2017 Subaru Forester Coolant Type – The Essential Guide For DIY
The correct coolant is crucial for your 2017 Subaru Forester’s engine health and longevity. Using the specified Subaru Super Coolant, a blue, long-life ethylene glycol formula, ensures optimal heat transfer, corrosion protection, and prevents costly damage from overheating or freezing. This guide provides everything DIY enthusiasts need to know about maintaining their Forester’s cooling system.
Every Subaru owner knows the importance of a well-maintained vehicle, especially when tackling daily commutes or venturing off the beaten path. A critical, yet often overlooked, component of your Forester’s health is its cooling system. Understanding the proper 2017 Subaru Forester coolant type is not just about preventing overheating; it’s about protecting your engine from corrosion and ensuring its longevity.
This comprehensive guide from EngineNeeds will walk you through everything you need to know about your 2017 Forester’s coolant. We’ll cover why the right fluid matters, how to check and top off your coolant, and even guide you through a proper flush, empowering you to keep your Subaru running cool and strong for years to come. Get ready to dive deep into your Forester’s cooling system with confidence and expertise.
Why the Right Coolant is Critical for Your 2017 Subaru Forester
Your Subaru Forester’s engine generates immense heat during operation. The cooling system is designed to dissipate this heat, maintaining an optimal operating temperature. Coolant, also known as antifreeze, is the lifeblood of this system.
It circulates through the engine block, cylinder head, radiator, and heater core, absorbing heat and releasing it into the atmosphere. Using the correct 2017 Subaru Forester coolant type is paramount for this process.
Beyond Just Temperature Regulation: The Coolant’s Multifaceted Role
The job of your coolant goes far beyond just keeping the engine from overheating. It’s a complex chemical formula designed to perform several vital functions.
First, it prevents freezing in cold climates, which could cause catastrophic damage to your engine block and radiator. Second, it provides crucial corrosion protection to the various metal components within the cooling system, including aluminum, cast iron, and copper. Without this protection, rust and scale can build up, impeding heat transfer and eventually leading to leaks or blockages.
Finally, the right coolant also lubricates the water pump, extending its lifespan. Using an incompatible coolant can lead to premature wear of cooling system components, reduced heat transfer efficiency, and even head gasket failure, a common concern for Subaru owners.
Identifying the Correct 2017 Subaru Forester Coolant Type
For your 2017 Subaru Forester, the manufacturer specifies a very particular coolant. This is not a situation where “any” antifreeze will do.
Subaru vehicles, including the 2017 Forester, require a specific formula known as . It’s easily identifiable by its distinctive blue color.
Subaru Super Coolant: What You Need to Know
Subaru Super Coolant is an ethylene glycol-based, long-life, hybrid organic acid technology (HOAT) formula. This specialized coolant is designed to provide extended protection, typically for 11 years or 137,500 miles, whichever comes first, for the initial fill. Subsequent changes are recommended every 6 years or 75,000 miles.
It’s crucial not to mix Subaru Super Coolant with other coolant types, such as green (IAT) or orange/red (OAT) coolants. Mixing can lead to chemical reactions that form gels, reduce corrosion protection, and cause severe damage to your cooling system components. Always refer to your owner’s manual for the definitive specification.
When purchasing coolant, look for genuine Subaru Super Coolant or an aftermarket equivalent specifically stated to be compatible with Subaru vehicles requiring blue, long-life HOAT coolant. Brands like Pentosin Pentofrost A4 or Zerex Asian Vehicle Antifreeze/Coolant are often compatible, but always double-check the label for Subaru compatibility and the HOAT/blue color specification.
Checking and Topping Off Your Forester’s Coolant Level
Regularly checking your coolant level is a simple yet vital maintenance task. It’s a quick inspection that can prevent major problems down the road.
This check should be part of your routine under-hood inspection, perhaps every oil change or before a long road trip.
Step-by-Step Coolant Level Check
Here’s how to safely check your coolant:
- Ensure the Engine is Cold: Never open the radiator cap or coolant reservoir cap when the engine is hot. Hot coolant is under pressure and can spray out, causing severe burns. Wait until the engine has completely cooled, typically several hours after driving.
- Locate the Coolant Reservoir: In your 2017 Subaru Forester, the transparent plastic coolant reservoir is usually located near the radiator, often on the passenger side. It will have “Full” and “Low” or “Max” and “Min” markings.
- Inspect the Level: Visually check the coolant level against the markings. It should be between the “Full” and “Low” lines.
