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
If a vehicle is overheating, a bad thermostat could be the problem, and a damaged thermostat housing is more likely to produce a coolant leak, either from a cracked or warped housing or a failed seal to the engine. The thermostat housing can be made of metal or plastic. And the housing can be a stand-alone part that is separate from the thermostat, or (on later model vehicles) can be integrated with the thermostat and replaced as a single unit.
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 tackling a coolant leak in your Buick Regal, start by observing any signs that may indicate a problem. Look for symptoms such as overheating, a decrease in coolant levels, or any unusual puddles under your vehicle, which may be colored and have a sweet smell. Once you’ve identified potential issues, proceed to inspect common leak points, including the radiator hose, water pump, and thermostat housing. A thorough visual inspection can reveal visible signs of leakage, which is crucial for pinpointing the source of the problem. If you suspect a leak but cannot locate it, consider using a pressure test to help identify hidden leaks within the cooling system. This method involves using a pressure test adapter to pressurize the system, making it easier to spot any escaping coolant. Addressing leaks promptly is essential to prevent further engine damage, so if the problem persists or seems complex, don’t hesitate to consult a professional for a more detailed diagnosis and repair. By following this structured approach, you can effectively manage coolant leaks and maintain your vehicle's performance.
When tackling the issue of a coolant leak in your Buick Regal, it's essential to understand the common problems that can arise within the cooling system. Over time, components such as the radiator, hoses, and thermostat housing can wear down, leading to leaks. A cracked radiator or worn hose connectors are frequent culprits, often resulting in visible puddles of coolant beneath your vehicle. Additionally, a blown head gasket can cause significant coolant loss and may present symptoms like overheating or white smoke from the exhaust. Regular inspections of these components can help you catch issues early, preventing more severe damage and costly repairs. If you notice any signs of a leak, such as a decrease in coolant levels or unusual engine temperatures, it's crucial to address the problem promptly. While temporary fixes like radiator sealants can provide a short-term solution, they should not replace a thorough inspection and repair by a professional mechanic when necessary. By being proactive and informed about these common problems, you can maintain the health of your Buick Regal's cooling system and ensure its longevity.
Addressing a coolant leak in your Buick Regal is not just a matter of convenience; it is a critical safety concern that requires immediate attention. Ignoring a coolant leak can lead to severe overheating, which may cause catastrophic engine damage and costly repairs. The presence of colorful puddles beneath your vehicle is a clear indicator of a leak, and if left unchecked, it can escalate into a more serious problem, such as a broken radiator or a failed water pump. Additionally, the toxic nature of coolant poses a risk to pets and children, making it imperative to resolve any leaks promptly. The urgency is further underscored by the dangers associated with the cooling system's high pressure; removing the surge tank cap while the system is hot can result in explosive boiling, leading to serious injuries. Therefore, if you notice any signs of a coolant leak, it is essential to act quickly to safeguard both your vehicle and the well-being of those around you.
See what others are asking about their Buick Regal. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other Buick Regal drivers like you.