Since my last post I have been away. I have now changed the seals on the expansion tank cap and I have drained the coolant and refilled it very carefully, also refitted the oil cooler pipes. Last Friday drove about 75 miles on checking the level the following morning it was ok so I thought I had cracked it, alas that was not to be. On Sunday drove 35miles and when I checked the level this morning it needed about 400mls to bring it up to the correct level. It looks like HGF. Any other suggestions or tests I should run to confirm?
Martin
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