I just bought a car from a dealership (2013 Accord 2.4L) and I noticed today that there was sand residue near and around the engine. I was changing spark plugs today and also noticed dry powerdy sand when I lifted the engine cover. Should I be worried that It was a flood car? There were no other signs of a flood damage and the title was clean with one previous owner. Could it just be dirt?
This is the spark plug covers: