Hi, i buy nu first gtx 230 this summer and when i wash IT after a sea rude i put water in the flush hole without a hose but i didn t start the engine.
I let 3-4 seconds the water. I need to change the oil?
Three or four seconds in my opinion no damage done but you might have got some water in your exhaust. Couple of hose clamps and straps pull it out and drain the water.