Got new water pump less than 9 months ago. Now boiling sound and overheating smell. Temp says its good

I was having a overheating smell in my van for a while and then a loud knocking sound. Took to mechanic where he put a new water pump, seep belt and gallon collant. Now less than 9 months later I have overheating smell coming from under hood again. Temp says not overheating (but it didnt before the new pump either) but I can hear boiling water when I stop. Could have the water pump gone bad again so soon?

My car has 140000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello. The overheating issue your vehicle is having is likely not caused by the water pump once again. Though an inspection of your water pump performance should be checked when trying to diagnose this issue. The temperature gauge not going up to hot when the water is boiling will be a malfunction of the coolant temperature sensor. Overheating is likely caused by a faulty thermostat, a clogged coolant system, coolant system leak, or a bad head gasket. I suggest to have a technician perform an inspection of the possibilities I just mentioned including the coolant temperature sensor and it’s related wiring to help pinpoint exactly why the vehicle is overheating.

You are able to find a technician and schedule an appointment for your vehicle overheating here

https://www.yourmechanic.com/services/car-is-overheating-inspection

How to Identify and Fix Common car Problems ?

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

If it gets hot at all times, then it may have a clogged radiator, or more commonly a leaking head gasket. I would perform a block test prior to changing anything else. If that fails the test, then the engine will need to be disassembled and repaired. If it passes, then it may need a radiator.
The most common reasons a Chrysler Town & Country is overheating are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat. Coolant leak (water pump, radiator, hose etc.)
Why is my car overheating but it has coolant in it? It could be that the coolant concentration is not correct, or you may have a bad thermostat, a failed water pump, broken drive belt, or a bad radiator or radiator fan.
Engine Overheating

A failing water pump will cause your engine to heat up, and that`s not a good thing. To prevent catastrophic engine failure, look for these signs of an overheated engine due to water pump failure, including: A fluctuating temperature gauge.

Pump overheating is one of the most common problems with a pump. It can be caused by several factors, including lubrication, damaged bearings, clogged filters and others. Overheating can cause a pump to seize up and fail, leading to costly repairs or replacement.
One common reason engines overheat while idling is a faulty or broken cooling system. This could include problems with the radiator, water pump, or fan belt. If any part of your car`s cooling system is not functioning properly, your engine may be at risk of overheating.
If your engine begins to overheat only when you`re idling, but the needle on the temperature gauge begins to move down once you pick up speed, the most likely cause is that something is wrong with the radiator fan. As you drive, air will flow over the radiator, which helps the coolant get cool again.
When a water pump gets replaced, it`s not unusual to have some coolant leaking and for the weep hole to see some seepage. If the leak is small, it could just be from the seal`s break-in period.
Recommended Services. The water pump moves the coolant through the system and the thermostat regulates this flow to maintain operating temperature. If the water pump has failed, the coolant will not flow through the system so the temperature will rise quickly and the heat will be concentrated on the engine.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Got new water pump less than 9 months ago. Now boiling sound and overheating smell. Temp says its good
ANSWER : Hello. The overheating issue your vehicle is having is likely not caused by the water pump once again. Though an inspection of your water pump performance should be checked when trying to diagnose this issue. The temperature gauge not going up to hot when the water is boiling will be a malfunction of the coolant temperature sensor. Overheating is likely caused by a faulty thermostat, a clogged coolant system, coolant system leak, or a bad head gasket. I suggest to have a technician perform an inspection of the possibilities I just mentioned including the coolant temperature sensor and it’s related wiring to help pinpoint exactly why the vehicle is overheating.

You are able to find a technician and schedule an appointment for your vehicle overheating here

https://www.yourmechanic.com/services/car-is-overheating-inspection

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.

car is overheating and leaking water and anti freeze
ANSWER : Coolant leaks can occur because of cracked hoses, leaking gaskets, faulty water pumps, or damaged radiators. When the coolant level goes low, the engine will start to overheat due to the low coolant level. I would first recommend giving the cooling system a visual look over. If it is not obvious where the coolant leak is coming from, I would recommed having the cooling system pressure tested in order to determine the leak source. If you would like to have your cooling system pressure testedcoolant is leaking inspection, consider YourMechanic, as a certified technician can come to your home or office to inspect your cooling system.

Can a jeep run and drive without a water pump??
ANSWER : Driving or running the engine without the water pump working to circulate the coolant through the motor will cause the motor to overheat and may damage the engine costing thousands of dollars versus using a tow truck to take the vehicle to the shop that will cost a lot less. I would not recommend running the engine more than a few minutes at a time or you will overheat it.

Water pump blew, found there was no oil despite having it changed a month ago. Can no oil cause a water pump to blow?
ANSWER : The oil works hand in hand with the cooling system to keep the engine cool. If the engine has no oil, there will be more friction inside the engine. This will cause moving parts to wear very quickly and then cause play in the valvetrain parts due to the wear. When this happens the engine starts to knock and sound really bad. If the engine is ran any longer, the water pump is very likely to blow out due to the extreme temperatures the engine is reaching. The engines cooling system is not strong enough to cool an engine that has no oil in it. I’m sorry this happened to you. If you would like more information on how water pumps work please click on the link. I am sorry this happened to you.

Car overheating, new water pump, new radiator, head gasket is good. Why is it overheating?
ANSWER : This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off. When your thermostat is not working properly or is stuck closed, this will not allow the coolant to properly circulate through the engine, which may cause the engine temperature to fluctuate erratically or in some cases just remain hot. Depending on the location of the water leak, this may also be the result of a failing water pump. You may notice a slight whining sound due to a loose water pump pulley, steam coming from the radiator (as you described) and the most obvious for most, the engine overheating. I would suggest having an expert from YourMechanic come to your home to diagnose your cooling system.

Whining from timing area after water pump was replaced
ANSWER : Hello.

All three of those are definite possibilities to the source of the noise. If the issue only started after that shop worked on your vehicle then they should be responsible for helping you figure out what the problem is. The issue was not there prior to them touching the vehicle, therefore something they did has to at least be linked to the issue.

I would return to the shop and have them either take care of the noise, or give you a refund so that you can have another shop or technician take care of it. If you decide to do the latter, consider YourMechanic, as one of our mobile technicians can come to your home to pinpoint the noise and help you fix it accordingly.

Cranks and runs rough have to keep foot in gas to keep running. Has new fuel pump and died while driving after pump was changed
ANSWER : Check fuel pressure. There are only three possible explanations: a fault in fuel supply (plugged filter, injectors, etc.); ignition system problems; and air induction including the idle air control valve, throttle position sensor, mass air flow sensor and vacuum leaks including the PCV and EGR systems. If obvious, and easy to check, possibilities do not reveal the fault, the recommended service to request is a rough running diagnostic and the responding certified mechanic will travel right to your location and get this diagnosed and resolved for you. It is also possible that diagnostic trouble codes have set and the mechanic will attempt to retrieve those using an appropriate scan tool. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.