All oil tank cap seals should have a large retaining washer in place, bolted through the cap, as in the photo. The seal falling into the tank and blocking the oil pick up port happened on a few occasions several years ago and most cars were modified to prevent it, sadly not yours though Richard. Thanks for bringing it to everyones attention again, you may have saved a few others a similar fate.

I don't know the history of your car but there have been some M3W's sold recently that have spent many years sat in garages and not been used or updated over the last 6 or more years. There have been lots of mods and improvements over that time and buying one of these cars could involve a lot of work to have a reliable car.


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