Transmission cooler line leaking

The transmission cooler line leaks at the radiator connection.
Experienced mechanics share their insights in answering this question :
Hi there. It is very common to see leaks at this connection. The metal transmission cooler line connects to the radiator with a set of flare fittings. It is common for these to either come loose or to become warped and start leaking. You can check to see if the connections are loose and tighten them up until they are snug. You want to use a flare wrench for this to prevent from warping the connections. If they are tight then you need to see if the connections look crooked. If they are then they may be cross threaded. If they are then it may need a new radiator and new connections for the hoses. I would get some assistance from a certified mechanic, like one from YourMechanic, as he/she would be able to diagnose your leaking issue.

How to Identify and Fix Common car Problems ?

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

A transmission fluid leak can be caused by a gap in your transmission lines, or a space in the pan gasket, torque converter, fluid lines, the transmission pan, or any of the seals that holds these parts together.
If you discover a leak from a gasket or seal in your transmission, the best way to stop the leak is to simply add BlueDevil Transmission Sealer to your transmission fluid.
A transmission leak will not get better on its own. If it goes unchecked, vehicle operation will eventually be affected, and you may find yourself with an expensive repair. So, while it may be safe to drive with a leaking transmission, it`s not advisable, and you shouldn`t put off fixing the problem.
You can simply cut the line and attach the adapter, which will make its line. Rubber hoses are another option for repairing your transmission line. However, you should only pick the ones that are specifically designed for transmission only. Moreover, they are not designed for heat.
3. Transmission overheating. When a transmission oil cooler hose fails it can cause the transmission to overheat. This can be due to low fluid level from a leak or preventing flow.
If the oil cooler lines begin to leak, they will let a good bit of the oil outside the vehicle since the lines are usually under pressure. What causes hoses to leakRunning the vehicle without the right amount of oil will usually lead to a variety of different problems and can include engine failure if left unattended.
Although there are multiple places on a vehicle where transmission fluid can leak, the 3 most common include: Pan gasket. Cooler lines. Output, tail, or torque converter seal.
Driving your car with a bad transmission cooler is definitely not recommended. Because you will lose most of your transmission fluid while the car`s transmission is in operation and you are in motion, it is very difficult to know how much fluid you are losing, and at what rate.
An overhead line typically has a wider easement footprint than an underground line. Underground high-voltage transmission lines have a life expectancy of 40+ years, while overhead lines have a life expectancy of more than 80 years.
There is a core connected to the transmission cooler lines that circulate ATF in the engine radiator tank. The core is submerged in engine coolant and is sealed to separate the two fluids. Due to the physics of heat transfer, the core can transfer the heat in the ATF to the engine coolant in the radiator.
If there was a rupture of the internal radiator tank can cause the coolant to mix with and contaminate transmission fluid. The engine coolant can also become polluted by the transmission fluid, as the pressures of either liquid vacillate.
Your car`s transmission lines are essential to preventing the transmission from overheating by carrying hot fluid away from the transmission until it is cooled and subsequently pumped back into the transmission.
When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it`s vibrating. Your car will vibrate even when you`re not going very fast. The shuddering makes the car lag and is very noticeable.
The torque converter pushes the transmission oil throughout the transmission. It`s basically a pump, and if this pump develops a crack, you`ll end up with a transmission leak. The needle bearings inside the torque converter can also get damaged and this, too, will cause a transmission fluid leak under your car.
In most cases, the cause of the leak is due to: Leak in the transmission pan. Damaged fluid lines or pan gasket. Faulty torque converter.
Leaking Coolant

When an oil cooler fails, it can force all the coolant out of the engine and raise the risk of an overheated engine, which may lead to possible engine damage. If the leak is significant, you`ll notice coolant on the ground or see steam gushing out from underneath the hood.

If the leak is small, you may notice coolant puddling on the ground underneath your vehicle. If the leak is a large one, you will probably notice steam pouring out from under the bonnet of your vehicle.
Silicone Rubber Adhesive Sealant uses only a bead of sealant to make the seal between transmission and pan. Although original equipment manufacturers use silicone sealant in these applications, most gasket types will work with these style pans as they are of the flat surface type.
One tiny fluid leak can lead to complete transmission failure if left ignored. If there is not enough fluid running through the system, parts will lose vital lubrication and bad things will happen inside the transmission. Transmission fluid is usually red in color and is fairly easy to identify.
If the water meter test indicates a leak inside your home, check the cabinets under the kitchen, laundry, and bathroom sinks to make sure they`re dry. You`ll also want to look for puddles around the bases of tubs, toilets, and showers and beneath the water heater, dishwasher, and clothes washer.
The only way to clean a transmission cooler is to use the only transmission cooler flushing machine that can get rid of 99.9999% of debris and contaminants in the cooler.
Yes, it can! In this Maintenance Minute, Andrew Markel talks about how and why rough transmission shifts can be caused by the air filter and what some of the likely culprits are.
1-2% of energy is lost during the step-up transformer from when the electricity is generated to when it is transmitted. 1-2% of energy is lost during the step-down of the transform from the transmission line to distribution.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

My car’s oil cooler line is leaking antifreeze
ANSWER : Hello. From what you describe, it appears that you are being provided with conflicting information. Oil cooler lines will usually leak oil, as oil is what flows through those lines. If the engine is leaking coolant, then it is either from the coolant lines that go to the oil cooler or from somewhere else in the cooling system.

