I've had to give up for now. File this under major delay……..
Basically the way my vacuum pipes are wired, something has been changed as a bodge job. I need to trace the pipe back that disappears in the passenger / nearside front wing. Its number 2, and leads to the vacuum reservoir. Its suspiciously floppy and I suspect its not connected. The pipes are old and perishing and there's no sense in not changing them. In fact, I suspect there is a problem with the vacuum supply take off coming from the plenum too. Not a major problem, just a connection needing made. From looking, I replaced this with a red silicon hose a couple of days back. To trace what I disconnected it from is not as easy, but looking at P7 of my thread, and this link in particular, it appears it was not connected. I thought I'd made a mistake documenting things:
viewtopic.php?f=79&t=20848&start=120#p272859The red pipe I attached was 4mm diameter; so I will change this over for a 3mm one I would guess.
It is possible there is no vacuum reservoir in place or it leaks. To be honest I can't remember what the heater problem was. What I posted when I bought the car was:
the heater seems to work fine but air does not get through to the cockpit side and centre vents. Its not very strong from the demister vents either. Air from the footwells is good and strong.
To both remove and fix the blower unit, and check the reservoir, I need the arch liner off. To get the liner off, I will need to do as you say and drill the bolts off (I have the new fixing kit from BFG. But to do that I either need to turn the wheels as you say, or remove them entirely. Neither is possible on the hydraulic lifts.
I think I am going to have to lower the lift and wheel assembly onto 3 axle stands - one placed as per the manual and two as additional safety nets at the jacking point (hard to access with the lift in place), and under the wishbone with a pad as a safety-net/non-supporting stand just to stop the wishbone dropping too far.
If I loosen the wheel bolts before I do this, I can then pull the wheel, drill out the liner and then put the lift back up under the wheel.
I have a week's wait before my gaskets & new manifold nuts arrive - and I need a special tool to free the electrical connections from their terminals and check each one - so I can't work on much else, but there will surely be bits and pieces. This is a good days' work though, and will put me back considerably.
Thanks for your help, I'll sleep on it….I think I know how to deal with it.