Dual Mass Flywheel » Replacement · Cost · Symptoms | UK (2023)

Typical symptoms usually occur with a dual mass flywheel failure. You can find out what these are and what causes a failure here. Also: What are average dual mass flywheel replacement cost in the UK and how to get free estimates?

How much does a dual mass flywheel replacement cost in the UK?

The average dual mass flywheel replacement cost in the UK is around £750-£1,500. The total cost will of course depend on the vehicle model, the design of the dual mass flywheel and the spare parts manufacturer. Unfortunately, the material costs are comparatively high. They can be £400-£1,200. Well-known manufacturers of dual mass flywheels are LUK, Sachs and Valeo.

The cost of removing the defective dual mass flywheel and installing the new one is comparatively high because the transmission always has to be removed. For this reason, it is usually worthwhile to have the clutch, which is also a high-wear part, replaced at the same time.

Depending on the vehicle, additional material costs of £100-£400 can be expected. For the change of the dual mass flywheel and clutch, a working time of about 3.5 to 7 hours can be expected. At an exemplary hourly rate of £70, this corresponds to a labour cost of about £250-£500.

Typical car models that may experience dual mass flywheel problems include Audi A4, Vauxhall Insignia, VW Caddy, VW Golf, VW Passat, Skoda Octavia, Ford Transit, Ford S Max, BMW 320 and BMW series 1. Below is an example of dual flywheel replacement cost (including a new clutch) for a VW T5:

Example: Dual mass flywheel replacement cost – VW T5

Overview

Cost

New dual mass flywheel

£520

New clutch

£250

Labour cost

£450

Total cost

£1,220

(Video) DUAL MASS FLYWHEEL PROBLEMS, SYMPTOMS AND COST OF REPLACEMENT

Money saving tip: Replace dual mass flywheel and clutch at the same time!

It is advisable to replace the clutch at the same time as a dual mass flywheel because the transmission has to be removed anyway. A new clutch kit is comparatively inexpensive and since the labour costs make up the largest part and a failure of one of the two components would also affect the other, it is always worthwhile to replace both at the same time.

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What does a dual mass flywheel do?

A dual-mass flywheel is a wheel that has an integrated damper. It prevents oscillations, vibrations and shocks from being transmitted to the driveline while driving. In this way, it decisively increases driving comfort by ensuring a steadier and smoother ride.

Road noise is also significantly reduced and shifting gears is easier than with other wheels. Last but not least, the dual-mass flywheel also affects your car’s fuel consumption, helping to make it more environmentally friendly. Many modern motor vehicles are already equipped with dual-mass flywheels.

What are signs and symptoms of a dual mass flywheel failure?

(Video) HOW TO IDENTIFY DUAL MASS FLYWHEEL FAILURE|CLUTCH NOISY|FLYWHEEL FAIL|AUTOKRAZE|ENGINE VIBRATION

The clear identification of a dual mass flywheel failure is comparatively difficult and can only be carried out safely by an experienced mechanic. Essentially, there are two main symptoms that can be used to identify a faulty dual mass flywheel:

  • The engine makes scratching noises, especially at lower speeds
  • When the engine is running, there is a jerking, shaking or vibrating sound

However, these can also be caused by other damage to the transmission or a defective throw-out bearing. A dual mass flywheel failure can only be detected with certainty once the transmission has been removed.

If the symptoms are ignored, components may come loose from the faulty dual mass flywheel, enter the transmission and cause transmission damage. The car is then no longer roadworthy and additional repair costs are high.

Dual mass flywheel failures are not uncommon. Often, these are not wear or damage due to mechanical effects, but rather consequential damage caused by other defects, such as on the clutch. For this reason, a damaged clutch should be repaired promptly for the benefit of the dual-mass flywheel condition.

Damage that can occur to the dual mass flywheel includes fractures, worn friction surfaces, thermal overloads or leaked lubricant as well as a defective gear rim. Even though dual mass flywheels are very sturdy, they cannot always withstand the high loads to which they are subjected on every journey without damage.

Can a dual mass flywheel be repaired or does it need to be replaced?

Repairing a defective dual mass flywheel is not possible. Only replacing the defective component with a new part makes sense here. Used spare parts are not a sensible option either, because the exact condition is not visible from the outside and the effort required to remove the transmission would otherwise be duplicated.

To replace the defective dual mass flywheel, the transmission must be removed. The exact procedure varies depending on the exact vehicle model and can be very time-consuming depending on the design.

How long does the garage need to replace dual mass flywheel and clutch?

