What is BMW dual mass flywheel?

Found toward the end of the crankshaft, it has protective qualities that keep other parts intact and shielded from engine vibration. The part is named “dual” mass flywheel because it includes two separate flywheels that are autonomous of one another; one connects to the engine, the other to the gearbox input shaft.

Can a BMW dual mass flywheel be resurfaced?

Dual Mass Flywheels can NEVER be resurfaced. You must either replace the flywheel with a new Dual Mass Flywheel or, if the option is available, convert to a single mass solid flywheel replacement.

How many miles does a dual mass flywheel last?

You can count on having to change your flywheel at around 100,000 miles depending on your car’s make and model. With that said, DMFs can fail much sooner than that if you’re not careful. As a matter of fact, you can take a 2019 manual car and abuse it to a point where you’ll cause DMF failure in less than a year.

How much does it cost to replace a dual mass flywheel?

Dual mass flywheels are very expensive to replace. The list price for the flywheel alone is typically $800 to $1100. Add in a couple hundred bucks for a new clutch and clutch disk, plus labor to replace all the parts and you end up with a sizable repair bill.

Do you have to change the dual mass flywheel with clutch?

REPAIR OPTIONS 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.

What’s the difference between dual mass and single mass flywheel?

As the name implies, a single or solid mass flywheel is made out of a single, heavy cast piece of steel or metal, has no moving pieces, and provides a direct contact between the clutch assembly and the engine. Dual mass flywheels consist of two flywheels, one attached to the crankshaft and the other to the clutch.

Can a dual mass flywheel be replaced?

An OE-spec replacement dual mass flywheel will restore the vehicle’s stock performance and feel. The downside, of course, is the cost, as replacement DMFs are generally much more expensive that single mass flywheel conversion kits (if a conversion kit is available, of course).

What does a BMW flywheel do?

Our 25th Year! A BMW’s flywheels is a critical driveline part, storing rotational energy and allowing it to be maintained during the shifting process. Because of its rotating mass, a reduction in flywheel weight will allow your engine to rev more eagerly.

When did the BMW flywheel come out with a manual transmission?

Original BMW Flywheel for 1987 and later M20 engines with a manual transmission. OEM replacement for the stock flywheel. Replaces BMW part #21207542984. Up to 1/2009 production date.

What are the benefits of a lightweight flywheel?

Because of its rotating mass, a reduction in flywheel weight will allow your engine to rev more eagerly. Get quicker throttle response for better acceleration and easy rev-matching with one of our premium BMW lightweight flywheel and aluminum flywheel options.