Jet Boat Junkie
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- Port Saint Lucie, Florida
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That is probably the case. As a new owner, 12 years ago, more than just salt water entered the cooling system.I was trying to word it carefully, as "cooling water pressure when connected to a municipal water supply".
To my very simple mind stronger pisser stream indicates higher cooling water pressure in the system. That stream is always significantly "stronger" when running at WOT as compared to running on a hose.
Sorry, I forgot now the exact reason for those statements but in general I would think you have salt (aluminum oxide) build up in your cooling passages restricting cooling water circulation that over time created enough obstruction to cause secondary issues.
(Chemically speaking, most salt compounds are not water soluble, or barely, and do not taste like kitchen "salt", btw.)
Thanks for the heads up on the salt. I will not season any vegetables with it.
Regarding the build up in the cylinder block water jackets: A lot of it was loose, collecting on both sides of the head gasket, which by the way is a series of small circular holes with 2 elongated holes on either end. The water jackets in the cylinder block were especially plugged around cylinder #1. I actually had to chisel out the build up using a small screw driver and various shaped pics. All of the cooling water for the cylinder block water jackets comes in the two hoses on the exhaust side of the cylinder block between cylinders #3 and #4 (closer to #4 and far from #1) . The flush path out of the cylinder block water jackets is up through the head gasket into the cylinder head and out through the cooling water pipe. That seems like a pretty tall order for any sediment that may enter the cooling system, whatever it's composition.
Incidentally, the bottom of the cylinder water jackets is where lot of the members have experienced cracked blocks. I wonder if there is any correlation?
I still do not know how this relates to "Milky oil." A leak-down test is next.