Description

NEW Subaru WRX STi 2.5 DOHC CYLINDER HEADS #B25

NEW Subaru WRX STi IMPREZA forester DOHC TURBO CYLINDER HEAD CASTING NUMBER B25

PLEASE INCLUDE YOUR AREA CODE AND TELEPHONE NUMBER

LEARN ABOUT THE SUBARU BOXER ENGINE: https://www.sportsubaru.com/subaru-boxer-engine.htm

CHECK OUT OUR OTHER SUBARU LISTINGS: https://www.cylinder-heads.com/?s=SUBARU&post_type=product&dgwt_wcas=1

A cylinder head is an essential component of an internal combustion engine. It sits atop the engine block and forms the top of the combustion chamber. It contains the intake and exhaust valves, spark plugs, and fuel injectors, all of which play critical roles in the engine’s operation. During the engine’s operation, the cylinder head seals the top of the combustion chamber to contain the extreme pressures and temperatures generated during the combustion process. The intake valves allow the air-fuel mixture to enter the combustion chamber, while the exhaust valves allow the burned gases to exit. The spark plugs ignite the air-fuel mixture, initiating the combustion process. The fuel injectors ensure that the correct amount of fuel is delivered to the combustion chamber. Overall, the cylinder head is responsible for controlling the flow of air and fuel into the combustion chamber and the evacuation of exhaust gases, ultimately contributing to the engine’s performance and efficiency.

Clearwater Cylinder Head, Inc. thoroughly cleans, inspects, and pressure tests all our cylinder heads. All seat and guide work is performed as needed on the lastest state of the art Serdi or Sunnen seat and guide machine. The head then moves on to a Rottlier CBN resurfacing machine where it is cut to the required RMA finish. We then install a quality valve seal and pull a vacuum on each valve to insure there is a perfect seal between the valve and the seat. All machine work performed on the latest state of the art equipment. Head is complete and ready for installation.

WE ARE A HUGE CYLINDER HEAD SHOP WITH THOUSANDS OF HEADS IN STOCK. WE DEAL WITH ALL MAKE AND MODEL CYLINDER HEADS. IF YOU DO NOT SEE THE CYLINDER HEAD YOU NEED PLEASE CONTACT US 1-800-572-1963.
HAVE A RARE OR HARD TO FIND CYLINDER HEAD? LET US REBUILD YOUR CYLINDER HEAD FOR YOU.
Hours of operation Monday – Friday 8 AM to 5 PM EST

SHIPPING RATE APPLIES TO CONTINENTAL UNITED STATES ONLY. ALASKA, HAWAII, GUAM, VIRGIN ISLANDS, AND PUERTO RICO PLEASE E-MAIL OR CALL FOR SHIPPING RATES
SHIPPING INFORMATION: We ship worldwide.
Insurance, packaging, and handling are all included in the shipping price.
International Bidders, when inquiring about shipping fees please include city, country AND POSTAL CODE.

YOUR OLD CYLINDER HEAD:
We have no up-front core charge and we give you 30 days to return the core.
We make it easy for you to return your core as we provide you with a prepaid UPS peel and stick return shipping label located with the invoice on the outside of the box behind the plastic. Just put your core head in the box that you received your new/rebuilt head in and attach the prepaid peel and stick label. You may then give the box to any UPS driver you may see, or take the box to any UPS pickup point. We will accept your old cylinder head no matter what is wrong with it as long as it includes all the parts that the new head came with. You will never be charged extra because your old head is damaged. Cracked head? OK! Bent valves? NO PROBLEM! Head taken apart? UNDERSTANDABLE! (as long as you put all of the parts in the box). We have no up-front core charge.

WARRANTY INFORMATION: Clearwater Cylinder Head, Inc. provides a TWO(2) year unlimited mileage warranty. A copy of the warranty card will be enclosed with your invoice.
Clearwater Cylinder Head, Inc.
5100 Ulmerton Road #2
Clearwater, FL 33760 USA
Clearwater Cylinder Head, Inc. is dedicated to quality craftsmanship and is pleased to offer this warranty. We invite you to read this entire document carefully prior to installing your cylinder head.
Please do not hesitate to contact us should you have any questions.
1) Acceptance of this head constitutes acceptance of this warranty.
2) Heat tab must be in place on head, not altered or melted.
3) Any claim must be returned to Clearwater Cylinder Head, Inc. for inspection. A copy of invoice must accompany head. A Return Authorization number must be obtained.
4) Only 1 (one) warranty per purchase.
5) Warranty begins at the date of purchase.
6) No incidental, consequential, punitive or over the road damages.
N O L A B O R
WARRANTY COVERS:
Parts Warranty only – All original cylinder heads must be returned for warranty.
WARRANTY DOES NOT COVER:
1) Damage caused by improper installation, accidental over heating, abuse or neglect.
2) Loss of time, use of vehicle, phone calls, inconvenience or consequential charges.
3) Fluids, tow charges, rentals or diagnosis.
4) Repairs made without prior authorization will void all warranties.
5) No warranty on Commercial, Industrial Racing/ Pro stock or Marine Use
If you are not in the United States and you want a shipping quote please include your country and postal/zip code when inquiring.

