"The engine has enough pressure when running to probably blow a hole in the exhaust piping, so a little water covering the exhaust pipe isn't going to do anything."

I'm pretty sure that’s not true... but if you'd like before I change my exhaust I’ll weld up the tips and see if it starts.... pretty damn sure it won't

if you think about it, a lot of the energy that pushed the exhaust out of the pipe is used up by the turbo, and if your at idle speeds going through water, there isn't that much force on the exhaust... and as soon and the pressure of the exhaust is out weighed by the weight of the water, the exhaust is going to stop flowing, and once that happens the engine is going to stop. I think the OM617 is bad a$$ but I doubt it breaks the laws of physics.

I bet if you talked to those cops, their van ran just fine after it was out of the water.

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