Small engine oil cooler

Types of Small Engine Oil Cooler

A small engine oil cooler is a device that helps maintain optimal oil temperatures in small engines by removing excess heat from the engine oil. There are different types of oil coolers, including:

• Air-cooled oil coolers: Air-cooled oil coolers are the most common type of oil cooler. The oil is cooled by air. When the oil is heated, the cooler's external fins allow for heat exchange with the air. The oil is cooled when the heat is transferred to the air flowing through the fins. Air-cooled oil coolers are affordable and straightforward. They are, therefore, widely used in various applications, including motorcycles and small engines.
• Water-cooled oil coolers: Water-cooled oil coolers use water as the coolant to absorb the oil's heat. In this type of cooler, the water and oil are in separate channels, preventing them from mixing. When the oil is heated, the water absorbs the heat and transfers it to the water, which is then discharged by the engine. Water-cooled oil coolers are mainly used in applications where precise temperature control is required, such as in high-performance engines.
• Heat exchanger oil coolers: Heat exchanger oil coolers use a third fluid to transfer heat between oil and another fluid. The coolers have three separate channels for oil, cooler fluid, and heating fluid. The oil's heat is transferred to the cooling fluid, which then transfers the heat to the heating fluid. Heat exchanger oil coolers are often used in industrial applications.
• Sandwich plate oil cooler: This is a small engine oil cooler kit that is mounted between the engine oil filter and the oil filter adapter. The sandwich plate has two oil passages that divert a small amount of oil to the cooler and back to the engine. The plate is also fitted with a small cooler, which is used to cool the oil that passes through the cooler and into the oil passages.
• Thermostatic oil cooler: A thermostatic oil cooler is fitted with a thermostat that controls the oil flow to the cooler. When the oil reaches the set temperature, the thermostat closes the valve and stops the oil from flowing into the cooler. This helps maintain optimal oil temperature in the engine during cold weather.

Specifications and maintenance of small engine oil cooler

• Cooling capacity

  Cooling capacity refers to the total heat removed by the cooler. It is measured in kilowatts or BTUs. The oil cooler has a maximum cooling capacity of 1-3 kW.

• Pressure drop

  Pressure drop refers to the oil's pressure drop while passing through the oil cooler. It is measured in bars or pounds per square inch. The cooler has a maximum pressure drop of 0.5 bars or 7.5 PSI.

• Temperature difference

  Temperature difference refers to the temperature difference between the cooled oil and the oil entering the cooler. This measurement is in degrees Celsius or Fahrenheit. The small engine oil cooler has a maximum temperature difference of 20 °C or 36 °F.

• Thermal conductivity

  Thermal conductivity is the cooler's ability to conduct heat. A higher rating indicates the cooler can conduct heat better. It is measured in watts per meter-kelvin (W/m·K). The oil cooler has thermal conductivity ranging from 200-400 W/m·K.

• Corrosion resistance

  Oil coolers are made with corrosion-resistant materials. These include aluminum, stainless steel, and copper. Each material offers different levels of corrosion resistance.

• Size and weight

  The size and weight of an oil cooler depend on its design and cooling capacity. Generally, the cooler has a compact design and is lightweight. The oil cooler's weight is about 1-3 kg, and its dimensions are 100x150x50 mm.

Small engine oil coolers need regular maintenance for effective operation and longevity. Here are some tips for maintaining small engine oil coolers:

• 1. Inspect the oil cooler: This involves visually checking the oil cooler for damages or leaks. Also, check all connections and fittings for leaks and wear signs.
• 2. Clean the oil cooler: Carry out this procedure monthly or at least once a month. Remove the oil cooler from the engine and clean it with soapy water. Rinse it with clean water and allow it to dry before reinstalling.
• 3. Replace the oil cooler: Small engine oil coolers have a long lifespan. However, they may wear out or become ineffective after many years of use. When this occurs, replace the old oil cooler with a new one.
• 4. Check the oil level: This involves checking the oil level in the engine to ensure it is at the required level. Top up the oil to the required level if it is low.
• 5. Change the oil: This should be done every three to six months or after 3000 miles of driving. Drain the old oil and replace it with a new one. Ensure the oil used meets the manufacturer's specifications.

How to choose a small engine oil cooler

Choosing the right oil cooler for a small engine is very important. It ensures that the engine gets the maximum benefit from the cooler, prolonging its life and improving its performance. There are several factors to consider when choosing a small engine oil cooler.

• Engine size

  The engine size is very important when choosing an oil cooler. The size of the cooler should be proportional to the engine's size and its cooling capacity. For a bigger engine, the oil cooler should be bigger, and for a smaller engine, the cooler should be smaller.

• Type of engine

  The type of engine also plays a major role in deciding which oil cooler to choose. For example, a diesel engine requires a cooler with a better heat exchange rate because it generates a lot of heat compared to a gasoline engine.

• Oil cooler location

  The location where the oil cooler is installed has an impact on the performance of the cooler. It is advisable to place the oil cooler in a location with a good airflow rate. This will ensure that the oil is cooled efficiently. The oil cooler should be mounted close to the engine in a position where air can easily pass through it.

• Quality

  Quality is a very important factor to consider when choosing an oil cooler. This is because a high-quality cooler will provide better service for a long time. The oil cooler should be from a well-known brand.

How to DIY and replace small engine oil cooler

Replacing the oil cooler on a small engine is a straightforward process that can be completed with basic hand tools. Follow the steps below to learn how to replace an oil cooler on a small engine.

Tools and materials needed

• Socket set
• Wrench set
• Screwdrivers
• New oil cooler
• Oil
• Oil filter

Step-by-step guide

• 1. Turn off the power to the engine. Disconnect the spark plug wire from the spark plug to prevent the engine from accidentally starting.
• 2. Drain the engine oil. Use a socket or wrench to remove the oil cooler fittings and drain the oil into a clean container. Be careful not to drop any dirt or debris into the oil while removing the cooler.
• 3. Remove the oil cooler. Use a socket or wrench to remove the bolts or nuts that hold the oil cooler in place. Slide the oil cooler out of the engine.
• 4. Install the new oil cooler. Slide the new oil cooler into place and secure it with bolts or nuts. Tighten the fasteners to the manufacturer's torque specifications.
• 5. Reconnect the oil lines to the oil cooler fittings. Use a wrench or pliers to tighten the fittings and prevent oil leaks.
• 6. Reconnect the spark plug wire to the spark plug. Refill the engine with fresh oil through the oil fill cap.
• 7. Start the engine and let it run for a few minutes. Check for any oil leaks around the oil cooler fittings.

Q&A

Q1: Does a small engine need an oil cooler?

A1: Not every small engine requires an oil cooler. Typically, only high-performance engines or those that work hard need oil coolers. These engines run hotter and need extra cooling to keep the oil at the right temperature. The oil cooler helps the engine last longer by protecting it from heat stress.

Q2: Can an oil cooler be fitted to any engine?

A2: Oil coolers are available for different types of engines, including small engine oil coolers. As such, an oil cooler can be fitted to any engine, provided that it has been properly designed to be compatible. It is important to consult a mechanic before fitting an oil cooler to an engine.

Q3: What are the benefits of a small engine oil cooler?

A3: The main benefit of the small engine oil cooler is that it cools the oil before it goes into the engine. This is important for engine performance and durability. The oil cooler allows the oil to reach the right temperature quickly and stay there. It also protects the engine from overheating, especially when driving in hot weather or heavy traffic. Keeping the oil at the right temperature helps lubricate engine parts better. This reduces wear and tear and can increase engine power and efficiency.