Checking dual mass flywheel.

[zedhed]

Well folks whipped the gearbox out today to do clutch but oddly enough the clutch is not worn down to rivets or anything and slave was not leaking.dmf looks a bit scorched so how do I test this on the zt turbo petrol.

[simondhopkins]

See if there is any play in the wheel. less than 1.6mm is fine, im sure one of the T4 guys will give the correct tolerance.

[chris75]

If you want to be very precise , have a look at this . It's interesting anyway

https://uk.video.search.yahoo.com/se...e7&action=view

I have read before that up to some 30 mm rotational movement at the perimeter of the flywheel is acceptable on our cars Possibly that equates to about the 14 deg measured on the video ; you'd need to measure the diameter of the centre mass and convert deg to mm

[zedhed]

Just been out again and had a look.i can rotate it freely up to about an inch until it takes up spring pressure which then its probably barely 2mm there abouts.so am i on the right track.

[marinabrian]

The thickness of the friction material of the driven plate is 6.9 to 7.4mm when new and the service limit is 5.9mm.

Onto the flywheel, ideally there should be no more than 16mm relative radial movement between the two masses, and no discernible axial movement at all.

Blueing or heat generated discolouration, is quite normal on a flywheel face that has been subject to a slipping clutch, and can be removed using emery cloth or wet and dry paper provided there are no high spots these are normally fit for further service once cleaned.up.

It should be remembered that the relatively low torque figures produced by the 1800T are much more forgiving to the flywheel than the diesels, and generally speaking should be ok

Brian

[zedhed]

Originally Posted by marinabrian

The thickness of the friction material of the driven plate is 6.9 to 7.4mm when new and the service limit is 5.9mm.

Onto the flywheel, ideally there should be no more than 16mm relative radial movement between the two masses, and no discernible axial movement at all.

Blueing or heat generated discolouration, is quite normal on a flywheel face that has been subject to a slipping clutch, and can be removed using emery cloth or wet and dry paper provided there are no high spots these are normally fit for further service once cleaned.up.

It should be remembered that the relatively low torque figures produced by the 1800T are much more forgiving to the flywheel than the diesels, and generally speaking should be ok

Brian

Thanks Brian,your just like a human encyclapidiaJust full of info,useful at that.Well my driven plate now is about 3mm thick on each side,so does need changing then.