Thought I had better crack on with sorting out the leaky steel T pipe that the heater hoses go onto. The problem being several corrosion orientated pinprick holes in the steel pipe. I tried to fix with a bit of chemical metal but it didn't sort it out totally. The L2B saw the temp guage climb about halfway between the upper reading of normal and the red. It was hot though and traffic was solid at times on the way to the meeting point.
So, I have used a copper T piece, kindly made up by Nutter81, however, the outer bore of the copper pipe is just a fraction too wide and it was a struggle to get the rubber hose onto the pipe. It is all secure for now, and I don't supppose that it'll be a problem. I might however have a couple of pipes made up in stainless so it would be a 'fit and forget' scenario. I have the old piece so it shouldn't be too much hassle. There might even be a opportunity to provide the same to people in similar circumstances perhaps?
Everything went well with regards to removal of the old T piece (apart from one rusty jubilee clip) and fitting of the new T piece. The bottom hose needs to be replaced with the genuine article as the hose I have used appears to be insufficiently reinforced and is kinking slightly. Not a huge problem.
Anyone know of a stainless fabricator who might be able to help?