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Discussion Starter · #1 ·
Hello fellow petrolheads. I drive a 740 from '88 with the b230f engine.
I changed the timing belt with a friend of mine. Afterwards I tried to start the engine twice which didn't work. I've never heard a sound like this before, like the engine was trying to turn but couldn't.

After checking every step we noticed that the crankshaft bolt wasn't tightened properly. We used only 60nm(44lb ft), although it needs another 60 degrees of turning. Bodged it.

Well, the engine is non-interference, but I don't know if this caused any damage.
As I'm 23 and only mildly experienced, I greatly appreciate any help on how to proceed. I really do like my car
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