Clutch not engaging while driving.

[glendog74]

Originally Posted by mark csl

Or it could be telling you stop driving like a Girl

I didn't want to say...!

[bryce]

Originally Posted by SMD

Seems a strange one this! Have you been back to BMW about it Bryce?

Not been back since. It seems I need to source the problem myself and tell them what needs fixed

Originally Posted by mark csl

Has your csl had the relay for the smg changed they were a recall i think all my CSLs have had them changed ?


Or it could be telling you stop driving like a Girl ( not you cslgirl LOL ) AND GIVE IT THE MESSAGE

Dont think the relay has been changed, I'll put it too them tomorrow. Was it to stop the above symtoms?

And yes, she gets the message once she's warmed up!

[Rags]

Why did you have m5 wheels on the rear?

[bryce]

Originally Posted by Rags

Why did you have m5 wheels on the rear?

Just for a laugh

Anyone got any idea?

[NZ_M3]

I don't think it's the relay - that relay controls the accumulator on the pump (i.e. that pump noise you hear when you first open the door) - it controls charging the system when it drops below a pre-determined PSI.

So it only does it in a down hill situation and not uphill and not when on flat ground? And only with part throttle??

[Bealo]

Originally Posted by SpineOnABap

Interesting. Did you perform the SMG -> tyre recalibration? Like you should when you change tyres (see the handbook section on changing tyres).
If you don't it can throw the SMG into a bit of a wobbly.

It's what's often referred to as the 'SMG reset' (car into N or 0 at 40mph, pull & hold both paddles for about 4 or 5 seconds then back into gear).

I never knew that, I never did the SMG reset when i changed from 265 rears to 275 rears.

I'm about to put some cups on my car so i will do the reset just to be on the safe side.

hope you find out what the problem is soon bryce.

[mattbedford]

How do you get it into neutral at 40mph?

[glendog74]

Originally Posted by mattbedford

How do you get it into neutral at 40mph?

Push the gear selector 'stick' to the left

[bryce]

Originally Posted by NZ_M3

So it only does it in a down hill situation and not uphill and not when on flat ground? And only with part throttle??

Ermm, downhill mostly I think (Its one of them things though, hard to repeat when trying!) And yes, only on part throttle.

I have noticed if I downshift, (4th - 3rd) there's a delay before the clutch comes back in. Its as if its missed the gear. This is when free wheeling and not braking.

Doing my nut in

[NZ_M3]

Originally Posted by bryce

I have noticed if I downshift, (4th - 3rd) there's a delay before the clutch comes back in. Its as if its missed the gear. This is when free wheeling and not braking.

I had exactly this in my car before - except it was almost all gears, worse on the lower gear downshifts.

It turned out to be a faulty release bearing.

Our release bearing sits on a plastic sleeve on the input shaft - the design of the clutch slave cylinder and fork is such that it pushes only on one side of the fork - overtime the inner edges of the release bearing and the plastic sleeve gets worn out inconsistently left to right - causing it to catch on release. There's an aftermarket sleeve that you can buy that's made of an alloy of some sort that prevents this from happening.

I am suspecting that you might have what I had happen with my release bearing - completely worn on one side and almost non on the other, causing it to intermittently catch on release - i.e. the delay you feel on downshifts and sometimes upshift.

Lucky for me it was warranty work - free clutch kit and labour!!


Of course your situation might not be the same as mine - it could be a purely gearbox issue - the sensors might be sensing that it's hard to engage gear, thus dropping the clutch and putting it back into neutral before trying again - this happens when the synchronmesh is worn out or about to wear out. It should however register in the DME that it's had trouble engaging gears though.

Might pay to flush out that gearbox fluid and put in some new fluids and see if it helps - might even be a low fluid situation, who knows?