What Causes a Flexplate to Crack? – Exploring the Reasons

A flexplate, also known as a flexplate or a flywheel, is a metal plate that connects the crankshaft of an engine to its transmission. It is designed to allow the transmission and engine to move independently of each other, which helps reduce vibrations and improve engine performance. However, flexplates can crack or break over time due to various reasons. Common causes of flexplate cracking include:

1. Over-torquing: Over-torquing a flexplate can cause it to become cracked or broken due to the excessive force placed on the metal.

2. Poor installation: If the flexplate is not installed properly, it can become misaligned and cause cracks or breaks in the metal.

3. Heat and vibration: Excessive heat and vibration can cause cracking in the metal due to fatigue.

4. Age: Flexplates are designed to last for many years, but eventually they will begin to wear out and crack due to age and usage.

5. Contaminants: If contaminants such as dirt or debris get into the flexplate, it can cause damage over time that could lead to cracking or breaking of the plate.

Automobile: What Causes a Flexplate to Crack?

A flexplate is an important component of an automobile’s drivetrain. It connects the engine crankshaft to the transmission and helps transfer power from one component to the other. Over time, however, a flexplate can become cracked or damaged, leading to a variety of problems with your vehicle. In order to properly maintain your vehicle, it is important to understand what causes a flexplate to crack and how best to go about repairing it.

Causes of Cracked Flexplates in Automobiles

There are a number of factors that can lead to the cracking or breaking of a flexplate in an automobile. The most common causes include physical damage, manufacturing defects, material corrosion, and poor maintenance. Physical damage occurs when the flexplate is subjected to excessive force or pressure which causes it to break or crack. Manufacturing defects occur when the flexplate is not manufactured correctly and does not meet required standards for strength and durability. Material corrosion can occur due to exposure to moisture or other corrosive substances, leading to weakened metal and eventual cracking or breaking of the flexplate. Finally, poor maintenance can lead to cracks in the flexplate due to inadequate lubrication or other issues with regular service intervals not being followed.

Signs and Symptoms of a Cracked Flexplate

The first signs that you may notice when your flex plate has become cracked are abnormal engine noise coming from the transmission area along with vibration in the drivetrain when accelerating or decelerating from a stop. In some cases, you may also notice leaks coming from around the transmission area which could be indicative of a cracked flex plate as well. If any of these symptoms are noticed, it is important that you have your vehicle inspected by a qualified mechanic as soon as possible in order to determine if there is indeed an issue with your flex plate that needs addressing.

Repairing a Cracked Flexplate

If your vehicle has been diagnosed with having a cracked flex plate then you will need to have it replaced by either an aftermarket part or by ordering an OEM replacement part from your local dealership depending on what type of vehicle you have. Once the new part has been installed, it is important that you take steps in order to determine what caused the original failure so that it can be prevented in future instances. This may involve checking for loose fasteners or worn out parts that could have contributed towards causing the initial crack in your flex plate as well as inspecting for any signs of corrosion on surrounding components which could be indicative of moisture having penetrated into your engine bay causing material weakening over time leading up to its eventual failure.

Prevention of Flexplate Cracks in Automobiles

In order for you reduce both potential damages as well as repair costs associated with having a cracked flex plate replaced on your vehicle then it is important that regular maintenance checks are carried out on all components associated with this system including fasteners and moving parts such as those located on both sides of the transmission itself. Additionally using quality parts along with appropriate grade fasteners will also help ensure optimal performance over time since they will be less likely break down prematurely leading up towards any potential failures occurring down line due too lack luster materials being used instead during initial assembly/installations processes when applicable .

Pros and Cons of Repairing a Cracked Flexplate

The repair process for replacing a cracked flexible plate can be costly depending on whether OEM parts are used versus aftermarket parts being sourced instead however this expense usually pales in comparison towards costs associated with having major repairs performed later down line should core components such transmission assemblies themselves become damaged due too weakened mounts stemming from unaddressed issues occurring earlier on such those involving cracks within existing flexible plates . As such being proactive about addressing potential problems before they arise will generally save money over time versus taking chances now only ultimately end up costing more later down line instead .

