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T3, I noticed awhile ago that there was a strange rattle coming from my engine compartment at a certain RPM. It quickly grew to an awfully loud hum. I adjusted the idle speed down a bit, but this caused a few other problems. So I tried a couple of times to find the source - tightened all sheet metal screws, looked down inside the fan shroud to see if I had left a nut in there by accident, kicked the spare tire and so on. Nothing. Yesterday, I had enough. Everyone who rode in my Square was also at wits end with it. The sound was creating stress in my life on an unacceptable level. Volkswagens do that to a human sometimes. I drank a large bucket of coffee and had a dip, and then figured that it had to be the tinware around the oil cooler. It was. After closer inspection, it became apparent that the aluminum fan shroud had, well, started to fall apart around where the generator strap bolts to it. There is actually material missing - my fan shroud is self-machining itself apart and the annoying vibration is in fact the generator vibrating against the tinware which covers the oil cooler. This really sucks. Thankfully, I have located a replacement fan shroud which I will install later this month. I think that I will also have the tinware sand blasted and re-painted. I guess that time and 198,500 kilometers of driving on lackluster roads can shake a Volkswagen to pieces. Pretty strange though. -- Patrick 1963 Beetle 1967 Variant