Final answer:
It is crucial to inspect crankcase breather lines for ice to ensure proper ventilation and prevent pressure buildup, which can cause engine damage. Regular maintenance, similar to comprehensive cleanings for AC systems, can mitigate costly repairs and severe problems.
Step-by-step explanation:
Why is it a good idea to visually inspect to make sure that the crankcase breather lines are free of ice? The primary reason for ensuring that the crankcase breather lines are ice-free is to maintain proper ventilation of the crankcase. In cold weather, moisture can condensate and freeze within these lines, potentially leading to a buildup of pressure inside the crankcase. This buildup can cause engine seals to leak or even result in gasket failures. A proper inspection mitigates the risk of these issues, which can lead to costly repairs and downtime.
In a broader context, such as in the example of the smoking brakes, visible problems like ice in the breather lines are a form of evidence highlighting potential mechanical issues that could translate into heat or other types of damage. In the case of smoked brakes, it's the heat created by friction due to improper functioning. Proper maintenance and inspections can help prevent more severe problems by catching early signs of malfunction, such as in the practice adopted by the store with the air conditioning system which underwent comprehensive cleaning and regular maintenance to prevent further issues.