Clutch shudder

[CHC (RIP)]

Do they know the flywheel is held on by the \'FB\' nut.....54mm? Or will they reface from under the car? To remove the flywheel is a real pain unless you\'re used to doing it. (I\'ve only removed one.....finally used a series of chain drillings to split the nut).

So the vehicle model is based upon the size of its\' nut....... hmmm :3Confused.  Wonder what the size is for the \'FC\' model?  Perhaps the bigger the engine size the bigger the nut or could it be the bigger the nut driving?  Have to think about that one.
Anyhow, had no experience of removing flywheels so cannot comment other than soundz like a job for the experienced/competent person and idiots like me who prefer to do the job so can tell others not to bother or the easy way to do it is.......
Cliff

[JBerg]

its 54mm on FDs and RX8s too. I\'m pretty sure its the standard for all rotaries. Resurfacing the flywheel would require it off the car...it needs re balancing as well if your having any machine work done to it.

[David Nock (RIP)]

When I worked as a Shift Engineer in Pilks Glassworks, St Helens, some 40 mumblemumble years ago, one machine had the \'FB\' nut on top of the main ram. It was an American Lynch Corporation Glass Press, (come over to England on lend lease I\'d say!). So all the fitters would say \'not the FB nut to loosen again!; fetch the six foot Stillsons and three more men lad\'. (For a lad indeed I was.....once).
Same sentiment with the rotary engine Flywheel nut.

Most cars (Pre dual mass flywheels) used to have a ring of bolts which could be undone fairly easily and the flywheel then came away from its crankshaft mounting. Not the rotary, it\'s a taper fit flywheel on the end of the eccentric shaft with the single aforementioned \'FB\' nut. Bloodxy murder it is, that\'s with the engine out of the car.

[A7RXY]

Thanks boys now you are getting me worried ...................

[Ian65]

Dibs,
how certain are you of this diagnosis?
Obviously, I haven\'t seen your car and I don\'t know exactly what the symptoms are but I can say that in 22 years of thrashing the b******S off these things, I\'ve never bent a flywheel.
It seems like a lot of money to spend for what may only be a clutch plate.
May be worth getting a 2nd opinion from somewhere knowledgable about 1st gens like WGT before you commit yourself.

[A7RXY]

Ian, I\'m buying the clutch from the guy on ebay as it is only £47, I think its because it had not been used for such a long time that the clutch is playing, what the guy has said is that untill they take the gearbox out they will not know what the problem is. It started to play up on the way back from Brooklands, its ok when you start off but as soon as its warmed up it shudders when pulling away from rest. the price he quoted was for fitting the new clutch and if the flywheel need refacing that would be included. I\'m not in the position to remove the box myself, and £350 did not seen to bad a price.
   This is the company and they appear to know what they are doing.
www.specialisedengines.co.uk/index.htm

[Ian65]

Check that clutch out carefully before you order it Dibs because that description sounds a bit off to me.
The clutches weren\'t all the same from 1978 to 1988 and they changed from series 1&2 to the series 3.
series 3 clutches were larger (225mm) where as the series 1&2 were 215mm.

I think the centre splines were different as well and if this is the case, the input shaft on your gearbox won\'t fit the smaller clutch.

Check out this thread...

http://mazdarotaryclub.com/forums/showthread.php?t=64716

[A7RXY]

He does say its 215mm in the add, when I go to see him on Sat I\'ll check it out, I\'ll let you know. The only other clutch I\'ve found was over £200 just for the assembly.

[clive]

I know they are a pig to get out if you haven\'t got the proper puller but while the box is out try and replace the spigot bearing as this could be the source of your judder where the first motion shaft isn\'t supported properly due to spigot bearing wear.

[A7RXY]

Thanks Clive I\'ll take that on board.

   Dibs

[clive]

Here you go, this may help

 http://cgi.ebay.co.uk/MAZDA-RX2-RX3-RX4-RX5-RX7-ROTORY-CAPELLA-SAVANNA-CLUTCH-/220636252471?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item335ef20937

[A7RXY]

Thanks Clive, but thats a 215 dia plate, and as I understand it the series 3 uses a 225 dia plate. Here in lies the problem.
 
    Dibs

[Ian65]

I think this is the one you need if you can find a similar one in the UK at the right price...

http://cgi.ebay.com/ebaymotors/1983-1989-Mazda-RX-7-Exedy-Clutch-Kit-/390222093034?cmd=ViewItem&pt=Motors_Car_Truck_Parts_Accessories&hash=item5adb0c9aea


.

[A7RXY]

Thanks Ian,Thats the same make as the one I\'ve found in the Uk, but at £225,
 I\'ll check it again tomorrow as the details are no my office comp.

[A7RXY]

Ian this is the one I found in the UK.  http://cgi.ebay.co.uk/EXEDY-CLUTCH-MAZDA-RX-7-2-3-V210-83-85-/390175566954?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item5ad846ac6a
 
I will email the guy in the USA to ask how much for shipping.
 
  Cheers
 
      Dibs