The time required varies depending on the car model and the workshop, but on average it takes around 3.5 to 7 hours to change the dual-mass flywheel and clutch.

(Video) Dual mass flywheels (dmf) what are they and how to diagnose

Can I drive with a faulty dual mass flywheel?

It is recommended to visit a repair shop promptly. While it is possible to continue driving at first when you detect a dual mass flywheel failure, you should not ignore the symptoms indefinitely. Otherwise, components could come loose and enter the transmission. There, they could possibly cause damage to the transmission.

How can I reduce the dual mass flywheel replacement costs?

»Have dual mass flywheel and clutch replaced together Due to their design, dual mass flywheels and clutches are installed directly next to each other.Both components transfer the rotary torque, are exposed to high loads and are subject to considerable wear. For this reason, the dual mass flywheel is typically checked as a precautionary measure before the clutch disc is repaired or replaced. The time and effort required to install the new clutch would be wasted if a dual mass flywheel that has not been identified as faulty continues to be used. The additional high costs should not be underestimated either. It is therefore alwaysworth replacing both.

»Get free dual mass flywheel replacement estimates

The dual mass flywheel replacement cost varies not only between car models, but also from city to city and garage to garage. The costs in cities like London, Manchester or Birmingham are always somewhat higher than in the rest of the UK. For this reason, it is always advisable to do a regional price comparison in order to find the best value for money in your area.

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(Video) How To Check Your DMF Dual Mass Flywheel The Correct Way

FAQs

How do I know if dual mass flywheel needs replacing? ›

Symptoms of a worn or broken DMF include increasing vibrations, especially through the clutch pedal. A bad DMF can make the motor appear to have a misfire and rough idle as well. You may also hear a rattle, which will disappear when you depress the clutch.

How do you diagnose a failing dual mass flywheel? ›

Visual Inspection of a Dual Mass Flywheel
  1. Check the friction surface for excessive heat checks and scoring. ...
  2. Check for excessive grease loss due to overheating. ...
  3. Check for visible damage including the ring gear, and other parts found inside the bellhousing.
  4. Check the rotational free play. ...
  5. Check for secondary plate rock.

Do you have to replace dual mass flywheel with clutch? ›

If you are fortunate and the flywheel has not been damaged by a worn clutch-plate, its replacement will simply not be deemed necessary. However, increasingly, owners of cars fitted with dual-mass flywheels must foot the bill for replacement, in addition to the cost of a new clutch-plate and its ancillary parts.

Can you drive with a faulty dual mass flywheel? ›

Driving with a faulty dual mass flywheel is possible. However, it would be best if you didn't consider it because of its effects. A faulty dual mass flywheel is characterized by rough idling and unexpected misfire.

What happens when a dual mass flywheel fails? ›

When this happens the flywheel will no longer be able to adequately filter out violent variations of torque or revolutions that could cause an unwanted vibration or rattle when driving. These vibrations can usually be felt on the floor of the car and are due to the failure of the springs and other internal components.

How long does it take to change a dual mass flywheel? ›

The time required varies depending on the car model and the workshop, but on average it takes around 3.5 to 7 hours to change the dual-mass flywheel and clutch.

Can a dual mass flywheel be replaced with a solid one? ›

SMFS ARE THE RIGHT SOLUTION FOR CERTAIN VEHICLES

The SMF allows DMFs to be replaced with a traditional solid flywheel and clutch kit.

What causes flywheel damage? ›

Here are some of the most common causes: i Improper maintenance. If components such as a new starter or clutch are not installed properly, other parts could get damaged or become misaligned. To add to this point, if the clutch gets damaged, it is highly advisable to get it replaced as soon as possible.

What type of concerns can be caused by problems with a dual mass flywheel? ›

It is not recommended to drive with dual-mass flywheel problems. If your flywheel is damaged, it can cause several problems. First, it can damage the clutch by putting too much stress on it. Additionally, it can cause vibrations that may make driving uncomfortable or even dangerous.

What does a damaged flywheel sound like? ›

This noise sounds like a rattle or whine coming from the gear box, and it's commonly referred to as "gear rollover noise" or "gear rattle." While it may seem counter-intuitive, this noise is not a symptom of a problem. The noise is a natural consequence of the vehicle design.

Why are dual-mass flywheels so expensive? ›

The main reason these jobs tend to be more expensive than with typical older type clutch jobs is the price of the parts. A standard style flywheel is much more durable so does not often need to be changed. On top of that the dual mass is a much more intricate part and so costs range from a few hundred to over £1000.

