There is no timing belt. There is timing chain. You do not need to ever change it, they last. Except if you change smtg else around, like water pump.
20-30 US Dollars
If the water pump is bad ussually the heater will stop giving hot air .
drain the radiator, disconnect the radiator hose from the water pump. disconnect the water pump. lay down the seal connect the new water pump. connect the hose back to the radiator. its pretty easy
Sounds like either the windshield seal if defective or the heater core is leaking Check to see if water? is antifreeze
You need a manual on it to show you how and it will tell you.
How do you change a water pump on a 2002 Nissan Sentra?
change water pump
On a 1996 Nissan 200SX, the water pump is located on the front of the engine, typically on the driver's side, near the timing cover. It is driven by the engine's timing belt or chain, depending on the specific engine configuration. To access it, you may need to remove the serpentine belt and, in some cases, the timing belt cover. Always consult a repair manual for detailed instructions and safety precautions before attempting any repairs.
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