Coolant overflow tank

Types of Coolant Overflow Tank

A coolant overflow tank is a container that stores excess coolant fluid that the radiator has expelled. The tank can be constructed from metal, glass, or plastic, with the latter being the most common material used in modern vehicles. The coolant overflow tank has two ports, one to the radiator and the other to the engine.

• Pressurized tank: This type of coolant overflow tank has a cap that is pressurized. The tank is directly linked to the radiator and has a valve and hose that allow for the excess coolant to flow into the tank when the vehicle is heated. When the vehicle cools down, the pressure in the tank is released, and the water is sucked back into the radiator. This cycle helps maintain the coolant at the same level. These tanks are used in high-performance vehicles due to their effectiveness.
• Non-pressurized tank: This type of coolant overflow tank is not pressurized, meaning it has a regular cap like any other container. The tank is connected to the overflow pipe on the radiator. A hose from the tank leads to the engine coolant. When the coolant heats up and expands, it flows into the tank through the overflow pipe. When the coolant cools, it contracts and creates a vacuum that prevents the coolant from going back into the radiator. This system is simpler and more affordable than the pressurized tank system, although it is not as efficient.
• Remote reservoir: This type of coolant overflow tank is not connected to the radiator but rather to the vehicle's cooling system. This tank is located some distance away from the cooling system. Remote reservoirs are often used in vehicles where the radiator is not easily accessible or where there is a need for additional coolant capacity.

Specification and Maintenance of Coolant Overflow Tank

The specifications of the coolant tank vary depending on the vehicle make, model, and year. However, some general specifications are as below:

• Material

  The coolant overflow tanks are made from different materials. The material affects the durability, weight, and cost of the tank. The most common materials are aluminum and plastic. Plastic tanks are affordable and lightweight. They are also resistant to corrosion. Aluminum tanks are more durable and can withstand high temperatures and pressures.

• Capacity

  The coolant overflow tank has different capacities to suit various vehicle models. The capacity is measured in liters or gallons. The tank capacity needs to be compatible with the vehicle cooling system. If the tank capacity is too small, it will not hold the expanded coolant. On the other hand, if the tank capacity is too large, it will not fit the vehicle space and may affect the pressure of the cooling system.

• Pressure Rating

  The coolant overflow tank has different pressure ratings. The tank is designed to withstand the pressure generated by the vehicle cooling system. The pressure is measured in PSI. The overflow tank with a higher pressure rating can handle the high pressure and temperature in a vehicle with a high-performance engine. The tank with a low-pressure rating is suitable for vehicles with a standard engine.

• Mounting

  The coolant overflow tank is mounted on the vehicle with screws, bolts, or clamps. The location of the tank is fixed, and the mounting method should be easy. The tank is mounted near the radiator with a secure base.

• Connection

  The coolant overflow tank has inlets and outlets that are connected to pipes. The pipes carry the coolant to and from the tank. The inlet and outlet ports should be compatible with the pipe diameter to prevent leaks and ensure a smooth coolant flow.

Coolant overflow tank maintenance is important to ensure it lasts long and functions properly. Here are some maintenance tips:

• 1. The coolant level in the overflow tank should be checked regularly. The level should be between the minimum and maximum marks. If the level is low, add more coolant. In case of high, ensure the excess is removed.
• 2. The tank should be inspected for damages, cracks, leaks, and corrosion. Any visible damage should be repaired immediately. In case of corrosion, the tank should be replaced.
• 3. The hoses and clamps connected to the tank should be checked for wear and tear. Replace any damaged hoses and ensure the clamps are securely fastened.
• 4. The tank should be cleaned regularly to remove any debris or dirt. A clean tank prevents clogging of the pipes.
• 5. The coolant should be changed according to the manufacturer's recommendations. The new coolant should be mixed with the recommended water ratio.
• 6. During maintenance, ensure the overflow tank is not opened when the engine is hot. This is because the coolant inside the tank is under pressure and can cause burns.

