Mine was snug, but I just rocked it and spun it a little, if I remember correctly. The little bit of gap that was left disappeared when I tightened the bolt. You are supposed to use new tension washers, so use the old ones and crank on it until it's in. As long as you can get a couple of threads to catch, it will pull together. Then disassemble, put the new washers on, and tighten it up again.

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1982 300CD Petrol/Black Leather