The sound is coming from the bellhousing which points to the clutch or flywheel so I would be pulling the gearbox off and starting my investigation there. I know what a pig of a job it is (I've had the gearbox off a few times on my Dolomite 1300 and it was bad enough on the non-OD box). It sounds like something's rubbing so there should be some tell tale evidence once you have it all apart. The alternative would be to see if everything beds in once you can start using the car on the road. It would be better to start your investigations while you have the tunnel off. I'm wondering if the clutch plate or release bearing have been fitted the wrong way round. I once fitted a release bearing the wrong way round on an Acclaim which made the clutch heavy. Have you tried to drive the car at all rather than just running the engine with the car stationary?
Edit: Just been going through this thread and I'm wondering if the flywheel is rubbing on the engine backplate bolts or if the engine backplate bolts haven't been fully tightened up. With the gearbox off, you should be able to check for clearance. With it all apart there will be some wear marks if this is indeed the cause of your problem.
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Toledo Man
West Yorkshire Area Organiser & forum moderator
Meetings take place on the first Wednesday of the month at 8.00pm at The Old Brickworks, Wakefield Road, Drighlington, Bradford, BD11 1EA
1972 Dolomite 1850 auto (NYE 751L - Now for sale)
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - another project car)
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