If you've sucked up some water then you will have bent a rod - it's a very high compression engine! It's a clever car though and it can compensate pretty well for a bent rod!

Injectors don't really 'leak' as such, but they can smoke first thing for various reasons. If it's a load of smoke and sounds like a tractor, then it's one or more injectors. But if it puffs out a lungful of smoke and soon clears it's pointless tracking it down. I had brand new injectors, a new pump, rebuilt turbo, no EGR valve and it still smoked first thing!