[Transmission] 1.6hdi clutch judder

[smutts]

New old stock genuine peugeot clutch, 
3 new engine mounts, 
wishbone mounts good, 
different engine, 

and.....................
                          ...................still exactly the same judder when moving off in 1st or reverse.

The flywheel though was the old one, so my "it looks fine" probably wasn't

Or is it a case of ................. "They all do that Sir!"

Presently picking black goo off of my fingers after stuffing the "overrun" side slot of the rear torque mount with tyre string.

I will let you all know how well that worked once the rubber cement has set.

[Sol]

I've decided mine is the actual clutch causing  the juddering. If I let it in a bit hard with too many revs and slip it a bit first then dump it, it doesn't judder for days, then eventually it will do it again.

Rear crank seal weep maybe?

[munkey]

Mine started doing that at around 40k miles (I posted a similar thread a few years ago) - although I never worked out what caused it. In the end I just slipped the clutch slowly at higher revs (RIP clutch) to avoid the juddering when pulling away like what Zion said and now the van is on 120k, original clutch, and it's almost stopped doing it all together

[smutts]

Elsewhere I have been faffing about with a dying injector.
Injector sorted and the judder is 80% better.
It's probably been croaking for while.

[Sol]

Mine will be fine for a couple of days then be really bad for a whole day, then ok again. Drives me nuts.

[smutts]

My theory is..................

The engine mounts are shared with several engines.
Therefore the choice was down to cost.

It's a bit like an old watch, the balance wheel which is a combination of metal & distance (engine) vs hairspring (rubber engine mounts) gives the frequency of the tic toc (judder).

Unfortunately the usual pull away rpm sits bang in this frequency. Not good.
So a slight problem, snaggy clutch, weak injector, weak cylinder, will shake the thing to bits.
Same reason as some old suspension bridges had signs with "Soldiers, Break Step!"

So to change the resonant frequency, either softer or harder engine mounts (tyre string glued into mount gaps), extra weight around the perimeter of the engine bellhousing (lead flashing & araldite?), or a damper (old Citroen 2CV tuned mass wheel damper, got one, but it's just too big & my dad wants it back.)

Or, set fire to the wretched thing & buy something else.

[Sol]

Others have tried poly bushes and it still judders. It's only as the full biting point is reached.

If it was the engine mounts, then slowing to almost stalling speed then accelerating again, without declutching, would cause the engine to judder, but it doesn't and it smooth as silk in that situation.

Only clutch engagement does it.

[jj9]

Has anyone with a juddery clutch tried replacing the fluid ?


.

[Sol]

I haven't mate, I will say it's not always doing it. And it's just at the last bit of bite before it fully takes up, it judders like a bugger sometimes, yet it can be non existent for days at a time. Oddly when the wife drives it, she never gets the judder.

Could be worth a shot though. This is my second B9 and both did it, even after a new clutch on the old van. The M59s never did it once.

[smutts]

Well, it was just a theory.