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Question:

What exactly does the timing belt and water pump do?

Would I notice a difference in driving if I changed my timing belt and water pump?

Answer:

Yep thats approximately good and those aspects are the lifeline of the motor vehicle the timing belt turns the motor and the water pump pumps the coolant with the aid of the engine. purely the pump and the belt plus different seals and and so on aspects is gonna run approximately 4 hundred+ in case you think of you're able to do it your self yet with the aid of fact it relatively is a greater luxurious acura yeah one thousand sounds good. i purely did my integra and that they quoted me i think of six hundred yet I did it myself for decrease than the cost of the climate.
If nothing's wrong with them, no you won't feel any difference
The water pump helps with the cooling of your engine while it is running and your timing belt keeps the valves opening at the right time. If your timing is off you will ruin your engine and bend your valves. Changing it should help improve performance as long as it is done right.
Question is vague. Timing belt makes sure your valves are open or closed when your pistons are up or down. If your timing is off because your belt jumped you may have anything from a slight miss, higher temps, to bent valves and need a new motor. (you would know) Water pump is probably driven by your timing belt, and keeps coolant circulating through your engine block to keep your motor cool. A bad water-pump may leak, or be so worn that it no longer pumps enough coolant to keep the motor cool. Unless your vehicle is overheating, or you are leaking coolant you probably do not need to replace the water pump. The exception is that if it is a long and expensive job to replace and you are already torn down to your water pump, then people usually opt to get it done to save themselves money down the road. Timing belts in interference engines (motors where the valves and pistons occupy the same space at different times) should be changed as recommended by the manufacturer. If you fail to do this and one breaks or jumps enough you will be spending thousands. Hope this helps.
If your car is overheating then you might need to change your water pump. If the pump is making a bunch of noise, the bearings might be worn out in it too. The timing belt just keeps your overhead cam in time with the crankshaft - you should replace it at the intervals recommended by the manufacturer - especially if your engine is considered an 'interference' engine - meaning that if it jumps time the valves will hit the pistons. You won't notice any difference in performance with either component though. For performance, check your plugs, plug wires, air filter, run some fuel injector cleaner through your gas, and replace the fuel filter. Other performance related issues include - fuel pump failing or reduced compression (due to piston rings being worn out).

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