Leaking expansion tank.

[scrumpyone]

Steve,
I think OMR meant he's cracked it, as in solved it.

[steve bain]

Ah.

[mark1gls]

And the answer is......................??

[scrumpyone]

C'mon Sandy don't keep us in suspense

[Old Mac Rocco]

One shopping round trip of 9 -10 miles @ 0 - 30mph = No water leakage
One round trip on M8 of about 40 miles @ 0 - 70mph = one miniscule drop of water at cap
Very Happy Bunny.
Next on the list is a little PTFE tape on the bottle and a new return hose from the radiator to the expansion tank.
I am happy that the water loss has been stopped but I think a new hose should be fitted as the one on just now is probably past it's sell buy date.
I'll do the tape first and then the hose to see if either completely eliminates the problem but as I said earlier I'm one Very Happy Bunny.
Thanks to all who assisted, your input was welcome and very much appreciated.
Now just got to get a date for my trip to Leeds sorted.

[big_wig_074]

get some electrical tape on the threads on the bottle, then screw it on, had a similar issue on mine, all sorted now.

[steve bain]

get some electrical tape on the threads on the bottle, then screw it on, had a similar issue on mine, all sorted now.

You would be better off using ptfe tape. It's squishy and makes its own seal. Good enough for plumbing and compressed air, should do the job

[Old Mac Rocco]

Hi Steve,
That was the plan for today but a boiler repair, a new blind and a broken window handle all got in the way.
Who says you'll have all the time in the world to play with your car when you retire
Hopefully get it PTFE'd today and pick up some new hose on Friday.
If it all works out I'll flush and re-fill over the weekend as I have no idea what the mixture in her is like.

[mark1gls]

I've been using this stuff and it's ready mixed, 5L is plenty.
£5.99 with "PAYDAY25" discount code.

http://www.eurocarparts.com/ecp/p/car-a ... &0&cc5_865

You can buy concentrate if you wish.

[Old Mac Rocco]

Today one round trip on the M8 of about 40 miles @ 0 - 70mph = no water at cap
Still going for replacement hose from the radiator to the expansion tank.
Collected http://www.eurocarparts.com/ecp/p/car-a ... &0&cc5_865 as advised by Mark1gls, now on the search locally for hose which is about 8mm i/d and about 14mm o/d.

[steve bain]

I noticed today on my black hose it says 'heater' . I've used that clear tubing with reinforcing stuff in it from b&q before.

[james butler]

typical ive just noticed the water flange on the front of the head on my rocco has started weeping.
and the sump gasket is weeping again old problem rearing its head
funny how these problems manifest themselves in the winter when its dark and cold and usually wet!

[big_wig_074]

get some electrical tape on the threads on the bottle, then screw it on, had a similar issue on mine, all sorted now.

You would be better off using ptfe tape. It's squishy and makes its own seal. Good enough for plumbing and compressed air, should do the job

I prefer electrical tape, its thicker and easier to manage. its in my tool kit too! but its not an argument, both will work, electrical tape stays on through multiple removals of the cap.