How to Know If You Need a New Cylinder Head?

Every engine is due for repairs from time to time. Among the most important pieces of most engines is the cylinder head, which, if damaged, can prove increasingly perilous the longer it goes unrepaired. Here are some warning signs and symptoms which may be caused by cylinder head damage.

Weak Engine

Cylinder heads are responsible for containing and directing the internal combustion of an engine’s cylinders, meaning if that ability is hindered, the engine’s efficiency and power may take a hit. This can be seen in lower gas mileage, sluggish acceleration, and difficulty getting up steep inclines.

The Verdict: This is most often among the first signs of a cracked cylinder head, and usually can be repaired if caught in its early stage.

Oil Leakage

Oil is responsible for lubricating the engine’s mechanical parts, including the cylinder head. A cracked cylinder head can cause this to leak, which can be most noticed by a puddle of oil forming on the ground when the vehicle is parked for a long enough time. Such a sign can be a cause for concern, as oil or coolant may also back up into the engine’s internal chambers if the crack is large enough.

The Verdict: Usually, unless oil has backed up into the engine and caused any damage to other parts, a leaking cylinder head can still be repaired and may not require replacement.

Coolant Leakage

Coolant is responsible for cooling the engine, cylinder head, and many other processes. Similarly to oil, a cracked cylinder head can cause coolant to leak. This can be noticed by either a puddle forming beneath the car when parked or an overheating warning lighting up on the vehicle’s dashboard. Coolant can potentially contaminate the oil, and therefore the cylinder head should be repaired as soon as possible.

The Verdict: Unless the coolant has contaminated the oil due to a large enough crack in the cylinder head, at this stage the head can usually be repaired, not replaced.

Engine Misfires

Within an engine’s cylinders, air and gas form a pressurized mixture which explodes upon ignition, creating power. A cracked cylinder head may be unable to create the required atmosphere for proper combustion within those cylinders, leading to failures to combust, or engine misfires. The engine may die repeatedly during use, or fail to start at all.

The Verdict: This is a more severe sign, and usually is indicative of serious damage. It’s always better to take a cylinder head in for repairs or replacement if it starts to show signs of wear, to avoid even higher repair bills when the cylinder head’s failure leads to damages elsewhere in the vehicle.

Smoke

White smoke coming from the engine can indicate a catastrophic failure of the cylinder head, in which exhaust gases are vented directly into the engine space. This is the last stage of total cylinder head failure, and should be avoided by simply going in for repairs at the first signs of damage.

The Verdict: A cylinder head at this stage must be replaced as soon as possible, as it’s either venting exhaust gases or causing coolant to contaminate the oil, neither of which are healthy for any vehicle’s systems.

The Cylinder Head Repair Experts

Since repairing bad cylinder heads or gaskets is not a typical DIY project, we recommend that you consult a professional company. Clearwater Cylinder Head Inc. (CCH) is a reputable, experienced (over 25 years) dealer. We specialize in providing quality and warranty-backed rebuilt cylinder heads for a variety of vehicles (cars, trucks, boats, etc). With a massive online catalog of cylinder heads, we most likely have the cylinder heads for your repair needs. The knowledgeable staff at CCH is happy to help you find the cylinder head that is right for your vehicle. Please contact Clearwater Cylinder Head Inc. toll-free at 1-800-572-1963.

The cylinder head is one of the most vital parts to your car’s mechanics; your gas-powered car could not work without it. The cylinder head and head gasket sit atop the engine block over the cylinders. The head covers and protects the engine components and creates the correct vacuum for the engine to work. The cylinder head works along with the camshaft, induction and exhaust systems to process the fuel, air, and exhaust to provide your car’s horsepower. Damage, such as, leaks or cracks, in your cylinder head can cause monumental damage to your engine. The correct shape, size, quality, and use of your cylinder head can make all the difference in how your car runs and can help avoid costly engine repairs. To choose the best cylinder head for your specific needs follow these tips for “5 Things to Check Before Buying a Cylinder Head” when choosing a rebuilt, remanufactured, or new cylinder head…

1. Choose a Compatible Head – Only choose from cylinder heads designed for your car’s specific make, model, year, engine size, and engine enhancements (turbo, supercharger, etc.). Choose a cylinder head metal (aluminum or cast iron) that is compatible with what your engine block is made of as the metals contract and expand at different rates; mismatched cylinder heads are prone to cracking. Choose a cylinder head with right hardware (bolts) for the engine block to ensure your head will fit correctly.
2. Consider Intake and Exhaust Port Volumes – Bigger intake port volumes are not always necessarily better; depending on engine size and/or application, smaller intake ports may be more suitable. Smaller intake ports often provide better performance for street application as they produce more low-end torque and crisper throttle response, while larger intake ports are more beneficial for larger or higher-revving engines as they allow for more air flow. Choose a good-flowing exhaust port that is the correct size, by comparing to stock exhaust port volume and valve size for your specific engine.
3. Determine the Combustion Chamber Size and Design needed for Your Engine – Choose a combustion chamber size that raises the compression ratio to maximize your engines efficiency, while matching the components of your specific engine, such as, bore, stroke, head gasket, and piston shape, as well as, deck clearance and ring location.
4. Consider Application – Whether you are using your car for street or off-road driving or drag, circle track, or road racing, deciding the primary application for your engine is important is picking out the cylinder head to best fit your needs. Valve lift, air flow, and duration can be altered to provide the best performance for your car’s specific application.
5. Buy from a Reputable Dealer – Choose cylinder heads from a reputable dealer! Clearwater Cylinder Head Inc. (CCH) is dedicated to providing customers with quality cylinder heads backed by their warranty. The knowledgeable associates at CCH would be happy to help you in choosing the cylinder head that is right for your specific needs. Contact Clearwater Cylinder Head Inc. toll free at 1-800-572-1963 or by email at cchcylheads@aol.com.

Why Does A Cylinder Head Need To Be Replaced?

At various times in your vehicle’s life, you may experience performance issues that stop it from working to its full capacity. A cylinder head failure is a common issue. A cracked or broken head can prevent your engine from performing to the best of its ability. Keep reading to discover why your cylinder head might fail and when you would need to replace this part in the future.

 

Why Does a Cylinder Head Fail?

The number one reason that we see cylinder heads fail is due to overheating. This overheating can be caused by coolant loss or restricted flow of the coolant. When a cylinder head is cracked or damaged, it can result in damage to your whole engine in some cases, which is why it’s critical to act upon this issue as soon as possible. If you notice high oil consumption, your engine overheating, or poor fuel mileage, then make sure you get your cylinder head and engine checked out to see if a replacement is the best option for you.

 

Why Is The Cylinder Head Important?

The cylinder head is designed to control the airflow in and out of the cylinders. It helps to control the fuel deployment process, holding the injectors and valves. In fact, it actually contains more moving parts than you’ll find elsewhere in the engine, which is why it’s critical for the overall performance of your engine.

The cylinder head was originally invented by Samuel Dalziel Heron, an aerospace engineer born in Britain. During his time working there, he researched the first air-cooled cylinders before relocating to the USA to continue his career. The cylinder head is now an instrumental part of any vehicle, with various designs based on the car you are driving. It’s important to learn the signs of a cracked cylinder head, which will ensure you get it replaced or repaired when needed.

 

How Do You Know If Your Cylinder Head Is Cracked or Damaged?

If you have a cracked cylinder head, there are many signs you might notice to indicate this. Firstly, you may notice white smoke or steam coming from the exhaust pipe, suggesting a failure in this area. Low coolant levels or the engine overheating are other common symptoms of a cracked cylinder head.

Your vehicle performance is likely to be impacted if your cylinder head is cracked, with poor running conditions or misfiring. The warning lights may be illuminated on your dashboard, suggesting you need to check the engine. Finally, combustion gases in the cooling system are another common issue we see when the cylinder head cracks, encouraging you to seek assistance from a garage as soon as possible.

 

Can A Damaged Cylinder Head Be Repaired?

