The three (or six)bolts hold the pulley to the balancer, and prevent it from rotating on the crank. If you're pulling the whole thing off, you still need to separate the pulley from the balancer to access the threaded holes for the balancer puller tool.
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Chris
64 190D R.I.P.
80 240D W/617 engine -for sale
82 240D -for sale
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