Do I need to replace timing belt again of replacing water pump?

I just received a quote and mechanic said that I must replace timing belt if I replace water pump. Is this true?

I thought it was only recommended to replace pump, when replacing timing belt because they are more faulty.

My car has 143000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
The water pump and timing belt should be replaced as a set if the coolant leaked on the belt. The coolant leaking on it will damage the belt.

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Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Should I replace the water pump with the timing belt? It is not necessary to replace both at the same time, however, it is highly recommended due to a high risk of engine damage. All parts of the synchronous drive have the same mileage and wear.
How often do timing belts need to be replaced? Timing belts are replaced as part of scheduled maintenance, usually every 60,000 to 100,000 miles.
The 2010 Dodge Grand Caravan 3.3L and 3.8L engines have a timing chain and are interference while the 4.0L engine has a timing belt and is non-interference.
When you have the timing belt replaced at a reputable service center, the service should also include a few other things. The tensioner and idler rollers should also be replaced. The technician will also inspect the crankshaft seal and the camshaft seal, replacing them if necessary.
So when the water pump must be replaced, it is a good idea to go ahead and also replace the timing belt, timing belt tensioner and idler pulleys.
It is possible for a failing water pump to cause the timing belt to break, resulting in expensive engine damage. Water pumps are driven by timing belts, so when the pump stops, seizes or the bearing fails, the timing belt may break or come off.
No timing belt will give an increase in performance – it`s just not possible. Its main job is to keep the timing in check. Having your timing belt replaced and noticing an increase in performance is just a mix of the engine operating at peak efficiency and a good hit of placebo effect thrown in for good measure!
In order to cater the different needs of the market, timing belt kits are also available without a water pump.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

My water pump is leaking but I replaced timing belt and pump a year ago. Can I just replace the water pump this time?
ANSWER : Hello. You can just replace the water pump in this case. Although, the cost of just the timing belt is fairly negligible in comparison to the total labor of the job. My estimator says the water pump is a 6.5 hour job. Multiply that by whatever the shop rate is and you have the total labor without parts. You end up saving about $100 or less on parts if you only replace the pump.

The deciding factor will be the condition of the timing belt. If it has problems, you won’t be saving yourself any money by reusing it. In addition, there are seals and pulleys that may need to be replaced as well.

Assuming all the related parts were replaced the first time around, there isn’t a reason you can’t reuse them. I would say you should weigh the savings of reusing them against the actual condition of the parts. This is best determined after a complete disassembly. Keep in mind, time estimates will vary a bit depending on many factors. Either way, the labor is the largest cost.

If you would like to have the water pump replaced, a certified professional from YourMechanic can come to your car’s location to perform this service at your convenience.

I had my timing belt and water pump replaced 45000 miles ago. Now I am told I need to replace water pump. Is this normal?
ANSWER : Hello there, 45,000 miles is a short lifespan for a water pump on your 2000 Honda Odyssey. There are a few reasons the water pump will need to be replaced, such as a pump bearing failure, water pump seal leak, or rust/contamination damaging the pump. Faults such as rust or particles in the cooling system are formed in the cooling system over time and the parts break down, or regular coolant flushes are not performed. These particles can cause the pump to fail prematurely. It would be a good idea to ask why the water pump needs to be replaced or take note of any symptoms you are experiencing with the car before moving forward with this. If you would like to have an expert give you a second opinion on this, a certified technician from YourMechanic can come to your location to inspect the car and replace the water pump if necessary.

hi- i got an estimate to replace my timing belt and water pump for my 2012 pilot. Do these figures seem right? Timing belt (35.00)
ANSWER : Hi there. That is a fairly good and detailed estimate for this type of service. It also falls within the price estimation to have a mechanic shop complete this service. However, you might want to consider a third option, of having a professional mobile mechanic come to your location and complete the timing belt replacement and water pump replacement. Simply click the blue links to receive an estimate for both services.

Does the water pump need to be replaced if the water pump belt is showing signs of wear? Or just the belt?
ANSWER : Hi, thanks for writing in. There is no reason to replace the water pump every time the belt is changed, unless the pump itself is damaged or not working properly. The belt may show signs of wear which is fairly common between 80k-100k miles. I would not recommend putting the belt service off as this can cause major damage if the belt were to snap. I would recommend having an expert from YourMechanic come to your home to inspect your belts to determine when and if they would need to be replaced, while at the same time inspecting your water pump and cooling system to be sure there are no issues with it.

Do I need to replace timing belt again of replacing water pump?
ANSWER : The water pump and timing belt should be replaced as a set if the coolant leaked on the belt. The coolant leaking on it will damage the belt.

Hello, I have 2007 Toyota Prius 135000, I have had it since 67000, do I need to replace water pump? Serpentine belt? maintenance?
ANSWER : Hello. If your vehicle just needs the serpentine belt then that needs to be replaced. There is no reason to replace the water pump if it is not leaking or making noise. You could have it changed as maintenance, but there really is not reason to do so. As for the other items, with this many miles I would have the vehicle tuned up and also change any fluids that have not been changed. You should have these items replaced by a certified mechanic, like one from YourMechanic, as they can come to you to [replace your belt and do the maintenance on the vehicle] https://www.yourmechanic.com/services/serpentine-drive-belt-replacement

How can I tell if the water pump has been replaced as the previous owner claimed?
ANSWER : Hi, thanks for your question. The best thing to get when purchasing a car are service records. If the seller doesn’t have them in hand, you can go to the shop that did the work and they will have records of the repair details. If the car looks meticulously maintained, that is a really good indication of the condition of the car. And yes, the timing belt likely would have been replaced along with the water pump.

To add, an experienced technician can tell if the timing belt has been replaced. A timing belt with 100,000 miles on it will look significantly different than one that has been replaced. There will need to be some disassembly to see the belt, but it isn’t that much work to be able to take a look at it. The water pump on the other hand takes significantly more work to see. I can say that almost all shops, including YourMechanic, will advise a customer to replace the timing belt and water pump at the same time. This is standard in the industry.

If there is any question, ask for the records. It should be an easy thing to go to the shop that repaired it and get the information. Sometimes the customer will have to call the repair shop to allow them to release the information.

Good luck! Sounds like a good car.

I need my timing belt replaced for my 2011 Chevy Aveo and I was wondering if it’s also necessary to replace the water pump? Someon
ANSWER : The timing belt should be changed at 100,000 miles. If the water pump is driven by the timing belt, the pump absolutely should be changed when you change the timing belt. Indeed, aftermarket timing belt kits include the water pump, along with the timing belt and components, inasmuch as changing the water pump is recommended. All rotating pulleys that the timing belt rides on should be changed as well (included in kits) because the grease in those pulleys dries out. If the water pump is NOT driven by the timing belt (some Aveo’s) there is no need to change the pump at this time as it can be accessed later without disturbing the timing belt. Dealer OEM parts are preferred but if you buy aftermarket parts use only a reputable name brand such as Gates. If you desire that the timing belt, components, and water pump be installed by a certified Mechanic, dispatched by YourMechanic right to your location, please request timing belt replacement and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.