The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.
When the head gasket begins to fail, the engine may have no symptoms at all. They only begin to occur when the leak has reached an engine oil passage, engine coolant passage or the engine cylinder.
When that happens, the engine may be very difficult to start, and run roughly when idling. There may be oil or coolant leaking, and the engine may begin to overheat, or at least run hot. At this point, there may be coolant in the engine oil pan — this will look creamy and lighter in color than the oil. Also, the radiator or engine coolant reservoir may have a gurgling sound, the presence engine oil, or smell of combustion. And the check engine light will come on.
The coolant being burned in the engine will produce white exhaust that smells sweet, like engine coolant. When the head gasket fails completely, the engine will overheat within minutes of starting, will stall and then won't restart.
A failing heater core may cause the car's interior to smell like engine coolant. The smell will become worse when the heater is turned on. The engine may also begin to run hotter until the vehicle is repaired.
The worst-case scenario is the engine overheating, which can cause extensive engine damage.
If the heater core is clogged, the air that blows when the heater is turned on will not be very hot.
Problems with the intake manifold gasket can create the following symptoms:
» LEARN MORE: Intake manifold gasket symptoms
A failing radiator can cause the engine to run hot or overheat. Most radiators are made of metal and plastic. The plastic parts can become brittle and crack over time, causing a leak of coolant (typically green or pink in color). All manufacturers have a recommended service interval for coolant renewal. As the coolant ages, the additives breakdown and being to form solid deposits. These deposits will build up in the passages of the cooling system and will eventually clog components, including the radiator. A leaking or clogged radiator must be replaced. Some automatic transmission cars will also have a transmission cooler integrated into the radiator. Lines going to and from the transmission circulate transmission fluid to help cool the transmission in heavy duty applications such as towing or off-roading. If this integrated cooler fails, it can allow transmission fluid and coolant to mix. This will causing shifting issues in addition to overheating.
A coolant leak may be noted from the hoses. Coolant hoses can be damaged by oil leaks, or age. This will lead to swelling or cracking, it is suggested to replace the hoses before they begin leaking to avoid potential overheating.
The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.
A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.
A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.
» LEARN MORE: Signs of a bad thermostat, and how to fix it
The two most common signs of a bad pump are leaks and noises.
Leaking water pumps can result in damage to the drive and timing belts, and cause the engine to overheat. A failed water pump can be caused by other problems in the cooling system, such as a bad thermostat, radiator or head gasket.
When troubleshooting coolant leaks in your Nissan GT-R, start with a careful inspection of the hoses, as they are often the primary source of leaks. Look for any signs of wear such as cracks or brittleness, particularly at the connection points to the engine and radiator. Next, examine the coolant reservoir and radiator for any visible leaks, as these components can also fail over time. After identifying potential problem areas, check underneath the vehicle for colorful puddles, which can indicate the presence of coolant. If you suspect a leak but cannot pinpoint the source, allow the vehicle to cool down completely and inspect it again. Common culprits include damaged hoses, a leaking radiator, or a faulty water pump, so be sure to assess these components thoroughly. If the leak is minor, consider using a commercial stop leak product as a temporary fix, but remember to follow the manufacturer's instructions for best results. By systematically diagnosing the issue, you can effectively address coolant leaks and maintain the performance of your GT-R.
When tackling coolant leaks in a Nissan GT-R, it's essential to understand the common problems that can arise within the cooling system. One frequent issue is the deterioration of coolant hoses, which can develop cracks or leaks over time due to heat and pressure. Additionally, the water pump may fail, leading to inadequate circulation of coolant and potential overheating. Another common culprit is the thermostat housing gasket, which can wear out and cause leaks around the engine. Rust or debris in the coolant can also indicate a blocked radiator, further complicating the issue. Regularly checking coolant levels and inspecting for visible leaks under the vehicle can help you catch these problems early. If you notice a sudden drop in coolant levels or find puddles beneath your car, it’s crucial to address these signs promptly. While DIY repairs can be effective for minor issues, consulting a certified Nissan mechanic is advisable for more complex problems to ensure your GT-R remains in optimal condition.
Addressing a coolant leak in your Nissan GT-R is not just a matter of routine maintenance; it is a critical step in safeguarding your vehicle's performance and longevity. Ignoring a coolant leak can lead to severe engine damage due to overheating, which can compromise essential components and result in costly repairs or even complete engine failure. Moreover, a leaking coolant system can significantly impact your vehicle's efficiency, leading to diminished performance and a less enjoyable driving experience. The safety of you and your passengers is also at stake, as coolant leaks can create hazardous situations, including the risk of engine fires. Additionally, maintaining your GT-R in optimal condition is vital for preserving its resale value, as potential buyers are likely to be deterred by signs of neglect. Therefore, it is imperative to address any signs of a coolant leak promptly to ensure your Nissan GT-R remains reliable, safe, and valuable for years to come.
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