Vibration after clutch change

[willwal98]

dry bearing, sometimes squeeling (dull) type noise. Not really that much to worry about unless it gets really bad. If it seizes or falls apart you would be in trouble though.

[willwal98]

I did notice there were two small metal tabs welded on the pressure plate almost as if 2 bolt holes had been welded up. They were spot welded on, about 2cm x 1cm x 3mm and were painted the same as everything else (no colour variation from what I could see).

Any chance the factory could have done this to change the bolt pattern and thought the small tabs would not make a difference?

[purple5ive]

thanks fellas it just makes a noise but loud enuf to be noticed i just put in a second hand gearbox and all this stuff came with it i only installed a new clutch itself but the master and slave etc were second hand so must have been dodgy loll

[LeeRoy]

thanks fellas it just makes a noise but loud enuf to be noticed i just put in a second hand gearbox and all this stuff came with it i only installed a new clutch itself but the master and slave etc were second hand so must have been dodgy loll

Since you were doing a new clutch you should have changed the throwout bearing (which is the one making the noise in this case). I find it's alot easier to just change the whole lot when its out than risk having to throw another 10 hours in pulling it out and putting it back together. Your problem doesnt lie in the salve cylinder or master cylinder.

Its the bearing that sits on the end of the clutch fork and presses against the back of the pressure plate.

[rxbenny]

Take the flywheel and pressure plate to have them balanced together.
If you only balance one and the other is at fault it will be an annoying exercise to pull it apart again.

[TRAV-KE55]

Just a quick thought, did you have the flywheel off?? If so there is a chance that you have a foreign object on the flange which will make the flywheel not bolt up true.
Trav

[willwal98]

yes I had the flywheel off but I made sure it was clean when I put it back but good thought anyway.

It's going to be a PITA to get the flywheel off, damn locktight. It's not that much. What will happen if I ignore it?

[LeeRoy]

yes I had the flywheel off but I made sure it was clean when I put it back but good thought anyway.

It's going to be a PITA to get the flywheel off, damn locktight. It's not that much. What will happen if I ignore it?

Clutch will wear out sooner than it should. You will get the shits with the vibration. Possibly wear engine mounts out sooner. Could also put some extra strain on the bottom end. hmm thats about all i can think of atm.

- LeeRoy

[Toobs]

You say the flywheel / pressure plate was balanced and machined prior to fitment... are you sure it was put back together the same way that it was balanced?
Most machine shops will mark the flywheel and pressure plate / cover with something (e.g. a line of white paint down one side) to show which way the clutch was assembled.

[willwal98]

ah no, the flywheel was machined while it was out but not balanced and the pressure plate was fitted straight from the factory but I was told they should be factory balanced anyways

[rxbenny]

willwall98 you should take it apart again and at least iinspect it if you have strange vibrations.
if you it is out of balance you will be putting increased load on the crank bearings.

just think when you have bed sheets in the washing machine spin drying with the washing machine moving all over the place.

[o_man_ra23]

just think when you have bed sheets in the washing machine spin drying with the washing machine moving all over the place.

I just ignore that...

But your right about the bearings, youll flog them out quite quickly with vibration... there is also a good chance of cracking a ring, or fracturing a con rod. Vibrations are a bigger killer than you might think.

Cheers, Owen

[LeeRoy]

Vibrations are a bigger killer than you might think.

Isn't that also the reason why harmonic balancers contain rubber to reduce the vibrations sent back into the crank and to reduce speed fluctuations and so forth being transferred onto the water pump alternator and so on.

- LeeRoy

[o_man_ra23]

Isn't that also the reason why harmonic balancers contain rubber to reduce the vibrations sent back into the crank and to reduce speed fluctuations and so forth being transferred onto the water pump alternator and so on.

- LeeRoy

This is true, but if you have a look at some of the 18R motors, you will see that they didnt have a harmonic balancer, yet they dont suffer vibrations. Probably to do with the factory balancing.

Cheers, Owen

[LeeRoy]

This is true, but if you have a look at some of the 18R motors, you will see that they didnt have a harmonic balancer, yet they dont suffer vibrations. Probably to do with the factory balancing.

Cheers, Owen

Yeh i've noticed some other pulleys don't have the rubber either.