Final answer:
To clean oiled foam elements, pre-rinse with a suitable solvent like a mild detergent or dry-cleaning solvent, then wash in soapy water, rinse thoroughly, and allow to dry completely before re-oiling and reinstalling.
Step-by-step explanation:
Oiled foam elements, commonly found in the air filters of vehicles, should be cleaned carefully to ensure they continue to function properly. The cleaning process involves a few steps to remove trapped dirt and contaminants. First, remove the oiled foam element from the vehicle and gently squeeze out any excess oil. Then, pre-rinse the element using a solvent that is appropriate for breaking down the oil; common choices include a mild detergent or a dry-cleaning solvent. Apply the solvent and gently work it into the foam to break down the oil and grime, then rinse thoroughly with water. After the solvent treatment, wash the foam element in a mixture of warm water and detergent, gently squeezing to remove dirt until the water runs clear. Rinse it one last time to remove any detergent residue.
It is crucial to let the foam element dry completely before re-oiling and reinstalling it. Re-oiling is essential because the oil catches particulates and ensures the filtration system works effectively. Remember to avoid the use of petroleum-based cleaners or any harsh chemicals that might damage the foam material. Also, consider environmental safety when disposing of used cleaning solvents, opting for methods that minimize harm to the ecosystem.