28-11-2021, 10:24 AM
If you have (had) water in the sump then more than likely the head gasket has failed and the cylinder head may well be warped. If it has been running in that state for any length of time the crank bearings will have suffered. Before doing much else I would check the ignition timing as over-advance is perhaps the easiest way to make an A7 engine noisy. If running straight oil in your engine make sure it gets a warm-up before setting off, especially at this time of year.