What are the benefits of the dual-mass flywheel on my Td5 Discovery? Do you know if Land Rover – or even an alternative supplier – has made an assembly that replaces the dual-mass flywheel on the Td5? I know many cars have such an aftermarket equivalent.
Andrew Jones, Peterborough
The normal sprung movement between the components of the standard dual-mass flywheel provides cushioning of the engine pulses to give a smoother, quieter drive with less vibration transmitted to the vehicle. It also provides cushioning when taking up the drive. The springs in the special friction disc supplied with the solid flywheel will provide some cushioning when taking up the drive, but they don’t replace the engine damping characteristics of the dual-mass flywheel.
So, if the solid flywheel was fitted to a Discovery, the increased vibration may well be a problem. The solid flywheel is really intended for specialised uses such as heavy towing that may be needed, say, for commercial applications in a Defender, where the comfort and smooth transmission afforded by the dual-mass flywheel is less important.
Although the solid flywheel is usually installed to cope with special duties, it has no internal parts that can fail so, theoretically, it should be more reliable.
Failure of internal parts in the standard dual-mass flywheel can cause rattling and imbalance, though such failures often go unnoticed until a routine clutch change is needed. In these cases, if the flywheel components have become slightly misaligned, there may be problems when re-entering the gearbox shaft through the clutch assembly.
So, it’s not unknown for a garage to suggest – perfectly legitimately – renewing an apparently serviceable flywheel during a routine clutch change.
Britpart stockists, among others, can supply a heavy-duty, solid flywheel. It’s provided as part of a complete kit that includes a special clutch-release bearing and a friction disc fitted with internal damping springs – unlike the standard Td5 disc, which has no springs.