Warm water in bilge

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09-20-2021, 12:09 PM

#21

fbc25el

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

09-20-2021, 01:02 PM

#22

Griff

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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.

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09-20-2021, 01:05 PM

#23

nygman11

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That's a good idea.

09-20-2021, 01:08 PM

#24

ThisIsLivin

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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.

09-20-2021, 01:56 PM

#25

nygman11

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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.

09-20-2021, 01:58 PM

#26

Gimme Fuel

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Quote:

Originally Posted by Helmwurst

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.

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09-20-2021, 03:01 PM

#27

floridaoutlaw

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

09-20-2021, 05:02 PM

#28

bajaman

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Quote:

Originally Posted by nygman11

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.

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09-21-2021, 12:00 PM

#29

TomZ

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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.