13/03/2020
Subaru engines have a reputation for requiring attention over time, often due to wear and tear or inconsistent maintenance. While the thought of a complete engine replacement can be daunting, both financially and practically, many Subaru owners find themselves exploring a more economical and sustainable alternative: an engine rebuild. This process can breathe new life into your vehicle, potentially saving you a substantial sum compared to purchasing a brand-new engine. But what exactly does a Subaru engine rebuild entail, how much does it cost, and is it truly the right path for your vehicle? Let's delve into the intricacies of restoring your Subaru's heart.
- Understanding Subaru Engine Rebuild Costs
- The Detailed Process of Rebuilding a Subaru Engine
- Can You Rebuild a Subaru Engine by Yourself?
- When to Consider Rebuilding Your Subaru Engine
- How Long Does a Subaru Engine Rebuild Take?
- Rebuild or Replace: Making the Right Choice
- Benefits of a Rebuilt Subaru Engine
- Subaru Maintenance and Repair Costs: A Broader Picture
- Finding a Reconditioned Subaru Engine
- Frequently Asked Questions About Subaru Engine Rebuilds
- The Bottom Line on Rebuilt Subaru Engine Costs
Understanding Subaru Engine Rebuild Costs
The cost of rebuilding a Subaru engine can vary significantly based on several factors, including the extent of the damage, whether you opt for a partial or full rebuild, and who performs the work. On average, you can expect the cost to rebuild a Subaru engine to fall between £2,500 and £4,000. This typically breaks down into the cost of the actual engine block, which might be around £1,500–£2,000, and labour costs, often around £2,000 based on 20 labour hours at £100 per hour.
DIY vs. Professional Rebuild Costs
Your financial outlay will differ considerably if you decide to tackle the rebuild yourself versus taking it to a specialist. A DIY approach will primarily cover parts and potentially external machining services for components like cylinder heads. Enlisting a professional, while more expensive due to labour, often ensures a quicker and more reliable outcome.
| Rebuild Type | DIY Cost (Approx.) | Mechanic Cost (Approx.) |
|---|---|---|
| Partial Rebuild (e.g., Top-End) | £1,300 - £2,000 | £2,300 - £4,000 |
| Full Rebuild | £2,500 - £3,000 | £3,500 - £6,000 |
A partial rebuild, often focusing on the top-end of the engine, is generally less complex and cheaper. However, if your Subaru is experiencing bottom-end issues, a full rebuild is usually the more efficient and recommended solution. The final cost will also be influenced by the number of components you choose to replace or rebuild. For complete peace of mind, some owners opt to replace more parts than strictly necessary during the process.
While DIY or an independent mechanic are generally the most affordable routes, taking your Subaru to a dealership for an engine rebuild can be significantly more expensive, often upwards of £6,000 or more, with a substantial portion of this sum allocated to labour costs.
The Detailed Process of Rebuilding a Subaru Engine
Once the decision to rebuild has been made, the intricate work begins. Rebuilding an engine is a meticulous process, tailored to the specific needs of your vehicle. It involves several critical stages, each requiring precision and expertise.
The Removal and Inspection
The first step involves carefully removing the old engine from your Subaru. Every component of the engine is then meticulously disassembled and thoroughly cleaned. Following this, a comprehensive inspection of each element is carried out to assess its wear and tear. This crucial stage determines which parts can be efficiently reused and which require replacement to ensure the longevity and performance of the rebuilt engine.
The Machining Stage
During machining, components destined for the rebuild are prepared to perfectly integrate with the rest of the engine. This can involve a variety of precision tasks such as smoothing, micro-polishing, straightening, and resurfacing. The goal is to bring each component back to an optimal condition, ensuring perfect alignment and function before reassembly.
Reassembly: The Heart of the Rebuild
This is arguably the most time-consuming and critical stage. Each component, whether old or new, is carefully installed back onto the engine block. Essential parts such as gaskets, seals, gears, bearings, and the timing belt are almost always replaced with new ones to ensure maximum reliability. The engine is rebuilt piece by piece, requiring immense care to ensure every element works in perfect harmony. Proper torque settings and precise alignment are paramount to the engine's future performance.
