Great pic of an area on these engines l dont understand. Usually the raw water is injected in the upper exhaust elbow just where it slopes down away from the engine. But 3126 has the water injected before the exhaust pipe rises up and right next to the turbo where it looks like the whole section should get flooded.
It doesnt so what am I misunderstanding?
it fills the riser and the riser has enough of a downward slope as it dumps into the first rubber hose section that it doesn’t backflow into the turbine. There’s also a fair amount of pressure coming out of the exhaust at all RPMs, including idle, that combat any backflow.
the joint to the turbine housing is dry, so raw water never touches the turbine, which is cooled by engine coolant (right side of the pic)
this is an upside down picture but they call it a shower head where the raw water dumps into the exhaust
That being said, the guys at boatdiesel said to periodically check my brand new turbo’s turbine side because the old one had evidence of corrosion which destroyed the wastegate. The fix would be to increase the angle to the exhaust tube to create more slope but I’ve never read any other 410 owners reporting water reversion on the 3100 series
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