When to replace coolant on a Subaru?
Maintaining the coolant system in your Subaru is crucial for ensuring the longevity and proper functioning of your vehicle's engine. The recommended interval for replacing the coolant, also known as antifreeze, can vary depending on the specific model and year of your Subaru. In general, it's a good idea to follow the manufacturer's guidelines and replace the coolant at the recommended intervals to keep your Subaru running smoothly.
Subaru Coolant Replacement Intervals
According to Subaru's maintenance schedule, the coolant in most Subaru models should be replaced every 30,000 miles or 30 months, whichever comes first. However, it's important to note that some Subaru models may have different recommended intervals, so it's always best to refer to your owner's manual or consult with a Subaru dealer or certified mechanic.
Factors that can affect the recommended coolant replacement interval include the age and mileage of your Subaru, the driving conditions, and the quality of the coolant used. In general, it's a good idea to replace the coolant more frequently if your Subaru is used for towing, hauling heavy loads, or driving in extreme temperatures or conditions.
Signs It's Time to Replace Subaru Coolant
In addition to following the manufacturer's recommended intervals, there are several signs that it may be time to replace the coolant in your Subaru:
- The coolant appears discolored, cloudy, or contaminated.
- The coolant level is consistently low, indicating a leak or other issue.
- The engine is running hotter than normal or the temperature gauge is reading higher than usual.
- You notice a sweet, syrupy odor coming from the engine, which could indicate a coolant leak.
If you notice any of these signs, it's a good idea to have your Subaru's coolant system inspected and the coolant replaced if necessary. Ignoring these warning signs can lead to more serious issues, such as engine overheating or even engine damage.
Coolant Replacement Procedure
Replacing the coolant in a Subaru typically involves the following steps:
- Locate the radiator drain plug and drain the old coolant.
- Flush the cooling system to remove any debris or contaminants.
- Refill the system with the recommended type and amount of coolant, as specified in your owner's manual.
- Bleed the cooling system to remove any air pockets.
- Check the coolant level and top it off if necessary.
It's important to use the correct type of coolant for your Subaru, as using the wrong type can lead to compatibility issues and potential damage to the cooling system. Consult your owner's manual or a Subaru dealer for the recommended coolant type and specifications.
By following the manufacturer's recommended coolant replacement intervals and being vigilant for any signs of coolant issues, you can help ensure the longevity and proper functioning of your Subaru's engine and cooling system.
Do Subaru's need special coolant?
Yes, Subarus need a specific coolant, primarily the factory-filled "Super Coolant," which is a special blue Subaru coolant. Before 2008, Subarus used a long-life green coolant. While a high-quality universal Asian blue coolant can be used, it's crucial to use the correct type for your specific Subaru model and year to ensure proper corrosion protection, especially for its aluminum engine components.
Coolant types and considerations
- Blue Subaru Super Coolant: This is the current standard, introduced after 2008, and is a premixed, long-life formula designed specifically for Subaru's aluminum engines. It has a much longer service interval than older coolants.
- Green Subaru Long Life Coolant: This was used in Subarus before 2008. It is an ethylene glycol-based coolant that is not premixed and requires mixing with water to the correct ratio, which can be more challenging to get right.
- Universal Asian Blue Coolant: A high-quality universal Asian blue coolant can be used as a substitute for Subaru's blue Super Coolant. This coolant is also designed to protect aluminum engines and can be a good option if you can't get the Subaru-brand product.
Important tips
- Always check your owner's manual: The most accurate information for your specific Subaru model will be in your owner's manual.
- Don't mix coolants: Never mix green and blue coolant, as they are not formulated to be compatible with each other.
- Consider the warranty: If your car is still under warranty, using the specified Subaru coolant is recommended to avoid voiding the warranty.
- Don't use universal coolants indiscriminately: While some universal coolants may work, it's crucial to ensure the universal coolant is specifically formulated for Asian vehicles to protect against corrosion and other damage.
How often should you change your coolant on a Subaru?
every two to five years
How often should I change my coolant? The frequency of coolant changes varies widely, but typically falls between 30,000 and 100,000 miles or every two to five years.
Do subarus lose coolant?
Subaru coolant leaks can be caused by several factors, including: Damaged or worn out hoses: The hoses that carry the coolant through the engine can become worn out or damaged over time, leading to coolant leaks.
At what mileage should I replace coolant?
30,000 miles
Flushing the coolant and replacing it with fresh fluid every two years or 30,000 miles is a good rule of thumb, but guidelines can vary from model to model. While you perform this service, inspect the hoses and radiator cap for wear.
