I lost my first head when a hose split and dumped the contents, all sorted new hoses and new head. Since then I have had three strange over heating incidents, last one fatal (another head).
My local LR man seem the business but can not find the cause of my three incidents. It has been back to him a few times, had it a week once but nothing showed up and he drove it every day.
He has flushed the cooling system several times and put some stuff in to clean the system out, again several times. He put on a new thermostat and re checked every hose for leeks, none.
There seems to be talk of some type type of air lock causing the problem. I did get a gurgling noise at the drivers foot well which I now guess is air gurgling around. On two ocasions the engine ran a very long time, once to wales and once to the lake district with not heat issue showing. Next morning after checking water level the engine overheated withing minutes of starting. Strange also that headting did not work just prior to the overheating.
After each incident I let the engine cool down, took off the expansion tank cap (was under preasure) and filled with water. After that the engine ran fine again, back from wales and lake district.
Last incident same thing, all the way to wales fine and next day over heated first thing in the morning except this time total death and time for a new head.
So, what is going on? As stated my LR guy is very good with 30 years of pure LR experiance and he has ripped the carp out of the thing and says can find not one thing wrong.
I need some fresh ideas because I can not afford to keep being recovered from all over the UK and heads are very expensive every 6mo.