Car temperature keeps going up and coolant level drops.

I recently purchased a coolant reservoir bottle since the old one had a crack and was dripping coolant, i flushed the coolant from the radiator as well. After refilling the coolant, i noted that the car started to misfire, and the temperature is going up. In addition, when the temperature rises, i stop the car and check the coolant level, every time i check after this happens, the coolant level drops a lot, i have to refill. After taking the car to a diagnostic garage, they couldn't find any problem using the diagnostic machine. But after checking the engine oil, they found it to be milky.
Experienced mechanics share their insights in answering this question :
Hi there. The milky engine oil is caused when the coolant from the cooling system gets into the engine oil. There are two ways that the coolant can mix with the oil on your vehicle. The first way is through the intake manifold as the gasket may crack causing the coolant to drain into the valley area making the coolant mix with the engine oil. However, the engine will not overheat quickly when this happens. The second way for the coolant to mix with the engine oil is through a burned head gasket. To verify that the head gasket is burned, get a block tester from your local parts store and set up the tool by putting the blue chemical in the tube and putting on the plunger on the end. Then remove the reservoir cap or radiator cap (take precautions of the coolant) and start the engine. Take the tool and place it over the inlet area to the reservoir or radiator. When steam starts to form in the area, use the plunger and suck in the steam into the tool. If there is any hydro carbons (raw unburnt fuel) in the cooling system, then the blue chemical will turn to a yellow or greenish color. If the color changes, the head gasket is burned and needs replaced. If the chemical does not change color, then the head gasket is good and there could be a leak on the intake gasket. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your engine overheating issue.

How to Identify and Fix Common car Problems ?

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When the intake manifold gaskets have an issue, they can cause drivability problems and even engine overheating. Usually a faulty intake manifold gasket will produce a few symptoms that can alert the driver of a potential issue.
If it`s still overheating after a head gasket replacement, there`s a good chance that the engine has suffered damage. This may be better than it sounds, as components like a damaged thermostat could be to blame. But it could also mean that the engine block itself has become cracked or slightly warped.
If the head gasket fails between a coolant channel and one of your engine`s combustion chambers, the engine may start to consume coolant. This can lead to the engine overheating, too, due to an insufficient coolant level.
When intake manifold gaskets become damaged, coolant may begin escaping from its system. Eventually even a relatively small leak will eventually cause coolant levels to drop to dangerous levels. Be sure to take note of any signs that your car may be experiencing a coolant leak.
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.
Most engines will blow a head gasket when the coolant temperature has reached 260 degrees or more.
But there`s a more urgent issue to be aware of if you`re driving with a blown head gasket: if the coolant is leaking, then it`s no longer available to cool down the engine. Without this support, the engine will soon overheat if you keep driving – leading to further cracking and damage to your engine.
Generally a really bad intake manifold gasket will make a car run rough at idle and/or cause a service engine light to illuminate. … As far as driving the car, as long as you don`t have a fluid leak or the car is not stalling or running rough, it should be fine to drive for a few months.
When they blow, intake manifold gaskets and head gaskets will typically leak different substances. A blown intake manifold gasket may cause air or fuel to leak. A blown head gasket, on the other hand, will typically cause combustion gases, coolant or oil to leak.
May cause overheating. Also, a dirty air filter will not be able to provide the oxygen needed to provide a proper air-fuel mix. This can cause the temperature of your engine to rise to dangerous levels. Eventually, your vehicle`s engine could overheat which could lead you to the side of the road.
Generally a really bad intake manifold gasket will make a car run rough at idle and/or cause a service engine light to illuminate. … As far as driving the car, as long as you don`t have a fluid leak or the car is not stalling or running rough, it should be fine to drive for a few months.
The upper intake manifold may develop an internal coolant leak causing one or more cylinders to fill with coolant. This can cause the engine to “hydro-lock” and not turn over. Removing the spark plugs will allow the engine to turn over pushing the coolant out of the spark plug holes.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Car temperature keeps going up and coolant level drops.
ANSWER : Hi there. The milky engine oil is caused when the coolant from the cooling system gets into the engine oil. There are two ways that the coolant can mix with the oil on your vehicle. The first way is through the intake manifold as the gasket may crack causing the coolant to drain into the valley area making the coolant mix with the engine oil. However, the engine will not overheat quickly when this happens. The second way for the coolant to mix with the engine oil is through a burned head gasket. To verify that the head gasket is burned, get a block tester from your local parts store and set up the tool by putting the blue chemical in the tube and putting on the plunger on the end. Then remove the reservoir cap or radiator cap (take precautions of the coolant) and start the engine. Take the tool and place it over the inlet area to the reservoir or radiator. When steam starts to form in the area, use the plunger and suck in the steam into the tool. If there is any hydro carbons (raw unburnt fuel) in the cooling system, then the blue chemical will turn to a yellow or greenish color. If the color changes, the head gasket is burned and needs replaced. If the chemical does not change color, then the head gasket is good and there could be a leak on the intake gasket. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your engine overheating issue.