What happens when a flywheel breaks? ›

The most common symptom of a bad flywheel is bad noises during idle. You can also feel vibrations, gear slippage, or a burning smell coming from the transmission. You may also notice other shifting issues. While there are not all the possible signs, it's the most common ones.

Is a solid flywheel better than a dual mass flywheel? ›

Modern flywheels utilize a more effective dual-mass design in response to harsher, downsized engines used in new cars. While dual-mass flywheels provide a smoother and more refined driving experience, they are not perfect.

Can a dual mass flywheel be skimmed? ›

A BMW dual mass flywheel should not be skimmed. In contrast to a solid flywheel, a dual mass has a damper section in the center.

Why dual mass flywheel is required? ›

The dual mass flywheel allows driving at lower engine speeds thus increasing engine efficiency. This in turn saves fuel and reduces CO2 emissions as well as any vibration that can cause “gear rattling” & “body booms”. As with any wearing component, over time the damping springs and mechanism begin to wear and weaken.

What's the purpose of a dual mass flywheel? ›

A dual-mass flywheel (DMF or DMFW) is a rotating mechanical device that is used to provide continuous energy (rotational energy) in systems where the energy source is not continuous, the same way as a conventional flywheel acts, but damping any violent variation of torque or revolutions that could cause an unwanted ...

What does a loose torque converter sound like? ›

Torque the bolts in a crisscross pattern according to the manufacturer's specifications. Loose flywheel or flexplate bolts make a rattling or knocking sound that changes with engine speed. ... A loose bolt on a flexplate or a crack between the bolt holes can result in the same knocking or rattling sound.

Can a flywheel damage a transmission? ›

A bad flywheel can lead to costly repairs for your transmission. A bad flywheel can definitely cause damage to the transmission of your car. The flywheel is responsible for transferring power from the engine to the transmission, so if it's not working properly, it can cause a lot of damage.

Can flywheel cause car to shake? ›

The symptoms of a bad flywheel can include difficulty changing gears, a burning smell, a judder in the clutch pedal, a slipping clutch and a vibration in the clutch straight after releasing the clutch pedal. A properly functioning clutch flywheel is essential when it comes to keeping your car going.

How often does a dual mass flywheel need replacing? ›

That's why many experts recommend replacing a dual mass flywheel when changing a clutch – especially if the flywheel has more than 80,000 or 90,000 miles on it. The flywheel should be considered a wear item just like the clutch, and should be replaced when a new clutch is installed.

Does flywheel affect fuel consumption? ›

"The flywheel's stored energy is sufficient to power the car for short periods,” he explained. “This has a major impact on fuel consumption. Our calculations indicate that it will be possible to turn off the combustion engine about half the time.”

Does flywheel affect fuel economy? ›

Controlled tests showed a 21% reduction in fuel economy where a single mass flywheel replaced a dual mass flywheel on a vehicle where it was designed to take the dual originally.

Can a single mass flywheel fail? ›

Vibrations and Noise – Single mass flywheels fail at everything a DMF was designed to do.

Do all diesels have a dual mass flywheel? ›

Do all modern cars have dual mass flywheels? Not all modern diesels have dual mass. Cheaper cars with less powerful engines and older transmissions usually don't have them. For example, Peugeot often offers the same engine with an older five-cylinder that doesn't have dual mass and a newer six-cylinder that does.

Which cars have dual mass flywheel? ›

Even more recently, dual-mass flywheels have found their way into more every-day vehicles like Acura TL, Ford Focus, Hyundai Sonata, and Nissan Altima.

Can flywheel cause vibration? ›

The wrong flywheel or a flywheel that isn't balanced will cause a vibration as will all the engine problems listed above. The vibration picks up intensity the faster you go and it's not the tires or wheels.

How much is it to change a flywheel? ›

Somewhere in the lifespan of owning a vehicle, you might need to replace the flywheel altogether. On average, it costs around $170 to replace an automobile's flywheel for parts alone or $887 for parts and labor combined, where the average cost of parts is $170 and the average cost of labor is about $717.

Can flywheel cause knocking noise? ›

Loose Flyweel Bolts

Loose flywheel or flexplate bolts make a rattling or knocking sound that changes with engine speed. It's heard behind the engine, where it mounts to the transmission bellhousing.

How long will a rattling flywheel last? ›

You may also hear a rattle, which will disappear when you depress the clutch. DMFs can last more than 100,000 miles but may go bad in as little as 20,000 - it depends on the quality of the part and especially your driving style.