- Top Off if Needed: If the level is below “Low,” carefully remove the reservoir cap. Add only Subaru Super Coolant (blue) or a compatible equivalent, mixed 50/50 with distilled water. Never use tap water, as minerals can cause deposits and corrosion.
- Replace Cap Securely: Ensure the reservoir cap is tightened properly to prevent leaks and maintain system integrity.
If you find yourself frequently topping off your coolant, it could indicate a leak in the system. A small leak might be a loose hose clamp or a pinhole in a hose, but it could also be a more serious issue like a radiator leak or even a head gasket problem. If you suspect a leak, it’s wise to have a professional inspect your vehicle.
Performing a Coolant Flush and Replacement
While topping off is important, a full coolant flush and replacement is a crucial part of your Forester’s long-term maintenance schedule. This process removes old, degraded coolant and replaces it with fresh fluid, restoring optimal protection.
For your 2017 Subaru Forester coolant type, the first flush is typically due around 11 years or 137,500 miles, then every 6 years or 75,000 miles thereafter. Always consult your owner’s manual for precise intervals.
Tools and Materials You’ll Need
Before you begin, gather your supplies:
- Genuine Subaru Super Coolant (or compatible blue HOAT coolant)
- Distilled water (several gallons)
- Large drain pan (at least 2-gallon capacity)
- Funnel (a spill-free funnel is highly recommended for Subarus)
- Basic socket/wrench set (for drain plug, if applicable)
- Pliers (for hose clamps)
- Safety glasses and chemical-resistant gloves
- Shop rags
- Torque wrench (for drain plug and radiator cap)
- New radiator cap (optional, but recommended if yours is old)
Detailed Coolant Flush Procedure
This process involves working with hot fluids and under-pressure systems. Proceed with caution. If you’re unsure, consult a professional mechanic.
- Safety First: Ensure the engine is completely cold. Put on your safety glasses and gloves. Position your vehicle on a level surface and consider using jack stands if you need to access under the car.
- Locate Drain Points: Place the drain pan under the radiator drain petcock (a plastic valve at the bottom of the radiator) or the lower radiator hose. Some Subarus may also have a drain plug on the engine block.
- Drain the Old Coolant: Carefully open the radiator drain petcock. If your Subaru doesn’t have one, use pliers to loosen the clamp on the lower radiator hose and carefully pull the hose off, directing the flow into your drain pan. Remove the radiator cap to allow the coolant to drain faster.
- Flush with Distilled Water (Optional but Recommended): Once the system is empty, close the drain petcock or reattach the lower radiator hose. Fill the system with distilled water. Run the engine with the heater on high until it reaches operating temperature (thermostat opens). Let it cool completely, then drain the distilled water. Repeat this process until the drained water is clear, indicating most of the old coolant is gone.
- Refill with New Coolant: Close the drain petcock or reattach the lower radiator hose securely. Using a spill-free funnel, slowly add the 50/50 mix of new Subaru Super Coolant and distilled water. Fill until the funnel is about halfway full.
- Bleed the System: Start the engine with the heater on full blast and the funnel attached. As the engine warms up, air bubbles will rise into the funnel. Gently squeeze the upper and lower radiator hoses to help dislodge air pockets. Continue this until the thermostat opens and the coolant level stabilizes. You’ll see the level drop significantly as the thermostat opens and fills the engine block.
- Top Off and Test: Once no more bubbles appear and the level is stable, remove the funnel and cap the radiator. Fill the coolant reservoir to the “Full” line. Drive the vehicle for a day or two, then recheck the reservoir level when the engine is cold and top off if necessary.
- Proper Disposal: Old coolant is toxic. Never pour it down the drain. Collect all used coolant in a sealed container and take it to an automotive parts store, recycling center, or hazardous waste facility for proper disposal.
This comprehensive flush ensures your 2017 Subaru Forester coolant type is fresh and ready to protect your engine.
Common Coolant-Related Issues and Troubleshooting
Even with proper maintenance, issues can arise in any vehicle’s cooling system. Knowing what to look for can help you address problems quickly and prevent costly damage.
Subaru vehicles, like any other, can experience specific cooling system challenges.
Signs of Trouble and What They Mean
- Overheating Engine: The most obvious sign of a cooling system problem. If your temperature gauge goes into the red, pull over immediately and shut off the engine. This could be due to low coolant, a faulty thermostat, a failing water pump, a clogged radiator, or even a blown head gasket.
- Coolant Leaks: Puddles of blue liquid under your car are a clear sign. Check hoses for cracks or loose clamps, the radiator for damage, and the water pump for drips. A sweet smell can also indicate a leak, even if you don’t see a puddle.
