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[ians]

that's the kind of thing I was thinking about - but not sure if the AC should be on or off.   Worth some experimenting before cutting the pipes..

[Marks DTM Calib]

If you pop the inlet setup out, you will be able to get to the main coolant pipes at the back.

Disconnect the main pipes which are part of the heater bypass assembly where they attach to

1) The coolant bridge between the heads

2) The maain coolant transfer pipe at the rear of the block.

Then fit a short length of hose to join the two connections back up again.

Either that or clamp the two pipes where they pass through the bulk head.

[matt]

Thanks for the hints...  I am becoming baffled with this ...

The scuttle drain was blocked - now dripping happily on nearside wheel    Bonnet now opens and is adjusted.  Haven't solved original problem.

There's now a slow but steady drip drip of coolant from approx front of gearbox, driver side  (near the downpipe on the drivers side)

everything in the engine bay appears fine - and very *DRY*... except:

The bottom hose from the bulkhead runs to a T piece - the top of the T is kinked over and then runs to the bottom of two connections on the right side of the HBV.  It's certainly enough to restrict flow heavily - maybe enough to nearly stop it.  Dunno if that's the cause, or caused a pipe to pop off inside cabin due to pressure.

All of this & HBV are bone dry.  This is 80% by touch - access is not the best.  

The two connectors that run forward from the HBV are the two I need to link, yes?

Think it's put off til morning anyway as I have no torx sockets to take plenum off - didn't bother to look before going to halfords for hose and torx bits (separate trips of course!!!)  

Oh well I learnt plenty.  Hols postponed til tomorrow