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Saw some too the other day and it is obviously a light leak, didn't really worry me much though. Not really a difficult fix, if that was the side of the block though I'd be alarmed.
Had the same problem with clamp ... During oil change in dealership was charged $ 20.00 for a home depot $ 2.00 basic clamp. DIY .... Not covered under warranty. SMH
2-5 min job, Get pliers to remove hose clamp, go to an auto part store and buy a manual adjusting hose clamp for like 2 bucks and put it on... Dont have to waste time going to dealer.