My car is getting overheated, replaced the water pump, but coolant is still running out.. After the car warms a lil..

Coolant is running out the car, replaced the water pump yesterday, coolant still flowing out, after the car is crunk about 5min..do you think I need a thermostat?? Or what could be the problem

My car has 128000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
A thermostat is a good first step with overheating issues, usually because it’s inexpensive and easy to replace. So it’s always good to eliminate that as a possibility, but I think you may have more problems then that. I presume you mean that coolant is running out of the overflow tank. This happens because of excessive pressure in the cooling system. It can happen if the coolant is low, because air pockets in the system cause hot spots where the remaining coolant will boil. It can be difficult to get all of the air out of the system so that’s a possibility especially since you just changed the waterpump. It can also happen if there is combustion pressure leaking into the cooling system as it does with a bad head gasket.

When you change the thermostat, find a heater hose or some other small cooling hose near the top of the engine and disconnect it. Refill the engine with 50% diluted coolant until coolant runs out of the hose you disconnected, then hook it back up. Run the engine with the defroster on maximum until you feel heat coming out of the dash vents, checking the coolant level periodically. When you feel good heat, you know the engine is full. If you continue to have a problem, contact YourMechanic and they will send a technician to your home to diagnose your cooling system and tell you what you can do.

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 Jaguar X-Type 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 your car is overheating after new radiator. The most common reason why your car is overheating after radiator replacement is air getting trapped inside the cooling system after the installation process. You may also have forgotten to plug in the temperature sensors or cooling fan after the installation process.
There may be a blockage, a leak, or something wrong with the radiator fan. Your car`s water pump is broken – The water pump sends engine coolant throughout the cooling system. There could be a leak or a shifted pump shaft, both of which can cause overheating.
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.
Every vehicle manufacturer, consisting Jaguar has developed its own coolant or requires a definite coolant that is unique to definite years and models.
If your car`s coolant reservoir is faulty, it`ll fail to combat the rising pressure inside the cooling system, resulting in your engine overheating and other expensive repairs.
It gets even more concerning and confusing when car overheating suddenly returns to normal. This phenomenon can happen for many reasons, like a bad thermostat, a faulty radiator, or a coolant leak. As such, it`s best to get your car checked by a professional— like RepairSmith!
That said, a severely overheating engine can cause the cylinder walls or the pistons themselves to warp, bend and deform. This will cause the perfect seal between the piston and the rest of the engine to lose integrity. Oil could be forced past the piston rings and into the engine, where it will burn the oil.
Leaks are the #1 reason a vehicle begins to overheat. Leaks in hoses, the radiator, water pump, thermostat housing, heater core, head gasket, freeze plugs and a few other things can all lead to problems with the vehicle`s cooling system.
Before installing a water pump it will be especially important to flush, drain and refill the cooling system with the OE (original equipment) specified coolant mix. On the contrary, the correct operation of the new water pump would be jeopardized.
If the coolant level is dropping and there is no external leak evident, then the coolant is probably leaking internally, into the engine. If the car has recently overheated then this could have caused the head gasket to fail. If it has, it could be leaking coolant into the combustion chambers.
Start your car`s engine and allow it to idle. Look through the radiator filler neck to see if the coolant flows. At this time, it should not be flowing as your car has not reached the operating temperature to cause the thermostat to open. If you find the coolant is flowing, it means the thermostat valve is open.
One way to check for proper coolant circulation is to check the upper and lower radiator hoses. The upper radiator hose should be hot, around 190–200 °F. (The safest and most accurate way to get this temperature reading is with an infrared thermometer.)
When it comes to Jaguar cars, the standard working temperature is between 160 to 170 Fahrenheit, or 70 to 90 degrees Celsius.
One way to check for proper coolant circulation is to check the upper and lower radiator hoses. The upper radiator hose should be hot, around 190–200 °F. (The safest and most accurate way to get this temperature reading is with an infrared thermometer.)
Start your car`s engine and allow it to idle. Look through the radiator filler neck to see if the coolant flows. At this time, it should not be flowing as your car has not reached the operating temperature to cause the thermostat to open. If you find the coolant is flowing, it means the thermostat valve is open.
If you have an older car, say that came with green coolant, you can flush it all out and put the newer style coolant in and then change it every five years or 150,000 miles. It`s perfectly backwards compatible if you want to do that.
Start your car`s engine and allow it to idle. Look through the radiator filler neck to see if the coolant flows. At this time, it should not be flowing as your car has not reached the operating temperature to cause the thermostat to open. If you find the coolant is flowing, it means the thermostat valve is open.
One way to check for proper coolant circulation is to check the upper and lower radiator hoses. The upper radiator hose should be hot, around 190–200 °F. (The safest and most accurate way to get this temperature reading is with an infrared thermometer.)

