Originally Posted by MATTMOG
Peter I had the same problem, a puddle on the floor and drops at the bottom of the radiator.
First thought was the hose which was also wet.
But my experience of 45 years as a plumber has taught me to always start looking at the highest point.
And there it was!
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The O-ring at the nipple to de expansion tank.
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Couldn't see that without removing the cowl.
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Here you can see how I fixed it.
http://www.talkmorgan.com/ubbthreads.php/topics/726299/re-radiator-leaking#Post726299

I finally got back to this issue today.
When I made my original post I had looked at the header/overflow tank and the fluid level seemed to be at a minimum. It seems I did not look well enough because, as I discovered a few days later, it was almost empty. Accordingly I ordered 5 litres of red, ready to use, fluid and that arrived this morning. I put a little over a litre in the tank, more than was actually necessary, and ran the motor until the temperature gauge started to shift, ie warm but not hot, I then put the car back in the garage and had a good look at the point indicated by Paul and, guess what, even after about 10 minutes and not reaching running temperature and pressure, the area around the spigot was wet and the moisture was starting to wet the side of the radiator top tank.

The next step will to be to get it up to full running temperature and check again. I have to do this without taking the car on the road as it has the insurance suspended at the moment: the Italian equivalent of SORN wink

Obviously it is going to be a bit of work to remove the bonnets and radiator cowl to get at the spigot but that is work I can do myself and if replacing the 'O' ring resolves the problem I will be able to save the trouble and expense of a new radiator for the moment.

Thanks to Paul for his suggestion on this.

Peter

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