- Low Coolant Level: If your reservoir is consistently low, you have a leak somewhere, or your engine is consuming coolant.
- White Smoke from Exhaust: This often indicates coolant is burning in the combustion chambers, a classic sign of a failing head gasket.
- Rust or Debris in Coolant: If your coolant looks murky, rusty, or has particles floating in it, it’s a sign of corrosion and degradation, meaning it’s well past its service life and urgently needs replacement.
If you encounter any of these issues, especially persistent overheating or significant leaks, it’s always best to consult a certified Subaru mechanic. While DIY is empowering, some issues require specialized diagnostic tools and expertise to properly resolve, particularly with sensitive components like head gaskets.
Safety Precautions When Working with Coolant
Coolant is a vital fluid for your vehicle, but it’s also a hazardous chemical. Taking proper safety precautions is non-negotiable when performing any maintenance on your cooling system.
Always prioritize your well-being and the environment.
Protect Yourself and the Environment
- Wear Personal Protective Equipment (PPE): Always wear safety glasses or goggles to protect your eyes from splashes. Chemical-resistant gloves will protect your skin from irritation and absorption.
- Work in a Well-Ventilated Area: Ethylene glycol fumes can be harmful if inhaled. Ensure good airflow in your workspace.
- Never Open a Hot Radiator Cap: As mentioned, hot coolant is under pressure and can cause severe burns. Wait until the engine is completely cold before opening any part of the cooling system.
- Keep Coolant Away from Children and Pets: Coolant, especially ethylene glycol, has a sweet taste that can attract animals and children, but it is highly toxic. Ingesting even a small amount can be fatal. Clean up any spills immediately.
- Proper Disposal is Crucial: Never pour used coolant down the drain or onto the ground. It is an environmental pollutant. Collect all used coolant in a sealed container and take it to a local hazardous waste facility or an auto parts store that offers recycling.
By following these safety guidelines, you can confidently perform maintenance on your 2017 Subaru Forester’s cooling system while protecting yourself and the planet.
Frequently Asked Questions About 2017 Subaru Forester Coolant
Here are some common questions car owners and DIYers ask about their Forester’s coolant.
Can I use any green antifreeze in my 2017 Subaru Forester?
No, absolutely not. Your 2017 Subaru Forester requires a specific blue, long-life HOAT (Hybrid Organic Acid Technology) coolant, known as Subaru Super Coolant. Green coolants are typically IAT (Inorganic Acid Technology) and are incompatible. Mixing different coolant types can cause chemical reactions that form sludge, reduce corrosion protection, and severely damage your cooling system.
How often should I check my coolant level?
It’s a good practice to check your coolant level in the reservoir at least once a month, or every time you get an oil change. Also, check it before any long road trips or if you notice your temperature gauge running higher than usual. Always check when the engine is cold.
What if I accidentally put the wrong coolant in my Forester?
If you’ve accidentally added the wrong coolant, do not drive the vehicle. The best course of action is to have the system professionally flushed multiple times to remove all traces of the incorrect fluid and then refilled with the proper Subaru Super Coolant. Driving with mixed coolants can lead to significant engine and cooling system damage.
Is “distilled water” really necessary for mixing coolant?
Yes, distilled water is highly recommended. Tap water contains minerals and impurities that can lead to scale buildup, corrosion, and reduced cooling system efficiency over time. Distilled water is free of these contaminants, ensuring your coolant mixture performs optimally and prolongs the life of your cooling system components.
What does it mean if my coolant looks rusty or murky?
Rusty or murky coolant indicates that the coolant has degraded and is no longer providing adequate corrosion protection. It’s a sign that the cooling system components are starting to rust and break down. This situation warrants an immediate coolant flush and replacement to prevent further damage and restore proper system function.
Keep Your Subaru Running Cool and Strong
Understanding and properly maintaining the 2017 Subaru Forester coolant type is a cornerstone of responsible vehicle ownership. By using the correct Subaru Super Coolant, performing regular checks, and following the recommended flush intervals, you’re not just preventing breakdowns; you’re actively preserving the heart of your Forester. This vigilance protects your engine from the extremes of heat and cold, ensuring efficient operation and extending its lifespan.
Whether you’re tackling rough trails, commuting to work, or embarking on a cross-country adventure, a healthy cooling system means peace of mind. Remember the critical safety precautions when working with coolant and don’t hesitate to seek professional help if you encounter a complex issue. With these expert tips, you’re well-equipped to keep your Subaru running cool, reliable, and ready for whatever the road—or off-road—throws your way. Stay safe and stay comfortable on all your journeys!
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