On Honda models, you really should replace the coolant pump when replacing the timing belt as a leaking pump will ruin the belt. I learned this the hard way, when my Acura developed a coolant pump leak about 1 month after I'd shelled out big bucks for a new timing belt. Then, I had to pay for another belt as well as the pump. It cost a fortune in the end.
Mercedes' system of timing chains and a v-belt for the accessories is MUCH better. When MB's begin to come with timing belts, the automotive world will have sunk to a new low.
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