Does a flywheel always spin? ›

So, you might think the flywheel spins all the time. That's not true. The flywheel does not spin when in neutral. This is because the input shaft that connects to the clutch plate; then to the pressure plate which connects to the flywheel is designed to spin freely when the vehicle is in neutral.

How long should a flywheel last on a car? ›

But what about key engine components, like the flywheel? Experts say this expensive part should last at least five years, but reader David Arenstein of Kings Langley, Hertfordshire, is due his fourth one in as many years.

How long does it take to replace a flywheel? ›

Depending on the model and make of the vehicle, the average time for flywheel replacement is between five to nine hours.

How long does it take to change clutch and flywheel? ›

Generally changing a clutch can take anywhere between 2 to 6 hours.

What is the lifespan of a dual mass flywheel? ›

In general, most dual-mass flywheels last around 100,000 miles, however this is a very general estimate and it is not uncommon for flywheel failure to occur before then.

What does a failing flywheel sound like? ›

If you notice a rattle or vibration when driving, and the clutch seems to slip in the higher gears, but you do not smell burning friction material, you're dual mass flywheel is failing.

How long will a noisy DMF last? ›

You may also hear a rattle, which will disappear when you depress the clutch. DMFs can last more than 100,000 miles but may go bad in as little as 20,000 - it depends on the quality of the part and especially your driving style.

How long does it take to change a dual mass flywheel? ›

The time required varies depending on the car model and the workshop, but on average it takes around 3.5 to 7 hours to change the dual-mass flywheel and clutch.

Can a dual-mass flywheel be replaced with a solid one? ›

SMFS ARE THE RIGHT SOLUTION FOR CERTAIN VEHICLES

The SMF allows DMFs to be replaced with a traditional solid flywheel and clutch kit.

What causes flywheel damage? ›

Here are some of the most common causes: i Improper maintenance. If components such as a new starter or clutch are not installed properly, other parts could get damaged or become misaligned. To add to this point, if the clutch gets damaged, it is highly advisable to get it replaced as soon as possible.

Why are DMF so expensive? ›

The idea is that the rubber creates smoother operation of the clutch release and reduces vibration in modern cars. The main reason these jobs tend to be more expensive than with typical older type clutch jobs is the price of the parts. A standard style flywheel is much more durable so does not often need to be changed.

Can flywheel cause knocking noise? ›

Loose Flyweel Bolts

Loose flywheel or flexplate bolts make a rattling or knocking sound that changes with engine speed. It's heard behind the engine, where it mounts to the transmission bellhousing.

What are the signs of clutch failure? ›

What are the signs of manual clutch failure?
  • When you press the clutch pedal, it's spongy, sticking, vibrating or loose.
  • There's a squeaking or grumbling noise when the clutch pedal is pressed.
  • You're able to rev the engine but notice that it's difficult to accelerate.
  • You're having difficulty shifting gear.
18 Feb 2022

Can you replace flywheel without clutch? ›

REPAIR OPTIONS

The flywheel should be considered a wear item just like the clutch, and should be replaced when a new clutch is installed. Surface wear is another reason for replacement. The friction surface of a dual mass flywheel will wear the same as an ordinary flywheel as a result of normal clutch operation.

Can a dual-mass flywheel cause vibration? ›

Torsional vibrations are caused by the twisting force of the engine's crankshaft. These vibrations can be amplified by a failing dual-mass flywheel, causing a shaking or vibrating sensation in the car. This can be a very dangerous problem as it can cause damage to other parts of the car if left unchecked.

Can a flywheel cause vibration? ›

The symptoms of a bad flywheel can include difficulty changing gears, a burning smell, a judder in the clutch pedal, a slipping clutch and a vibration in the clutch straight after releasing the clutch pedal.

Why does my flywheel make noise? ›

The flywheel may make a light beeping noise that is most notable when pedaling very slowly or coasting - this is the control system frequency and is normal - there are no additional steps to take. This noise should be faint and difficult or impossible to hear when pedaling the bike normally.

Does flywheel affect fuel consumption? ›

"The flywheel's stored energy is sufficient to power the car for short periods,” he explained. “This has a major impact on fuel consumption. Our calculations indicate that it will be possible to turn off the combustion engine about half the time.”

How does a dual mass flywheel break? ›

The main reasons are: Heat - Excessive heat is a big cause of most dual mass flywheel failures. A slipping clutch generates heat; if your clutch is worn, you can still save the flywheel if you get the clutch replaced early enough.

Does flywheel affect fuel economy? ›

Controlled tests showed a 21% reduction in fuel economy where a single mass flywheel replaced a dual mass flywheel on a vehicle where it was designed to take the dual originally.

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