Subaru Forester 2.0 Diesel Turbo: Problems, Upgrades & More
Hey Subaru enthusiasts! Let's dive deep into the world of the Subaru Forester 2.0 diesel turbo. Whether you're a seasoned owner or considering joining the Forester family, understanding the ins and outs of this engine is super important. We'll cover common issues, potential upgrades, and everything in between. So, buckle up and let's get started!
Common Issues with the Subaru Forester 2.0 Diesel Turbo
Okay, let's get real. No engine is perfect, and the Subaru Forester 2.0 diesel turbo has its share of quirks. Knowing these issues can save you a ton of headaches down the road. So, what are the common problems you might encounter?
First up, turbo failure. This is a big one. The turbocharger is a complex piece of equipment, and it works hard to boost your engine's performance. Over time, things can wear out. Keep an eye out for symptoms like reduced power, whining noises, or even smoke coming from the exhaust. Regular maintenance, like oil changes and checking the turbo's health, can help prevent this. Also, ensure you're using high-quality oil that meets Subaru's specifications. Cheap oil can lead to premature turbo wear. Another frequent issue is the diesel particulate filter (DPF). The DPF captures soot to reduce emissions, but it can get clogged over time, especially if you do a lot of short trips. When the DPF gets clogged, you might notice a warning light on your dashboard, reduced engine performance, or even the engine going into limp mode. To combat this, make sure you take your Forester for longer drives regularly to allow the DPF to regenerate. There are also aftermarket DPF cleaning services and additives that can help keep it in good shape. Don't ignore DPF issues, as they can lead to more serious problems down the line.
Another area to watch is the EGR valve. The EGR valve recirculates exhaust gases back into the engine to reduce emissions, but it can also get gunked up with carbon deposits. This can cause rough idling, poor performance, and even stalling. Regular cleaning or replacement of the EGR valve can keep your engine running smoothly. You can try using EGR valve cleaners available in the market, but sometimes a manual cleaning or replacement is necessary. Furthermore, fuel injector problems can arise. The diesel engine relies on precise fuel delivery, and if the injectors get clogged or start to fail, you'll notice issues like poor fuel economy, rough running, and difficulty starting. Using high-quality fuel and fuel additives can help keep your injectors clean. If problems persist, professional cleaning or replacement of the injectors might be needed. Keep an eye on your fuel consumption; a sudden drop could be a sign of injector issues. Finally, be aware of potential issues with the dual-mass flywheel (DMF). The DMF is designed to dampen vibrations from the engine, but it can wear out over time, leading to excessive noise and vibration. If you hear rattling or knocking noises, especially when idling or changing gears, it might be a sign that your DMF is on its way out. Replacement is usually the only solution for a worn DMF.
Upgrading Your Subaru Forester 2.0 Diesel Turbo
Now for the fun stuff! If you're looking to boost your Forester's performance, there are plenty of upgrades available. Let's explore some popular options.
Firstly, ECU remapping is a common upgrade to unleash hidden power. A remap adjusts the engine's software to optimize fuel delivery, boost pressure, and timing. This can result in significant gains in horsepower and torque, as well as improved fuel economy. However, it's crucial to choose a reputable tuner who knows their stuff. A poorly executed remap can damage your engine. Talk to other Forester owners and do your research before selecting a tuner. Be sure to tell your tuner about any other modifications you've made to your car so they can tailor the remap to your specific setup. Secondly, a performance exhaust system can improve exhaust flow and reduce backpressure, leading to better engine performance and a sportier sound. A cat-back exhaust system is a popular choice, as it replaces the exhaust system from the catalytic converter back. Look for systems made from high-quality stainless steel for durability. Consider the noise level of the exhaust system, as some performance exhausts can be quite loud. Thirdly, an upgraded intercooler can improve cooling efficiency, which is especially beneficial if you've remapped your ECU. A larger intercooler will keep intake temperatures down, reducing the risk of detonation and improving overall performance. Look for intercoolers with a larger core volume and efficient fin design. Proper installation is crucial to ensure optimal performance.