What is a Flexplate?

A flexplate is an important part of a vehicle’s drivetrain. It is a circular metal plate that connects the engine to the transmission and allows for the transfer of power from the engine to the transmission. Flexplates are typically made from steel or aluminum and can be found in both manual and automatic transmissions. The flexplate serves as an intermediate between the crankshaft and the torque converter, allowing for smoother engagement between the two parts.

What Causes a Flexplate to Crack?

The most common causes of flexplate cracks are due to excessive heat, improper installation, or high-rpm operation. Excessive heat can be caused by operating at too high of an engine speed, not changing oil often enough, or running too much boost pressure. Improper installation can include using bolts that are too long or short, not properly torquing them down, or not using proper gaskets between components. High-rpm operation can also cause flexplates to crack due to increased vibration and stress on the flexplate itself.

The Cost of Repairing a Cracked Flexplate

The cost of repairing a cracked flexplate depends on several factors including labor costs, parts costs, and difficulty of repair. Generally speaking, repairs will range from $200-$500 depending on how severe the damage is and how long it takes for repairs to be completed. If there is significant damage to other components such as bearings or seals then additional costs may be incurred as well.

The Cost of Replacing a Cracked Flexplate

Replacing a cracked flexplate can be costly depending on make/model/year/engine size/and transmission type. Generally speaking, replacing a flexplate will range from $400-$800 depending on these factors as well as any additional components that need to be replaced due to wear or damage caused by the cracked flexplate itself.

Alternatives to Repairing or Replacing a Cracked Flexplate

If your vehicle has sustained significant damage due to a cracked flexplate but you are unable or unwilling to repair or replace it then there are some alternatives you can consider. One option would be to have your car professionally inspected by an experienced mechanic who can assess any hidden damage and recommend any necessary repairs that may need to be done before continuing use with your current setup. Another option would be upgrading your current setup with stronger aftermarket parts such as high performance flywheels or higher grade torque converters which will help reduce wear on your current setup in addition to providing more power when needed.

Common Questions About Flexplates and Their Cracks

Some common questions people have about flexplates and their cracks include: How do I know if my flexplate has cracked? Can I drive my car if my flex plate has cracked? How do I go about repairing my cracked flex plate? What causes my flex plate to crack in the first place? Can I upgrade my existing setup with stronger aftermarket parts instead of replacing it entirely? All these questions vary in complexity so it’s best advised that you speak with an experienced mechanic who can provide answers based on specific make/model/year information about your vehicle as well as advise you on what steps should be taken next in order for you get back out on the road safely without risking further damage your vehicle’s drivetrain system over time due to extended use with an already damaged component like a cracked flex plate.

FAQ & Answers

Q: What causes a flexplate to crack?
A: Flexplates can crack due to physical damage, manufacturing defects, material corrosion, and poor maintenance.

Q: What are the signs and symptoms of a cracked flexplate?
A: Signs and symptoms of a cracked flexplate include abnormal engine noise, leaks from the transmission area, and vibration in the drivetrain.

Q: How do you repair a cracked flexplate?
A: To repair a cracked flexplate, you will need to replace any damaged components and determine the source of the damage.

Q: How can I prevent flexplate cracks in automobiles?
A: Regular maintenance checks and using quality parts and fasteners can help prevent flexplate cracks in automobiles.

Q: What is the cost of repairing or replacing a cracked flexplate?
A: The cost of repairing or replacing a cracked flexplate will vary depending on the make and model of your vehicle.

In conclusion, the most common cause of a cracked flexplate is due to an improper torque value when tightening the bolts. This can result in uneven force being applied to the flexplate, causing it to crack as it is unable to handle the strain. In addition, an engine misfire or other mechanical issue can cause an imbalance in the crankshaft and result in a cracked flexplate. Finally, an overly aggressive driving style can also lead to a cracked flexplate as excessive torque is applied during acceleration or gear changes.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

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