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Join Date: Sep 2005
Location: New Westminster, BC
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Re: Exhaust Manifold Flooding with Cooling Water
You have it right.. how long it would take depends on the length of the exhaust run, the volume of the waterlift, and how much water your RWC pump actually moves through the system. 30 seconds seems a reasonable average time at which point your should probably be a little concerned about it.
In point of fact the water will continue to be pushed out while you're cranking, but it's when you stop cranking the water buildup (could be up to the height of the loop just before the exhaust) will run back due to gravity and equalization, possibly finding an open exhaust valve through which to fill your cylinder. Trying to compress incompressible water leads to 'hydrolock'.. ie the motor can't turn through the compression stroke if water's in the cylinder.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)