What kind of damage can water in the engine cause From driving through deep puddles as my engine is now misfiring on a 2004 GMC Sierra six cylinder 4.3 Vortec Engine?
Well....Seeing how this happened to me a month ago I'll give you
a heads up. Worst case you could've bent a connecting rod
(Hydraulic Lock-Up), or maybe sucked enough water (mists of water)
through the air intake to thin out the oil to a point where you
spun a bearing, or you even could've bent a valve. BUT... Driving
through puddles isn't a big deal. Calling roadside assistants from
the middle of a river is.