How to Choose a Coolant Overflow Tank

There are several factors to consider when choosing a coolant overflow bottle for retail business. They include:

• Vehicle Compatibility

  Consider the type of vehicles the tanks are compatible with. For example, some coolant tanks are designed for specific car makes and models. Stock generic overflow tanks that are compatible with many vehicles. Also, include aftermarket and performance tanks to cater to clients looking for upgrades.

• Material and Durability

  Coolant tanks are constructed using different materials. Each material offers a different level of durability and heat resistance. For instance, some tanks are made of steel, while others are plastic. Plastic tanks are less durable than steel tanks. However, plastic tanks are designed to withstand the corrosive effects of coolant. Stock tanks made of various materials to meet the demands of different customers.

• Capacity

  Overflow tanks have different capacities. The right tank for a vehicle depends on the size of the radiator. For a small car, a tank with a capacity of between 1.5 to 2 quarts is sufficient. Larger vehicles and trucks require tanks with a higher capacity. When choosing coolant overflow tanks for resale, consider the needs of the target market. It would be best to stock a variety of sizes to cater to different clients.

• Ease of Installation

  Some overflow tanks are easy to install. They come with mounting hardware and are designed with features that minimize hose connections. They are ideal for DIY installations. Consider the level of difficulty when installing the tank. Tanks that require professional installation are likely to increase overhead costs and reduce profit margins.

• Brand Reputation and Reviews

  Consider the manufacturer's brand reputation. Tanks made by well-known brands are likely to be high quality. They also come with quality warranty offers. Read customer reviews to get an idea of the product quality and performance.

• Price and Budget

  Set a price budget and look for coolant overflow tanks that match the budget. Weigh the value against the cost to ensure the business makes a reasonable profit margin. Avoid extremely cheap tanks since they may be of low quality.

How to DIY and replace of a coolant overflow tank

Replacing a coolant overflow tank is a manageable DIY task. Here's a step-by-step guide:

Gather the necessary tools: Users will need a new coolant overflow tank compatible with their vehicle, basic hand tools such as screwdrivers and pliers, and a socket wrench set. They should also have access to coolant.

Prepare the vehicle: Park the vehicle on a level surface and engage the parking brake. Open the hood and allow the engine to cool.

Locate the coolant overflow tank: The coolant overflow tank is typically a translucent plastic tank near the radiator. It has hoses connected to it.

Disconnect the hoses: Use pliers or a hose clamp tool to loosen the clamps and slide them away from the tank. Carefully remove the hoses from the tank. Be cautious as some coolant may drip out.

Remove mounting hardware: Depending on the vehicle, the overflow tank may be held in place with bolts or clips. Use the appropriate tools to remove the mounting hardware and lift the tank out.

Install the new tank: Place the new coolant overflow tank in the mounting location and secure it with the bolts or clips. Ensure a snug fit to prevent leaks.

Reconnect the hoses: Carefully attach the hoses to the new tank, ensuring they are positioned in the same orientation as the old one. Tighten the clamps to secure the connections.

Refill the coolant: If any coolant was lost during the process, use the appropriate coolant to refill the system. Refer to the vehicle's manual for the correct coolant type and mixture.

Start the engine and check for leaks: Start the engine and allow it to run for a few minutes. Check the hoses and connections for any signs of leaks. Address any issues before closing the hood.

Q and A

Q1: What is the work of a coolant overflow tank?

A1: The overflow tank collects excess coolant that expands from the radiator when hot. It then allows the coolant to return to the radiator when it is cool.

Q2: Where is the coolant overflow tank located?

A2: The tank is located on the driver's side of the engine bay, close to the radiator.

Q3: What is the difference between a coolant reservoir and an overflow tank?

A3: The coolant reservoir is the same as the overflow tank. It stores excess coolant. There is no difference between the two.