I just purchased a 1973 BMW 2002, and I'm super excited. But I have a really dumb question. The air filter assembly....is it supposed to be bolted onto the carb? Or does the hood, when closed, provide enough weight to keep the assembly over the carb? With the hood open, I can easily flip/lift the assembly away. There's no bolts or anything that attaches it securely to the carb. When I started up the car with the hood open, I can see the assembly shifting a bit, and then the whole engine shakes fairly violently.
I tried to search via this FAQ and also google, and there weren't any specifics that I could find. Any assistance would be greatly appreciated!