I have a 2005 toyota camry water pump and serptine belt went does the timing chain need to be replaced with water pump replacement?
Not necessarily. Unless you have signs of a stretching or bad timing chain, leave it. You don't say what engine you have or how many miles on it, but in many engines you may have an overlapping cover. The two jobs tend to be done together because by the time you strip the front of the engine to get to the timing chain, or water pump, you may as well do the other job - except a water pump is relatively inexpensive compared to the timing chain, so if you are doing a timing chain, it makes sense to do the water pump. The reverse however is not financially practical.
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