Water has gotten into crankcase and Oil

[RobH2]

Better than punching a new hole or forgetting to open a thruhull. Really not more complex than the manifold water injector.

Just curious, what do you find complex about it?

[joe_db]

I was just going to dig up some hose and a small thru hull from my shed instead of fabricating a way to re-inject the water into the exhaust system. I would put the thru-hull next to the three I already have for bilge pumps. There is no forgetting issue, none of them have valves on them.
YMMV

[RobH2]

Understood, no problem...

What some might call a complex solution I might be inclined to call an elegant solution. It's all about perspective, right?

[roadnsky]

Hi Rob-
One possible "issue" I see is that your internal water hose could cause enough of a blockage to be a bigger problem than the "solution".

I like your drawing tho...

[RobH2]

Sure Jerry, I realize that. The drawing is just conceptual. I think that it could be designed to have a negligable impact on the exhaust. Like any mechanical or hydraulic system, test, refine, test.

[joe_db]

A friend of mine did something similar. He plumbed his sink and HEAD outlets into the exhaust. The visuals alone are

[roadnsky]

...The visuals alone are

Not to mention the "burning" smell as well.

[ndutton]

The critical dynamic is you want the vent to allow air into the water hose without any encumbrance when the hose has a vacuum. Everything else is managing water. For the sake of the engine's performance, no good can come from adding exhaust flow restriction.

[RobH2]

I just wanted to wrap up and say that my engine is running very well. Thanks again for all of the outstanding support from you knowledgable guys.

I've run the engine now for about 5 hours and the oil is as clear as if I just poured it in. I guess that comes from having changed it about 15 times during my odyssey. You should see my "oil bill"...lol... I've never had completely clean oil in the engine as you well know, it's near impossible to get it all out during a change. I think that every other year or so I might just do a triple change just to get it all good and clean.

Again, THANK YOU to all...

[capnward]

watch water pump seals after installing a new impeller

I am one of those who got milky oil in the crankcase from blown seals on the flange pump. I was afraid I needed a new head gasket, but the compression test was good. I thought maybe water was coming into the engine from the copper water jacket exhaust having corroded internally, but I was informed that would put water into the cylinders, a hydro-lock would result, and the engine would not run. I could see no water on the plugs, and the engine ran ok. I thought there was internal leaking in the block and/or manifold, but when I pressurized them with my lung power I heard no air escape, and the pressure remained while my eyes bulged out. I didn't believe it was possible for enough water to push past both the water and oil seals on the pump, and past the drain holes of the pump, to contaminate the crankcase oil. But somehow it did. The problem began after replacing a 2 year old impeller which looked ok, if a little bent. The engine ran hotter than before, and was not running well until warmed up, but it wasn't until I did the 50-hour oil change that I discovered milky oil. When I removed the pump, the oil seal looked like it was covered in vanilla milk shake. I had the pump rebuild kit from Moyer ready to go, and replaced seals, shaft, bearings, impeller, and O-ring. The shaft was badly scored at the failed seals, and the bearing at the water side of the pump was hard to turn. I had done the same repair four years ago, also after a new impeller had been installed. That time, water did not get into the crankcase, but the engine overheated when a lot of water came out the drain holes.The pump is 9 years old and has had two rebuilds. I do use the engine a lot. After 3 oil changes all is well.

[RobH2]

Thanks for posting that. Yea, I still don't know where my water got in. I replaced so many things that I had no way to tell anymore. Fortunately, I haven't had the problem since. My strong suspicion is that the plastic anti-siphon valve clogged on my exhast water injection loop and I sucked water into the manifold from the exhaust.

But, since I replaced so many things, I now know that it's unlikely to happen again from any other failure.

[Dave Neptune]

After my second "plastic vented loop" the second time I went manual. I literally mounted a 1/8" ball valve at the vent and it worked as well as I worked it for a few years. When I replumbed I went to a bronze unit mounted higher in the boat.

This was early in my A-4 experience and I used it for about 5~6 years.. Forgot once on the back side of Catalina. I sucked the water off the bottom and was on my way. I did change the oil when I got back to port and it was already clear.

Dave Neptune