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.
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.
To effectively diagnose a coolant leak in your 1998 Mitsubishi Galant, begin with a comprehensive visual inspection of the vehicle. Look for any visible signs of coolant pooling under the car or around critical components such as the radiator, hoses, and water pump. If no obvious leaks are found, the next step is to perform a pressure test on the cooling system. This test involves using a hand pump to pressurize the system, which can help reveal hidden leaks that may not be immediately visible. Additionally, monitor your coolant levels regularly; a consistent drop can indicate a leak somewhere in the system. Inspect the radiator and hoses closely for any cracks or damage that could be the source of the leak. Be alert for unusual signs, such as white smoke from the exhaust, which may suggest coolant is leaking into the combustion chamber, or a sweet smell that indicates coolant is escaping. By following this systematic approach, you can effectively identify and address any coolant leaks in your vehicle.
When dealing with coolant leaks in a 1998 Mitsubishi Galant, it's essential to understand the common culprits that may be at play. One of the primary sources of leaks is a damaged radiator, which can develop cracks or corrosion over time, leading to coolant escaping. Additionally, worn-out hoses are another frequent issue; these rubber components can deteriorate due to heat and age, resulting in leaks. A faulty water pump is also a potential problem, as it can fail and cause coolant to leak from the engine compartment. Furthermore, a cracked engine block, although less common, can lead to significant coolant loss and should be inspected if other sources are ruled out. Loose or damaged hose clamps can prevent a proper seal, allowing coolant to escape, while a leaking heater core can introduce coolant leaks inside the vehicle, often accompanied by a sweet smell or foggy windows. Addressing these issues promptly is crucial to avoid overheating and further engine damage, making regular inspections and maintenance vital for keeping your Galant in good working order.
Addressing a coolant leak in a 1998 Mitsubishi Galant is of utmost urgency due to the significant risks associated with engine overheating. Coolant plays a vital role in maintaining optimal engine temperature, and a leak can quickly lead to a dangerous situation where the engine runs hot. This overheating can result in severe damage, such as warping the cylinder head or even cracking the engine block, which are costly repairs that can be avoided with timely intervention. Furthermore, a rapid loss of coolant not only jeopardizes the engine's health but can also leave you stranded if the vehicle fails while driving. The performance of your Galant can deteriorate, leading to a compromised driving experience. Therefore, it is essential to inspect and repair any coolant leaks as soon as they are detected, ensuring the vehicle operates safely and efficiently while preventing extensive damage and costly repairs down the line.
Not sure what's wrong?
Get help from a trusted expert
See what others are asking about their Mitsubishi Galant. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other Mitsubishi Galant drivers like you.