What is the first step in the process of removing an oil cooler?

The first step in the process of removing an oil cooler is to drain the coolant. This is essential because it prevents coolant from spilling or leaking during the removal process. By draining the coolant first, technicians can ensure a cleaner, safer working environment and avoid potential contamination of the oil system with coolant.

When coolant is not drained, it can lead to mess and difficulties when accessing the oil cooler. Additionally, certain components surrounding the oil cooler may become damaged if coolant spills, leading to more extensive repairs. Hence, starting the removal with draining the coolant is a logical and necessary procedure for proper maintenance and repair.