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my BWM overheated and then it was low on compression on cylinders 6,5,4 and 3. so i have got the head off, got it skimmed and where the head bolts go the threaded holes are full of water and some oil but its just the top bolts. should this be like this ?
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When you lifted the head off the oil and water galleries will have emptied their contents onto the top of the block and into the stud holes.
Just make sure you clean them out because if you put a bolt in on to of the fluid you will cause a hydraulic effect which at best will give false torque readings and at worst could crack metalwork.
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Blow out the holes with an airline and chase the threads clean. Ideally have the head pressure tested (its usually pretty cheap) before you refit it.
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