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Thanks for that disco. I am up to about 5 days now without any tapping :) When everything went back together I was careful to tension the belts. I have done it quite a few times since owning the car. I still remember the change after I first tensioned the belts. The car went from struggling to get t...

I did a little work on the car today. Checked the engine oil level - normal Checked the coolant level - normal Checked the foam under the oil filler cap and realised that it looked worse than it actually was. It was a very thin layer only on the centre of the cap. I retentioned the drivers side cyli...

Thanks for the replies!
I will update this again after having a look this weekend

Thanks for the replies!! Given me some things to check this weekend :) Are you losing coolant? Not so far, the coolant level seems fine. Have not needed to add anything to the overflow tank. Before the head swap I was loosing coolant and there was always a gurgling noise from under the dash. Since t...

The story so far ... After 1 year of owning my 1991 L series the tapping started. Nothing unusual there and it's been described over and over in the forums. I also noticed that I was getting white grey foam inside the oil filler cap. So I was getting water in with my oil - most probably head gasket ...