While checking the valley hose, there's also a range of other hoses not to be ignored. My 2013 doesn't have the valley hose (different turbo cooling system to the '14 up), but at the last major service (100km) mechanic inspected all the hoses while it was in the air. Found EGR coolant hose and the oil cooler return hose had very minor crusting at the clamps, so minor in fact that no trails had formed. He replaced them and showed me the old oil cooler hose which had a 20mm split inside, not visible on the outside but ready to blow - LUCKY.
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MY13 GC Laredo CRD - gone but not forgotten
MY23 Skoda Octavia MKIV wagon - fully loaded
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