Offshoreonly.com - Warm water in bilge

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Offshoreonly.com (https://www.offshoreonly.com/forums/)

- General Q & A (https://www.offshoreonly.com/forums/general-q-20/)

- - Warm water in bilge (https://www.offshoreonly.com/forums/general-q/373398-warm-water-bilge.html)

fbc25el

09-20-2021 12:09 PM

Crud in the water end of the oil cooler causing the pressure to rise and push water past a hose clamp?

Griff

09-20-2021 01:02 PM

I would lay some sheets of cardboard on the bilge floor and do a very brief run to get the water pressure up. The cardboard will make it easy to see where the water is coming from.

nygman11

09-20-2021 01:05 PM

That's a good idea.

ThisIsLivin

09-20-2021 01:08 PM

Try thread sealant on block drains, check the intake gasket at the rear, check the weep hole on the circulation pumps. Buy a bore scope camera from Harbor Freight to inspect areas you can't see easily.

nygman11

09-20-2021 01:56 PM

Camera ordered will be in tomorrow. I will check all of the areas you and the other posts mentioned. Last but not least will be the cardboard run.

Gimme Fuel

09-20-2021 01:58 PM

Quote:

Originally Posted by Helmwurst (Post 4806249)

Check you exhaust hoses and clamps. Sometime they will leak at higher pressure/RPM's. Seen it more than one. Had the same symptoms on my own boat, chased that water in the bilge issue. Took a mirror and went around all the exhaust hoses and clamps. One was not even all the way around. loosened it up and moved it even, water leak gone. Rechecked a couple of weeks later and it was about 1 turn loose. .

I just put EMI manifolds on mine, had a small leak when fired up on hose. Hose clamp wasn't loose either. The hose clamp had sliced the hose, when I wiggled hose leak increased. Trimmed an inch off and re-clamped. Issue solved.

Id go through an wiggle/check every hose connection. Likely a similar issue, especially if warm water.

floridaoutlaw

09-20-2021 03:01 PM

If you have sea strainer try putting RED food color inside the sea strainer.
That will show you where it it ........

bajaman

09-20-2021 05:02 PM

Quote:

Originally Posted by nygman11 (Post 4806224)

If you are asking about the ones in the exhaust manifolds I just changed the exhaust system last year to stainless marine thinking the stock cast iron manifolds had a crack in them but I still have the same amount of water coming in. Is there other drains I am not seeing?

Being not familiar with that engine I just was going by what a 454 has, which is a drain petcock on each side of the block plus one for each side of the exhaust, sometimes an oil cooler or power steering cooler, Cool Fuel, etc.

TomZ	09-21-2021 12:00 PM

As others have mentioned, look at the block. High water pressure on a 502 can cause the head gaskets to leak to the of the block. My 502s also pegged the water pressure meter at higher rpm and speed.

Hoping it's just a hose leaking. Let us know what you find.

nygman11

09-21-2021 01:27 PM

Do you mean to the back of the block?

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