An irregular knocking sound began about a week ago in our 2000 Honda Civic.
The mechanic has told us that the Acc. Belt Tension Pulley needs to be replaced, and that this is related to the AC compressor in such a way that both should be replaced. Something about the way they fit together, they said if we didn't replace them at the same time, we'd be back in the shop within a couple months.
My concern is that the AC compressor replacement is ~$500 on top of the rest of the work to be done. The AC works fine in the car, pumping out cold air etc. Does it really need to be replaced as well?