Thorough Engine Testing
Before the rebuilt engine is reinstalled into the vehicle, it undergoes rigorous testing. This critical step ensures that all adjustments can be performed off-vehicle, preventing issues once it's back in the car. Checks typically include verifying proper compression and ensuring every component performs its intended function flawlessly. Any identified issues are addressed immediately.
The Final Reinstallation
In the final stage, the newly rebuilt engine is carefully installed back into your Subaru, and all connections are meticulously re-established. Once fitted, the vehicle is started and usually taken for a comprehensive test drive. This ensures that everything is functioning optimally, and the rebuilt engine responds precisely to driver input, confirming its successful restoration.
Can You Rebuild a Subaru Engine by Yourself?
While the prospect of saving on labour costs by undertaking a DIY Subaru engine rebuild is appealing, it's crucial to understand the complexity involved. An engine rebuild is a highly intricate process that demands considerable expertise, specialised tools, and a clean, organised workspace. For most individuals, it's a job best left to a professional specialist to ensure the highest level of quality and reliability.
However, if you possess sufficient mechanical knowledge and feel confident in your abilities, a DIY rebuild can indeed save you a significant amount. The bulk of the work, from engine removal and disassembly to meticulous inspection of parts, will fall to you. You'll also need to source all necessary new parts, often from a Subaru dealer, and arrange for any components requiring machining, such as cylinder heads, to be sent to a professional machine shop. There might be a waiting period for these machined parts to be returned. Once you have all components ready, you can proceed with the reassembly and testing, just as a professional would, before reinstalling the engine.
Your experience will differ based on the scope of the rebuild. A partial, top-end rebuild is less demanding than a full rebuild, which is typically recommended for bottom-end engine issues and involves replacing or rebuilding virtually every part, from seals to engine blocks.
When to Consider Rebuilding Your Subaru Engine
Knowing when your Subaru engine might need a rebuild is key to preventing further damage and making an informed decision. Look out for these tell-tale signs that could indicate a necessary rebuild:
- Cracked Engine Block: Often caused by extreme heat or coolant leaks.
- Unusual Knocking Noises: Persistent or new knocking sounds from the engine are a serious warning sign.
- Frequent Leaks: Noticing consistent coolant or oil puddles beneath your vehicle.
- Discoloured Exhaust Smoke: Smoke from your exhaust that's blue (oil), white (coolant), or black (fuel) indicates internal issues.
While other vehicle components can cause these symptoms, it's imperative to have your car inspected by a specialist immediately if you notice any of them. A professional will accurately diagnose whether a rebuild or a full engine replacement is the most appropriate course of action.
How Long Does a Subaru Engine Rebuild Take?
The time required to rebuild a Subaru engine varies significantly depending on who is performing the work and the availability of parts. On average, a professional engine rebuild typically takes between 30 and 40 hours of labour. This estimate assumes all necessary parts are readily available and there are no unexpected complications.
If you undertake the rebuild yourself, expect the process to take considerably longer than a specialist. You're unlikely to dedicate continuous, long stints of time to the task, and unexpected issues may take longer for you to diagnose and resolve. If you rely on specialists, you can generally expect your vehicle back within a few days at most, whereas a DIY rebuild will demand a significant investment of your time alongside the financial outlay.
Rebuild or Replace: Making the Right Choice
When faced with a failing Subaru engine, the central question often boils down to: is it better to rebuild or replace? In most scenarios, rebuilding is the more financially beneficial option. While replacing the engine is quicker, it comes with a substantially higher cost. If your budget allows, rebuilding your existing Subaru engine is often the recommended path when advised to get a new one.
For those considering a DIY rebuild, assistance is available in the form of Subaru engine rebuild kits. These kits, typically costing between £140 and £600 depending on your Subaru model and the parts required, provide many of the necessary components. Another practical alternative is purchasing a rebuilt Subaru long block. A long block engine is a pre-assembled unit, including the cylinder heads, which significantly reduces the effort required for installation as you bypass the complex disassembly and reassembly process. A rebuilt Subaru long block can typically be acquired for an average price of £5,000 to £6,000, depending on your model.
