitrile rubber (NBR), silicone, or Viton, all of which are capable of withstanding high temperatures, pressure, and chemical exposure. Nitrile rubber (NBR) O-rings are typically black and are widely used due to their affordability and general resistance to oil and coolant. Silicone O-rings, on the other hand, are often red or orange and are preferred for high-temperature applications because of their superior heat resistance. Viton O-rings, which are often green or brown, offer excellent resistance to a wide range of chemicals, making them ideal for use with various coolants and extreme environments where both heat and chemical exposure are factors.

When installing a new O-ring, it is crucial to ensure that the mating surfaces are clean and free of debris. Lightly lubricating the O-ring with coolant or a compatible lubricant can help ensure a smooth installation and prevent it from tearing or pinching, which would compromise its sealing ability. Regular checks for signs of wear, such as cracks or flattening, can help identify when replacement is necessary to maintain the integrity of the cooling system.

• Mysterious water leaks: It’s not uncommon for a coolant pipe o-ring to fail on high mileage older cars. If you have a few drips of coolant on the ground when parking and letting the car cool down, inspect the flanges and seals where the various coolant pipes meet the engine.
• Physical Damage or Flattening: Sometimes a perfectly sealed pipe flange will leak when reassembled if the pipe is moved or disturbed. Usually, this is because the o-ring was sticky and damaged when removed or flattened with years of heat and coolant exposure making it difficult to seal.
• Low coolant warning: If enough coolant is leaking from the engine coolant pipe o-ring, then you will get a low coolant warning on the dash. Be sure to top up with the correct coolant to make sure the cooling system stays in working order before the leak is repaired.

About Elring

Elring was founded in 1879 by Paul Lechler. Elring "the original" is their trademark, because as an OEM (Original Equipment Manufacturer) to so many automobile manufacturers, there is a chance Elring provided the original gasket. Elring is widely known as an OEM replacement provider of quality parts for European model vehicles. They are mainly producers of gaskets, seals, and other high end supporting components. With locations around the globe, Elring is already established as one of the greatest producers of parts for European vehicles including luxury makes such as BMW, Mercedes, Audi, Volvo and many others. Elring - "Das Original".

As an automotive supplier, ElringKlinger has become a trusted partner to its customers – with a firm commitment to shaping the future of mobility. Be it optimized combustion engines, high-performance hybrids, or environmentally-friendly battery and fuel cell technology, ElringKlinger provides innovative solutions for all types of drive systems. ElringKlinger’s lightweighting concepts help to reduce the overall weight of vehicles. As a result, vehicles powered by combustion engines consume less fuel and emit less CO2, while those equipped with alternative propulsion systems benefit from an extended range. In response to increasingly complex combustion engine technology, the Group also continues to make refinements with regard to gaskets in order to meet the highest possible standards. This is complemented by solutions centered around thermal and acoustic shielding technology. Additionally, the Group‘s portfolio includes products made of the high-performance plastic PTFE which are also marketed to industries beyond the automotive sector. These efforts are supported by a dedicated workforce of more than 10,000 employees at 45 ElringKlinger Group locations around the globe.

The Elring aftermarket brand offers an all-embracing package: original equipment quality, functional reliability, and premium, end-to-end service. This includes, for example, sales and technical training, service information, exploded-view drawings for trucks and vans, monthly newsletters focusing on engine sealing solutions, an online sealing compound wizard, professional installation videos, the Elring Academy, the training truck, and much more besides.

Original Elring products are acknowledged among dealers, mechanics, and customers around the globe. These products include cylinder-head and sealing systems, oil seals and valve stem seals, sealing compounds, and threadlockers as well as cylinder-head bolt and complete gasket sets – for full- and partial servicing.