My research indicates that the coolant lines that go to the oil cooler use regular hoses and should not require any special tools to remove. If Firestone said they are unable to do the repair, I would find another technician to work on the vehicle. In order to provide you with the part number I would need to know which hose is leaking, whether it is the feed or return hose from the oil cooler.

I recommend having a certified technician, such as one from YourMechanic, perform an inspection to determine why coolant is leaking and replace the oil cooler line if necessary.

Fuel EVAP line that runs under car is kinked how do I know if it is leaking? Also can I drive it like that if it’s not leaking?
ANSWER : Hi Ricardo. We answered your question earlier. However, if you didn’t receive the reply, here is what we stated earlier. In most cases, an EVAP leak will create an OBD-II trouble code. The best way to detect an EVAP leak is by having a professional mobile mechanic complete a check engine light inspection, they will be able to download the code and determine the source of the leak. That’s the best advice we can offer you. Thanks.

I just replaced my radiator and it’s leaking transmission fluid.
ANSWER : Hi there. The transmission cooling lines are very tricky on a Mitsubishi Eclipse. Sometimes cross-threading or not properly tightening the lines can cause them to leak while, in some instances, a rubber o-ring inside the line might be pinched. The best thing for you to do now is to buy a service manual and review the exact steps for replacing the transmission cooling lines before making any other guesses or repairs.

Or, you can have a professional mechanic, such as one from YourMechanic, come to your location to complete an inspection to determine why the transmission fluid is leaking.

Are these oil leak problems related?
ANSWER : If the oil filter housing is integral to the oil cooler, or the housing had to be removed to service the cooler, a professional mechanic with knowledge of the limited service life of rubber seals would have absolutely (guaranteed) replaced the filter housing gasket that you are now belatedly finding leaks. However, if the leaking gasket is in an assembly that was not touched, or is not part of the cooler, they might be on reasonable grounds to have not fooled with it. These cooler configurations vary (from Mercedes Benz model to model) so, having the advice I just gave, you can just simply ask them what configuration you have and go from there. The bottom line is, if indeed, the gasket that is presently leaking was "right in front of them" while they did the warranty work, it should have been replaced simply as a matter of course. Indeed, the weak link on modern engines has become gaskets and seals. The engine will mechanically far outlast the gasket and seals but the problem is to replace all of them (once they all leak) you have to literally take the engine out of the car and take it apart just to put all new seals in. Please let us know how we can help further on this issue.

Will adding Transmission Fluid with Stop Leak to a transmission with over 230,000 miles hurt it?
ANSWER : Both of these additives are designed to block small leaks or seepage from a gasket or rubber seal an not to fix major leaks or leaks where there will be excessive pressures, such as coolant leaks into the combustion chamber of the cooling system or leaks in high pressure areas of the transmission.

I would not recommend the use of these products unless a manufacturer specified to use them, like how GM did on their earlier models of the modular motors that had coolant leaking through the pores of the engine block from defective castings.

Before adding any of these additives I would recommend having a mechanic check the transmission fluid leak to see what the proper repair should be. These additives can sometimes clog systems and make matters worse in the long run.

Cant find brake fitting for 1/4 line going into rear rubber line with tee.
ANSWER : Your best bet would be to have a professional perform the service for you since you are having so much trouble. These are the brake lines so you really want them done right the first time and a warranty in case something goes wrong and your pedal gets soft. The old fitting will need to be cut from the old line and placed on the new line and the new line flared as the vehicle is set up which may require that expensive tool. Consider hiring an experienced technician like one from YourMechanic who can help you avoid a tow fee and come out to take a closer look at the brake system damage to offer a more personal estimate on the repairs.

1998 mercedes benz c280 transmission fluid leak from top
ANSWER : Hi there. Unfortunately, we are not able to receive pictures or video to pinpoint damage or identify parts for vehicles through this platform. The best way to identify this item is to search online for a detailed schematic of your C280 Mercedes-Benz or contact a local MB specialist mechanic or the dealership service department to determine the parts name and function. You might also want to have a MB specialist mechanic install and inspect your vehicle for further transmission fluid leaks to ensure the repairs are correctly completed.

Transmission additive to stop pump seal leak I don’t want to spend $750 on repairs will a transmission stop leak fix it
ANSWER : You can certainly use transmission stop leak, however depending on how bad the leak is or the amount of pressure coming from the leak, this may be only a temporary fix. I would suggest having a professional from YourMechanic come to your location to take a look at the vehicle.