Consider upgrading your turbocharger. While it's a more involved upgrade, fitting a larger or more efficient turbocharger can significantly boost power output. This is often done in conjunction with other modifications, such as ECU remapping and exhaust upgrades. Ensure the turbocharger is compatible with your engine and that you have the necessary supporting modifications. A larger turbocharger will require more fuel and potentially upgraded injectors. Fourthly, upgrading the suspension can improve handling and stability. Options include lowering springs, performance shocks, and sway bars. Lowering springs will lower the car's center of gravity, reducing body roll in corners. Performance shocks will improve damping and control. Sway bars will reduce body flex and improve handling balance. Choose suspension components that match your driving style and intended use. Finally, consider upgrading your brakes. If you're increasing engine power, it's essential to ensure your brakes are up to the task. Upgraded brake pads, rotors, and calipers will improve stopping power and reduce brake fade. Look for brake components from reputable manufacturers. Ensure the brake components are compatible with your car and that they are properly installed. A brake upgrade is a worthwhile investment in safety and performance.
Maintaining Your Subaru Forester 2.0 Diesel Turbo
Alright, let's talk maintenance. Keeping your Forester 2.0 diesel turbo in tip-top shape requires regular attention. Here’s what you need to focus on:
Firstly, regular oil changes are essential. Use the correct oil type and change it according to the manufacturer's recommendations. Diesel engines tend to produce more soot, so frequent oil changes are even more critical. Always use a high-quality oil filter to ensure proper filtration. Check your oil level regularly and top up as needed. Keep a record of your oil changes to stay on schedule. Secondly, air filter maintenance is important. A clean air filter ensures proper airflow to the engine. Check the air filter regularly and replace it as needed. A dirty air filter can reduce engine performance and fuel economy. Consider using a high-flow air filter for improved performance. Clean the air filter housing when replacing the filter. Thirdly, fuel filter replacement is important for optimal performance. The fuel filter prevents contaminants from entering the fuel system. Replace the fuel filter according to the manufacturer's recommendations. A clogged fuel filter can cause poor engine performance and damage to the fuel injectors. Use a high-quality fuel filter for best results. Be careful when replacing the fuel filter to avoid fuel spills.
Pay attention to cooling system maintenance. The cooling system keeps the engine from overheating. Check the coolant level regularly and top up as needed. Flush the cooling system according to the manufacturer's recommendations. Inspect the radiator hoses for leaks or damage. Replace the thermostat if needed. Overheating can cause severe engine damage, so keep the cooling system in good shape. Also, inspect and maintain the DPF. As we discussed earlier, the DPF can get clogged over time. Take your Forester for longer drives regularly to allow the DPF to regenerate. Consider using DPF cleaning additives. If problems persist, seek professional cleaning or replacement. Ignoring DPF issues can lead to more serious problems. Finally, keep an eye on the turbocharger. Check the turbocharger for leaks or damage. Listen for unusual noises, such as whining or whistling. Ensure the oil supply to the turbocharger is clean and unrestricted. If you notice any problems, address them promptly to prevent further damage. Regular maintenance is key to keeping your turbocharger running smoothly.
Troubleshooting Common Problems
So, what do you do when things go wrong? Here’s a quick guide to troubleshooting some common issues with your Subaru Forester 2.0 diesel turbo:
Problem: Reduced power
Possible Causes: Turbo failure, clogged DPF, faulty fuel injectors, air leaks.
Troubleshooting Steps: Check for error codes using an OBD-II scanner. Inspect the turbocharger for damage or leaks. Check the DPF status and consider a regeneration cycle. Inspect the fuel injectors for leaks or clogs. Check for air leaks in the intake system.
Problem: Rough idling
Possible Causes: Faulty EGR valve, vacuum leaks, dirty MAF sensor, fuel injector issues.
Troubleshooting Steps: Clean or replace the EGR valve. Check for vacuum leaks. Clean the MAF sensor. Inspect the fuel injectors.
Problem: Difficulty starting
Possible Causes: Glow plug issues, low fuel pressure, faulty fuel injectors, weak battery.
Troubleshooting Steps: Check the glow plugs. Check the fuel pressure. Inspect the fuel injectors. Check the battery voltage and condition.
Problem: Excessive smoke
Possible Causes: Turbo failure, faulty fuel injectors, worn piston rings, clogged DPF.
Troubleshooting Steps: Inspect the turbocharger. Inspect the fuel injectors. Check the engine compression. Check the DPF status.
Conclusion
So, there you have it – a comprehensive look at the Subaru Forester 2.0 diesel turbo. While there are potential issues to be aware of, with proper maintenance and timely upgrades, you can keep your Forester running strong for years to come. Remember, regular maintenance is key to preventing major problems. Happy driving, and may your turbo always spool smoothly! Take care, Subaru family, and keep on exploring!
