Clutch delay valve.: Motoring Motoring Discussion forum

Motoring Discussion > Clutch delay valve.	Miscellaneous
Thread Author: Old Navy	Replies: 5

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New Fri 22 Jul 16 18:07

Clutch delay valve. - Old Navy

A new one for me. While rummaging around new car info I came across this device. It might help to protect a DMF and assist learners with clutch control.

en.m.wikipedia.org/wiki/Clutch_delay_valve

Last edited by: Old Sundodger on Fri 22 Jul 16 at 18:08

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New Fri 22 Jul 16 20:04

Clutch delay valve. - Armel Coussine

Sounds a useful device. But another encouragement to lazy sloppy driving. Ideal though for a person with weak or jittery ankles.

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New Fri 22 Jul 16 20:20

Clutch delay valve. - Slidingpillar

And if you read this;
www.zeckhausen.com/catalog/index.php?cPath=6562
less than useful!

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New Fri 22 Jul 16 20:41

Clutch delay valve. - Old Navy

I have only seen CDVs refered to for American spec cars, there is a query on another forum asking if a UK spec car has one fitted.

Last edited by: Old Sundodger on Fri 22 Jul 16 at 20:43

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New Sun 24 Jul 16 08:09

Clutch delay valve. - Cliff Pope

It sounds like a recipe for rapid clutch wear to me. The secret of long clutch life is to pull away at idling speed before accelerating, and on the move to match engine and gearbox speeds so that with no slippage clutch engagement can be as fast as you like.

This device seems in effect to simulate the action of a torque converter, but on a plate clutch that will burn out if you treat it like that.

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New Mon 15 Aug 16 13:15

Clutch delay valve. - DP

BMW has been fitting these as standard to many manual models for some years now. In my experience, these valves rob all "feel" from the clutch pedal, and make achieving a smooth gear change a complete lottery even after 3 years and 60,000 miles of familiarity.

A common aftermarket mod is to either change the valve for one with modified ports to give more direct operation, or to remove and bin the thing altogether.

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