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.

Where is my coolant going? My car keeps overheating and blowing cold air. The temperature rises when stopped and drops when accelerating.
ANSWER : Look everywhere around the engine and see if there is a split hose or loose hose clamp. If the hoses and clamps are in good shape and tight, then check the core plugs (freeze plugs) and see if there is any residue that indicates a leak. If there is no residue or core plug leak, then take the dipstick out of the engine and see if the oil is milky or not. If the oil is milky, then a head gasket is burned and water is getting pushed into the oil system. If the oil is normal color, then the cooling fans may not be working properly and causing the coolant to boil out of the overflow tubes. This would explain why the vehicle overheats when sitting but runs cool when in motion. Check the fans to see if they are working. If the fans are not coming on, then the fan motor relay, fuse, or motor could be all burned out making the fans not work. If you need further assistance with your engine overheating at a stationary position, then seek out a professional, such as one from Your Mechanic, to help you.

Replaced alternator on car 2 times each time shows it’s charging 14v let car run for a little bit then test drive and car voltage
ANSWER : There are reports that the replacement alternators will not communicate with the engine computer and will not charge correctly. I recommend using only the manufacturer approved replacement part. It can be new or remanufactured but approved for use in the vehicle. Some lower cost alternators on the aftermarket will have charging problems since they will not communicate with the ECM on the vehicle and will stop charging.

Shifting from 2nd to 3rd, car stopped going fast. Now it won’t go at all.
ANSWER : It is possible that your clutch has failed. The sound you are hearing is likely due to the clutch not engaging with the engine due to it being worn. I would recommened having your transmission inspected by a qualified transmission expert to determine if your clutch requires replacement in order to resolve this issue. This inspection may require removal and partial disassembly of the transmission in order to verify that the clutch has failed.

I bought a used car 2010 nissan versa and when I go uphill it slows down alot. When going uphill it says go 60mph I am at that sp
ANSWER : Hi there. When a car is slow to accelerate it can be caused by multiple issues, ranging from fuel systems that are clogged or damaged to an ignition system component failure. It is also possible that something in the driveline system is dragging which causes the lack of acceleration. Since there are so many different possible issues, the best way to start the diagnosis process is to have a professional mobile mechanic from our team come to your location and complete a car is slow to accelerate inspection.

Coolant keeps magically disappering…
ANSWER : There is a leak, it just hasn’t been found yet. I would begin by having a close look at the radiator cap – a visual inspection and a pressure test. The cap is so inexpensive I would just replace it with a new one.

Pull the dipstick and inspect the oil. Remove and look at the oil fill cap and inside the valve cover. If you see any foaminess or latte-looking stuff, you are seeing water (coolant) in the oil.

Your Aveo should have a pressure tester put on the cooling system cold, and then start it and let it warm up while observing any pressure changes and looking for leaks. Let it run for awhile with pressure tester on it.

Someone will need to go under the car while its running, warmed up, with pressure still on the system, and inspect closely for leaks. If no external leaks are found, then coolant is leaking internally into the engine. This can happen through a leaking head gasket or cracked head. A head gasket test could also be performed to test for the presence of combustion gasses in the cooling system.

If you want to have this checked, a certified mechanic from YourMechanic can come to your home or office to diagnose your coolant leaking problem and help you move forward with repairs.

Car keeps cranking over when not holding key, but still wont start
ANSWER : It sounds like you have 2 problems here, the starter and an engine stalling problem. The starter problem is probably the starter solenoid, a power switch (integrated into the starter assembly) that takes a small current from the ignition switch and engages a large current at the starter. The contacts in the solenoid can burn over time, "sticking", which can cause the starter "run-on" like you described, and a "no crank" condition, because the same burned contacts don’t pass heavy current very well. The poor idling may be due to a dirty idle air control valve, dirty throttle body, or air leak in the intake system of the engine. I would recommend having YourMechanic dispatch a mobile, professional mechanic to your location to do a (Starter Replacement)[https://www.yourmechanic.com/services/starter-replacement] and car starting trouble inspection.