The most effective way to remove oil from a radiator reservoir involves flushing the cooling system with a radiator oil remover. Here's a detailed step-by-step process:
Steps to Remove Oil from Your Radiator Reservoir
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Drain the Coolant: Begin by completely draining the existing coolant from your vehicle's cooling system. Refer to your vehicle's service manual for the proper procedure and drain plug location.
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Refill with Water and Oil Remover: Fill the cooling system with clean water. Then, add a dedicated radiator oil remover directly into the system, either through the radiator filler neck or the coolant expansion tank (reservoir). Follow the oil remover product's instructions for the correct amount to use.
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Replace Radiator Cap: Securely refit the radiator cap.
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Run the Engine: Start the engine and allow it to run until it reaches its normal operating temperature and the thermostat opens. This allows the coolant (water and oil remover mixture) to circulate throughout the entire cooling system.
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Continue Running: Once the thermostat has opened, continue running the engine for approximately 15 minutes. This circulating time allows the radiator oil remover to emulsify the oil, breaking it down and suspending it in the water.
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Drain the System Again: After the 15-minute run, turn off the engine and allow the cooling system to cool down. Once cool enough to safely handle, drain the water and emulsified oil mixture completely.
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Flush with Water (Repeat if Necessary): Refill the cooling system with clean water and run the engine again for a short period (5-10 minutes) to further flush out any remaining oil or residue. Drain this water. You might need to repeat this step multiple times until the drained water appears clean and free of oil.
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Refill with Coolant: Finally, refill the cooling system with the correct type and concentration of coolant recommended for your vehicle. Refer to your owner's manual or service manual for this information. Ensure you properly bleed the cooling system to remove any trapped air.
Important Considerations:
- Oil Source: Identifying the source of the oil contamination is crucial. Oil in the cooling system often indicates a serious problem, such as a blown head gasket or a cracked cylinder head, allowing oil to mix with the coolant. Repairing the underlying issue is essential after cleaning the cooling system.
- Product Instructions: Always carefully read and follow the instructions provided by the manufacturer of the radiator oil remover.
- Safety: Allow the engine to cool down completely before draining the cooling system to avoid burns. Wear appropriate safety gear, such as gloves and eye protection.
- Disposal: Dispose of the used coolant and oil mixture responsibly according to local regulations.
