Hi all and many thanks for your contributions, my air con problem is still not resolved , but i am further ahead from the last post . after having the car on a friends car lift i have found damage to one of pipes coming round the left side of engine, looks like it has been in contact with something and rubbed through . Many thanks to" willskoda", the rear section of air con pipework is open to the elements and prone to fail , but i am sure the previous owner has had those pipes replaced , i nave receipts for work undertaken .
When i can get access to the lift again i will remove said pipes and manufacture or repair or worst case purchase replacements.
i will keep all informed.
Cheers Steve for the diagrams , i have found schematics of front pipework with part numbers etc
Thanks all
youll never be late with a v8
Keith