Benefits of a Rebuilt Subaru Engine
Opting for a rebuilt Subaru engine offers a multitude of advantages beyond just cost savings:
- Extended Engine Life: A rebuild can significantly extend the operational life of your original engine, far beyond what might have seemed like its end.
- Cost-Effectiveness: It is a considerably more cost-effective solution than purchasing a brand-new replacement engine.
- Environmental Impact: A rebuilt engine can often achieve more mileage and contributes less to environmental pollution by reusing existing components.
- Enhanced Performance: With more components replaced and meticulously reassembled, your vehicle will often perform better immediately, skipping the adjustment period sometimes associated with a completely new engine.
Subaru Maintenance and Repair Costs: A Broader Picture
Understanding the general maintenance and repair landscape for Subarus provides valuable context when considering an engine rebuild. While Subaru vehicles generally have average reliability ratings, their yearly maintenance and repair costs are slightly above average compared to some competitors.
Average Annual Repair and Maintenance Costs: Subaru vs. Competitors
| Make | Average Annual Cost | Reliability Rating (out of 5) |
|---|---|---|
| Subaru | £617 | 3.5 |
| Lexus | £551 | 4 |
| Nissan | £500 | 4 |
| Hyundai | £468 | 4 |
| Toyota | £441 | 4 |
| Honda | £428 | 4 |
| Volvo | £769 | 3.5 |
| Ford | £775 | 3.5 |
| Mercedes-Benz | £908 | 3 |
| BMW | £968 | 2.5 |
| Land Rover | £1,174 | 2.5 |
Typical Subaru Maintenance Schedule and Costs
Regular maintenance is crucial for the longevity of any vehicle, and Subarus are no exception. While specific schedules vary by model, here's a general guide:
- Every 6,000 miles: Oil change, filter change, and tyre rotation.
- Every 12,000 miles: AC filter replacement and multipoint inspections.
- Every 30,000 miles: Brake fluid replacement, and inspections of drive belts, engine coolant system, and fuel system.
- Every 60,000 miles: Wheel bearing inspection and spark plug replacement.
Here are some typical maintenance costs for popular Subaru models:
| Service | 2019 Crosstrek (Approx.) | 2020 Forester (Approx.) | 2021 Outback (Approx.) |
|---|---|---|---|
| 6,000-mile service | £140 to £176 | £140 to £176 | £140 to £176 |
| 12,000-mile service | £237 to £318 | £255 to £344 | £255 to £344 |
| 30,000-mile service | £383 to £532 | £288 to £393 | £301 to £412 |
| 60,000-mile service | £521 to £734 | £437 to £611 | £457 to £641 |
| Professional oil change | £97 to £120 | £88 to £133 | £89 to £135 |
| Tyre rotation | £61 to £90 | £61 to £90 | £61 to £90 |
| Multipoint inspection | £230 to £338 | £230 to £338 | £230 to £338 |
| Coolant change | £513 to £627 | £436 to £515 | £465 to £544 |
Common Subaru Repair Issues and Costs
Beyond routine maintenance, Subarus, like any vehicle, can encounter specific repair needs:
- Catalytic Converter Malfunction: A failing catalytic converter can lead to failed emissions tests. Replacement costs typically range from £900 to £4,500.
- Blown Head Gasket: Historically, Subaru had a reputation for head gasket issues, though most design problems were reportedly resolved by 2014, making older models more susceptible. Head gasket replacements can range from £3,400 to £5,500.
- Front O2 Sensor Issue: Some Subaru vehicles have experienced cracks in the front oxygen sensor, leading to recalls where fixes are often provided free of charge.
Finding a Reconditioned Subaru Engine
If you're in the market for a reconditioned Subaru engine, various avenues can help you secure the best deals. Many online platforms and local engine suppliers offer price comparison services, connecting you with trusted vendors across the country. These networks often boast a vast and regularly updated stock of replacement engines for various Subaru models, including the Legacy, Impreza, and Forester. When searching, prioritise suppliers known for reliability and experience, ensuring they provide quality reconditioned engines with warranties for your peace of mind.
