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 INFINITI G37, start by inspecting the most visible and accessible areas. Begin with the hose connections, as loose or damaged hoses are often the simplest culprits behind leaks. Next, examine the radiator for any signs of cracks or corrosion, as a compromised radiator can lead to significant overheating issues. If you notice coolant pooling at the back of the engine on the driver's side, this may indicate a leak from the water pump or related components, which should be checked next. Pay special attention to the water inlet gasket, as leaks in this area can be subtle yet problematic. If the leak persists, investigate the front engine cover and timing chain cover, particularly in the 2013 model, as these areas are known for potential leaks. Lastly, don’t overlook the coolant bridge and its associated hoses, as these can also be sources of leaks. By following this diagnostic approach, you can effectively identify and address coolant leaks, ensuring your vehicle remains in optimal condition and preventing further damage from overheating.
When tackling coolant leaks in your INFINITI G37, it's essential to understand the common problems that can arise within the cooling system. One frequent issue is a faulty head gasket, which can lead to significant coolant loss and engine overheating. Additionally, radiator leaks are another prevalent concern, often resulting from corrosion or physical damage. Hoses can also deteriorate over time, leading to cracks or disconnections that allow coolant to escape. Water pump failures, particularly those involving the weep hole, can further exacerbate coolant loss. By being aware of these common failure modes, you can more effectively diagnose the source of the leak and determine the appropriate repair solutions, ensuring your vehicle remains in optimal condition.
Addressing a coolant leak in your INFINITI G37 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 overheating, which poses a significant risk of engine failure and costly repairs down the line. The coolant system is essential for regulating engine temperature, and any disruption can result in catastrophic damage, such as a blown head gasket or a compromised radiator. Moreover, a coolant leak may signal deeper issues with components like the water pump or timing cover gasket, which require immediate attention to prevent further complications. By prioritizing the repair of coolant leaks, you not only enhance the safety and reliability of your vehicle but also save yourself from the financial burden of extensive repairs in the future. Therefore, it is imperative to act swiftly at the first sign of a coolant leak to ensure your INFINITI G37 remains in optimal condition.
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