Now that you know the key signs of a cylinder head needing a repair, you might be wondering if this is even an option in the first place. The good news is that a cracked cylinder head can be repaired, but this option will naturally depend on the number of cracks in the cylinder head and the severity of these cracks. Pinning and welding are the most common techniques used when it comes to cylinder head repairs, offering a relatively fast and cheap repair solution. The cost of the repair will vary on how much work is needed, as well as whether parts need to be purchased. You’ll want to speak with a professional to assess your unique situation and discover whether it’s realistic for your cylinder head to be repaired.

 

Should You Buy A Used Car With A Damaged Cylinder Head?

Used cars are a great way to save money on your next car purchase. If you’ve found the perfect vehicle for you, but it comes with a damaged cylinder head, you’ll want to ensure you assess this situation very carefully before going ahead with the purchase. We don’t necessarily recommend completely ruling out this option though. As shared above, repairing a cylinder head is a realistic solution for many vehicles, but it will all depend on how severe the damage is to the engine. You’ll want to get a used car checked out by a mechanic first to ensure you aren’t purchasing a vehicle that’s completely past the point of repair. By taking the time to research your options and learn more about the repair process, you can figure out if this is a sensible move for you.

 

Cars Known for Cylinder Head Problems

Some vehicles are more likely to require a cylinder head replacement than others, which is worth researching when considering your next car purchase. The 2011 Chevrolet Cruze often comes out on the top of the list for issues with the cylinder head, and you’ll find there are other similar vehicles on the market that may be less problematic. You may be surprised to learn that multiple BMWs are also known for having these issues because they all share the same engine. Keep in mind that this can be a very costly replacement in this type of vehicle, with BMW X1 owners often paying thousands of dollars at a BMW dealership for the repair. A local mechanic is likely to offer you a better rate, which is where we’d always suggest going for your work.

Other vehicles which commonly experience cylinder head issues include the 2011 Buick Lucerne, the 2011 Subaru Impreza, and the 2015 Buick Encore. Remember, no matter what vehicle you drive, it’s critical to be aware of the signs of a cracked cylinder head to protect your engine in the future.

If you notice the signs of a cracked cylinder head when driving, we always recommend checking out your engine and this part as soon as possible. The longer you leave the issue when driving, the more likely you will experience further damage to your vehicle in the future. While there are some vehicles that are more likely to have this challenge in the future than others, be aware that your cylinder head is critical for a safe driving experience, so make sure you do all you can to keep it in top condition.

Replacing Cylinder Heads in a Subaru

Subaru Corporation (formerly known as Fuji Heavy Industries) is a Japanese headquartered automobile manufacturer. As Fuji Heavy Industries, the company’s focus was aircraft research and manufacturing. In 1953, Fuji Heavy Industries’ CEO, Kenji Kita, desired to get the company involved in car manufacturing and on July 15th the Subaru Corporation was born. Subaru is the Japanese name for the Pleiades “Sever Sisters” star cluster (one star is said to be invisible), thus Subaru’s six star logo. As the 22nd largest automaker in the world, Subaru is known for its Boxer engine design and all-wheel drive capability, making Subaru popular for off-road vehicles and sports cars. Popular Subaru vehicles include the Subaru Outback, Subaru Forester, Subaru Impreza, Subaru Crosstrek, and Subaru Legacy.

Subaru’s famous Boxer engine is an aluminum constructed horizontally-opposed flat engine with cylinder that lay on their sides. Half of the engines cylinder lie on the left side of the engine and half on the right separated by a crankshaft. The engines pistons face away from each other in an 180˚ symmetrical layout and move horizontally. Subaru’s unique engine layout provides many benefits. The engines symmetry provides good rotational balance and thus, a smoother, less vibrational feel. Its flatter and lighter design allows the engine to be mounted lower in the vehicle providing a lower center of gravity and safer, more stable handling – good for off-roading and racing.

Due to the Subaru Boxer engine’s unique design, it requires equally as unique cylinder heads. The cylinder head (along with the head gasket) is the portion of the engine that sits over the cylinders protecting the engine components and creating the correct vacuum for a gas-powered engine to work. The cylinder head works with the camshaft, induction, and exhaust systems to process fuel, air, and exhaust giving your car its horsepower. Leaks or cracks in your cylinder heads can cause excessive damage to your engine. Vehicles require the correct shape, size, and quality of cylinder heads to work properly and help avoid costly engine repairs. Click here to purchase Subaru cylinder heads!

NEW Subaru WRX STi 2.5 DOHC CYLINDER HEAD #B25