Clutch high biting point ?? V8 Vantage

[Stuelord]

I own a 2007 v8 vantage manual and I also had a very high bite point on my clutch that didn't seem right as others have said.

Today I had replaced the clutch, flywheel and pressure plate and thrust bearings, now the car feels totally new.

The bite point is no perfectly placed, right at the bottom of the stroke.

The car feels fantastic and the main reason was the pressure plate had little to no rebound left in it.

So happy with the new clutch kit.

Edited by Stuelord on Thursday 24th July 14:07

[Stuelord]

I own a 2007 v8 vantage manual and I also had a very high bite point on my clutch that didn't seem right as others have said.

Today I had replaced the clutch, flywheel and pressure plate and thrust bearings, now the car feels totally new.

The bite point is no perfectly placed, right at the bottom of the stroke.

The car feels fantastic and the main reason was the pressure plate had little to no rebound left in it.

So happy with the new clutch kit.

Edited by Stuelord on Sunday 27th July 08:52

[john ryan]

There is an explanation for manual clutches, though of course individual car tolerances may affect the pedal position at which bite occurs for a driven plate of the same thickness. As the driven plate wears it gets thinner - as a result the pressure plate is closer to the flywheel, so that the diaphragm spring becomes more conical. Effectively the contact point of the spring approches the release bearing, so less release bearing travel is required for clutch release - hence a high pedal indicating a worn driven plate (unless an automatic adjuster is included). Also the diaphragm spring characteristic is not linear, so as it becomes more conical the clamping force may tend to reduce (according to the original bite point). This is not a good thing because lower clamp pressure is combined with a thin driven plate with less heat capacity, and hence more liklihood of becoming even thinner - so failure may be quite quick once the degredation starts. Compensation mechanisms in DCT and automated manual transmissions may mask this effect, until failure is sudden and terminal

[mikey k]

john ryan said:

There is an explanation for manual clutches, though of course individual car tolerances may affect the pedal position at which bite occurs for a driven plate of the same thickness. As the driven plate wears it gets thinner - as a result the pressure plate is closer to the flywheel, so that the diaphragm spring becomes more conical. Effectively the contact point of the spring approches the release bearing, so less release bearing travel is required for clutch release - hence a high pedal indicating a worn driven plate (unless an automatic adjuster is included). Also the diaphragm spring characteristic is not linear, so as it becomes more conical the clamping force may tend to reduce (according to the original bite point). This is not a good thing because lower clamp pressure is combined with a thin driven plate with less heat capacity, and hence more liklihood of becoming even thinner - so failure may be quite quick once the degredation starts. Compensation mechanisms in DCT and automated manual transmissions may mask this effect, until failure is sudden and terminal

good explanation!