Hi All.


I purchased a 2006 X-Type 2.2d SE with 147 000km on the clock a week ago, my first Jag after a 30 year long love affair, and as Murphy's Law would have it, two days later a noise developed.


With the clutch pedal depressed, there is no noise. But with the clutch engaged in neutral, there is a rattling noise between idling speed and about 1100 RPM that is reminiscent of a late 1990's Isuzu direct injection diesel, in other words very noisy! Above about 1100RPM in neutral the noise disappears, not gradually but stops instantly as the revs climb, and vice versa.


My research on this site and others suggests that it's probably the Dual Mass Flywheel on it's way out. Can anyone confirm this?

 

How does the vehicle react whilst engaging the clutch? Does it judder, or is the uptake smooth?

 

NBCat, the clutch uptake is perfectly smooth on pull away and through the gears.

 

That does sound like a worn flywheel , when you depress the clutch it loads up the two flywheel halves and the rattle generally disappears .

The clutch will still work fine , but the noise will get louder .

Cheers ,

Sid

 

Sorry, depressing the clutch releases the driven plate from being pressed against the flywheel by the pressure plate.

In my experience, when a DMF fails, it usually is due to clutch slipping, towing or other vibrational/torsional stress being placed on the clutch components. It usually begins with judder when starting from a stop.

 

NBCat , what you are saying is correct , however the action of the release bearing coming into contact with the pressure plate diaphragm is enough to load the outer halve of the flywheel , hence the rattle sound disappears .

 

Interesting, as that has not been my experience with the DMFs that were failing.

There are really two choices for renewing the clutch: install a new dual-mass flywheel, or install a single-mass flywheel with a suitable driven plate having diaphragm springs.

 

Thanks for your input, Gentlemen. Sounds like the 'box has to come out then, before more damage is done. Presents a good opportunity to replace the rear crankshaft oil seal too.


Regards, Bruce

 

Can you record the sound it makes? It might just be that the belt tensioner is on its way out. They too make a very loud rattle on idle.

 

Surely belt tensioner noise wouldn't be influenced by the clutch. The noise disappears when the clutch is disengaged.

 

When the DMF is failing if you just depress the clutch a little the rattle would be evident. You do not normally get the rattle at idle. When fully depressed you would feel a pulsing through the peddle. A rattle at isle would either be the tensioner or the Alternator pulley.

Roger