If your motorbike is still throwing out coolant despite the cooling system having been repaired recently, it could indicate a potential issue. Here are a few possible reasons for this problem:
Improper repair: It's possible that the cooling system repair was not done correctly. For example, a hose clamp might not be tightened properly, causing coolant leaks. Double-check the repair work to ensure all connections are secure and that there are no visible signs of leaks.
Faulty radiator cap: The radiator cap plays a crucial role in maintaining the pressure within the cooling system. If the radiator cap is faulty or not sealing properly, it can lead to coolant leaks. Consider replacing the radiator cap to see if it resolves the issue.
Radiator damage: Inspect the radiator for any signs of damage, such as cracks or leaks. A damaged radiator may not effectively contain the coolant, resulting in leaks. If there are visible issues with the radiator, it might need to be repaired or replaced.
Head gasket failure: The head gasket seals the cylinder head to the engine block, preventing coolant and oil from mixing. If the head gasket is damaged or worn out, coolant can leak into the combustion chamber, leading to coolant being thrown out of the exhaust. Signs of head gasket failure include white smoke from the exhaust, milky oil, or overheating. A professional inspection is necessary to confirm this issue.
Engine overheating: If your engine is running excessively hot, it can cause the coolant to expand beyond the system's capacity, leading to coolant overflow or expulsion. This could be due to a malfunctioning cooling fan, a blocked radiator, a faulty thermostat, or other cooling system issues. Make sure the cooling system is functioning correctly and that all components are working properly.
Internal engine problems: In some cases, coolant may mix with the engine oil due to internal engine issues such as a cracked engine block, a damaged cylinder head, or a faulty water pump seal. This can result in the coolant being pushed out of the system. Such problems require professional diagnosis and repair.
It's recommended to have a qualified motorcycle mechanic inspect your bike to identify the specific cause of the coolant leakage. They can perform tests, pressure checks, and visual inspections to pinpoint the issue accurately and provide the necessary repairs.