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

My car is getting overheated, replaced the water pump, but coolant is still running out.. After the car warms a lil..
ANSWER : A thermostat is a good first step with overheating issues, usually because it’s inexpensive and easy to replace. So it’s always good to eliminate that as a possibility, but I think you may have more problems then that. I presume you mean that coolant is running out of the overflow tank. This happens because of excessive pressure in the cooling system. It can happen if the coolant is low, because air pockets in the system cause hot spots where the remaining coolant will boil. It can be difficult to get all of the air out of the system so that’s a possibility especially since you just changed the waterpump. It can also happen if there is combustion pressure leaking into the cooling system as it does with a bad head gasket.

When you change the thermostat, find a heater hose or some other small cooling hose near the top of the engine and disconnect it. Refill the engine with 50% diluted coolant until coolant runs out of the hose you disconnected, then hook it back up. Run the engine with the defroster on maximum until you feel heat coming out of the dash vents, checking the coolant level periodically. When you feel good heat, you know the engine is full. If you continue to have a problem, contact YourMechanic and they will send a technician to your home to diagnose your cooling system and tell you what you can do.

No coolant in the reservoir. Seen low coolant message. I added 2 quarts of 50/50 coolant. Still getting the message. How much coolant doe it need?
ANSWER : Hi there. For the coolant light to go out, you would need to have the coolant between the low line and the full line for the light to go out. If the coolant is low and keeps on being low, then look for any signs of coolant leaks. You may have to use a coolant pressure tester to pressurize the reservoir to allow the leak to be found.

If you need further assistance with the coolant being low and the warning light being on, then seek out a professional, such as one from Your Mechanic, to help you.

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.

My car still overheats, I replaced water pump and thermostat, and now after water pump install it knocks bad
ANSWER : Hi there:

Trying to diagnose an overheating issue remotely is incredibly difficult. However, there are three things you can do to attempt to solve this issue. First, remove the water pump, verify it’s the right replacement part and reinstall with new gaskets. Second, flush the radiator coolant fully, as the issue could be caused by an obstruction inside the heater core or other coolant lines. Third, make sure to check all electrical connections to the radiator sensors and components. If you check and complete all three of those tasks, and you still have overheating problems, contact a professional mobile mechanic to complete a car is overheating inspection.

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.

Replaced water pump, radiator and thermostat car is still overheating. What can it be?
ANSWER : I’m sorry to hear about your overheating issues. There are a few possibilities that can cause an engine to overheat. The radiator, water pump, and thermostat are definite possibilities, but there are a few others that are possible also. A faulty cooling fan is the first thing that comes to mind, but it could also be a head gasket issue, clogged coolant passages inside the engine, or faulty radiator hoses. I would first look at the cooling fan and/or the cooling fan switch. It would be necessary to start with a cold engine and check to see if the fan comes on as the engine warms up. Most of the time, you can do a quick check by turning on the air conditioning, as this should signal the fan on also. If this is something you feel you could use a hand in diagnosing/repairing, contact a certified mechanic, like the mobile mechanics at YourMechanic.com.

My car has a coolant leak
ANSWER : Hello. The most common cause of a random coolant loss on this vehicle is a leaking intake manifold gasket. It commonly starts leaking coolant into the engine, which will be burnt off or will leak externally. I typically do a pressure test and a dye test on the system first to see if I can locate an external leak. If nothing is found, then I do a block test to make sure that there is not a head gasket issue. If nothing shows up there, then I replace the intake gaskets. If you need to have this done, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the coolant leak and replace the intake gaskets if necessary.