I brought my 1996 Toyota Corolla to the dealer for maintenance service (asked for CAD$129.95) and replacing the timing belt (asked for CAD$335.95) this morning, and I prepared have to pay approximately $500 when I get my car back. However, the Service Manager called and advised that the water pump of my car needs to be replaced too because of the leak. He told me the parts will cost me around CAD$100 and will charge me 3 hours for labour. I asked why I need to pay 3 hours for labour because the technician had already raised the hood for replacing the timing belt.
I would appreciate very much if anyone could tell me whether it is reasonable to charge me 3 hours for labour cost for replacing the water pump in this scenario, and please also tell me what is the indicator that it is time to change the water pump.
Thank you in advance for your opinion.