Frequently Asked Questions About Subaru Engine Rebuilds
Can you Rebuild a Subaru Engine?
Yes, a Subaru engine can absolutely be rebuilt. Rebuilding involves disassembling the engine, thoroughly cleaning its components, inspecting them for wear or damage, and then repairing or replacing any worn parts to restore the engine to its original specifications and performance. This process requires significant mechanical knowledge, specialised tools, and a clean working environment. It's crucial to adhere to the manufacturer's guidelines and use proper procedures to ensure the engine operates correctly and safely after the rebuild.
What is the Average Life of a Subaru Engine?
The average lifespan of a Subaru engine is typically around 100,000 miles. However, this figure can vary significantly depending on the specific Subaru model and how it's driven. For instance, turbocharged engines, like those found in the WRX, may have a slightly shorter lifespan than non-turbocharged counterparts. Driving habits also play a critical role; aggressive driving or frequent off-roading can reduce an engine's longevity. Nevertheless, with diligent care and consistent maintenance, many Subaru engines are known to last well over 200,000 miles.
Is It Better to Rebuild or Replace a Car Engine?
The decision to rebuild or replace a car engine hinges on several factors: the vehicle's age, the cost and availability of parts, the extent of the current engine's damage, and your budget. For older vehicles, rebuilding is often the more cost-effective choice, as it can restore the engine's performance to its original state and significantly extend its life. However, if the engine has severe, extensive damage, or if the combined cost of parts and labour for a rebuild approaches that of a replacement engine, then a replacement might be more sensible. It's also worth noting that rebuilt or used engines might come with shorter warranties or perform differently compared to a brand-new unit.
Are Subarus Reliable After 200,000 Miles?
The reliability of a Subaru vehicle beyond 200,000 miles is highly dependent on the model, its maintenance history, and the driving conditions it has endured. Generally, Subarus have a strong reputation for reliability and durability. Many models continue to perform smoothly even after 200,000 miles, provided they've received proper care and maintenance. Regular oil changes, timely repairs, and prompt attention to warning lights are essential for extending a Subaru's lifespan and maintaining its reliability. However, as with any high-mileage vehicle, some components may eventually wear out or require replacement.
Do Subaru Cars Last Long?
Subaru cars are indeed built for longevity, and owners can typically expect many years of service from them. It's not uncommon to see Subarus still running strong after 20 or even 30 years. This durability is largely attributed to the brand's commitment to high-quality construction and meticulous attention to engineering detail. While any car will eventually require repairs and maintenance, a well-cared-for Subaru will reliably serve its owner for a long time.
Why Are Subaru Engines So Good?
Subaru engines are highly regarded for their durability, reliability, and performance, thanks to several distinguishing factors:
- Boxer Engine Design: The horizontally opposed (boxer) cylinder layout provides a lower centre of gravity, enhancing balance and reducing vibrations.
- High-Quality Materials: Subaru uses robust materials and precise manufacturing processes.
- Symmetrical All-Wheel Drive: This system, combined with the boxer engine, provides superior traction and stability.
- Regular Maintenance: While not unique to Subaru, adherence to maintenance schedules is heavily emphasised and contributes to their longevity.
- Engineering Excellence: A focus on robust design and continuous improvement underpins their reputation.
What Is the Strongest Subaru Engine?
The Subaru WRX STI EJ25 is widely considered the strongest Subaru engine. This 2.5-litre turbocharged boxer engine is renowned for its high performance and exceptional durability, producing an impressive 305 horsepower and 290 lb-ft of torque, making it a favourite among performance enthusiasts.
The Bottom Line on Rebuilt Subaru Engine Costs
Rebuilding a Subaru engine represents a significant financial investment, yet it is almost invariably a more cost-effective solution than purchasing a brand-new replacement. You can typically expect to spend between £2,500 and £4,000 on a professional engine rebuild. A DIY approach will naturally incur lower costs, primarily for parts, while a dealership rebuild will be the most expensive option. Investing in new components during the rebuild process can increase the overall price but is a sound strategy for extending your engine's life and ensuring optimal performance.
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