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I'm just about to change the cambelt on my 89 745 (B230) at 185k miles. The three oil seals are original and no significant oil leaks are evident. Should I change them anyway as I always think you can make matters worse e.g. by fitting a new seal on an existing wear ring. Also, should I change the belt tensioner, even if it feels smooth (it's original)? If so, would you only use a genuine part? Brits, like me, have a tendency to leave well alone if a thing still works but your opinions are much appreciated. Regards.
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BillB
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