Is a clicking noise from our 2001 Citroen C5 related to the alternator?

We are getting a clicking noise from our 2001 Citroen C5 HDI's engine, which sounds similar to a steam engine flywheel rotating. I thought it might be the catalytic convertor, but I understand from the reviews it is to do with the alternator.

Asked on 17 July 2010 by Steve Phillips

Answered by Honest John
Might also be the hydropneumatic pump.
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