Sudden clutch pedal vibration and rattle noise?

Andydote · 17th August 2013, 10:49

Morning all.

Just been to the shops and as I was waiting at a junction, clutch down, there was a sudden rattle/knocking sound and heavy vibration in the pedal.

I still was able to pull off normally and the noise stopped. A few mins later it happened again.

Any ideas?

Mike Noc · 17th August 2013, 12:04

Hate to say it Andy but thrust release bearing? It is built into the slave cylinder.

Andydote · 17th August 2013, 12:21

andy willi · 17th August 2013, 15:05

dmf on its way out dose it rattle on tickover with clutch up

andy

VMax1000 · 17th August 2013, 15:16

Doesn't the release bearing noise normally disappear when you press the pedal as the bearing at that point presses firmly against the diaphram springs?

Release bearing normally rattles in neutral with foot off the clutch.

Wouldn't rule it out but it might be some diaphram spring fingers are damaged

Andydote · 17th August 2013, 21:29

I'll explain exactly what happened:

All was fine, until I was waiting at a junction with my foot down on the clutch and first gear selected. Suddenly, in this exact position, there was a loud vibrating/rattle noise and I could feel it in the clutch peddle. I lifted the peddle and pulled off as normal. The rattle stopped once the clutch was lifted.

Then about 5 minutes later, same position of 1st gear selected and clutch down, it happened again. Once clutch was lifted it stopped.

The rest of the journey home (3 miles) the clutch engaged fine, but the car did seem to lag a little, although the clutch bite was normal..

VMax1000 · 17th August 2013, 22:57

Makes me wonder if the pressure plate (diaphram) lost some spring fingers...

17th August 2013, 10:49	#1
Andydote Gets stuck in ZT CDTI & 220 Turbo Join Date: Mar 2013 Location: Coventry Posts: 880 Thanks: 30 Thanked 119 Times in 67 Posts	Sudden clutch pedal vibration and rattle noise? Morning all. Just been to the shops and as I was waiting at a junction, clutch down, there was a sudden rattle/knocking sound and heavy vibration in the pedal. I still was able to pull off normally and the noise stopped. A few mins later it happened again. Any ideas? __________________ MG ZT CDTI - 325mm Brake Upgrage - Fan Resistor Upgraded - Air Intake Chopped - PCV Filter Done - Intercooler O-Rings done - Strut Mount Bearings Replaced - Black Alcantara Interior Fitted. http://www.the75andztclub.co.uk/foru...23ce063f6c.jpg

17th August 2013, 12:21	#3
Andydote Gets stuck in ZT CDTI & 220 Turbo Join Date: Mar 2013 Location: Coventry Posts: 880 Thanks: 30 Thanked 119 Times in 67 Posts	__________________ MG ZT CDTI - 325mm Brake Upgrage - Fan Resistor Upgraded - Air Intake Chopped - PCV Filter Done - Intercooler O-Rings done - Strut Mount Bearings Replaced - Black Alcantara Interior Fitted. http://www.the75andztclub.co.uk/foru...23ce063f6c.jpg

17th August 2013, 21:29	#6
Andydote Gets stuck in ZT CDTI & 220 Turbo Join Date: Mar 2013 Location: Coventry Posts: 880 Thanks: 30 Thanked 119 Times in 67 Posts	I'll explain exactly what happened: All was fine, until I was waiting at a junction with my foot down on the clutch and first gear selected. Suddenly, in this exact position, there was a loud vibrating/rattle noise and I could feel it in the clutch peddle. I lifted the peddle and pulled off as normal. The rattle stopped once the clutch was lifted. Then about 5 minutes later, same position of 1st gear selected and clutch down, it happened again. Once clutch was lifted it stopped. The rest of the journey home (3 miles) the clutch engaged fine, but the car did seem to lag a little, although the clutch bite was normal.. __________________ MG ZT CDTI - 325mm Brake Upgrage - Fan Resistor Upgraded - Air Intake Chopped - PCV Filter Done - Intercooler O-Rings done - Strut Mount Bearings Replaced - Black Alcantara Interior Fitted. http://www.the75andztclub.co.uk/foru...23ce063f6c.jpg

17th August 2013, 12:04	#2
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,553 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Hate to say it Andy but thrust release bearing? It is built into the slave cylinder.

17th August 2013, 15:05	#4
andy willi I really should get out more....... PRE LAUNCH 75/ZT 190/XJ 550 Join Date: Jan 2007 Location: carcroft doncaster Posts: 2,866 Thanks: 101 Thanked 680 Times in 342 Posts	dmf on its way out dose it rattle on tickover with clutch up andy

17th August 2013, 15:16	#5
VMax1000 Passed Away MG ZT260 Join Date: May 2007 Location: Swindon Posts: 2,805 Thanks: 62 Thanked 325 Times in 249 Posts	Doesn't the release bearing noise normally disappear when you press the pedal as the bearing at that point presses firmly against the diaphram springs? Release bearing normally rattles in neutral with foot off the clutch. Wouldn't rule it out but it might be some diaphram spring fingers are damaged

17th August 2013, 22:57	#7
VMax1000 Passed Away MG ZT260 Join Date: May 2007 Location: Swindon Posts: 2,805 Thanks: 62 Thanked 325 Times in 249 Posts	Makes me wonder if the pressure plate (diaphram) lost some spring fingers...