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  #11  
Old 05-22-2006
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Oil Cooler

There isn't any oil cooler in this engine as I understand it.

Stephane
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  #12  
Old 05-22-2006
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Ah ha, then that wouldn't be the problem...

good luck...

Phil
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  #13  
Old 05-23-2006
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Research...My Universal 5411 engine has water in the oil but I can't find any cracks

After doing some research, this article is the closest I have found that matches the problem I have:

==============
My Universal 5411 engine has water in the oil but I can't find any cracks in the head, manifold or block liner. Where else could the water be leaking into the oil?

Universal 5411 engines were raw-water-cooled, and so salt water gradually corroded the inside of the engine water jackets during the life of the engine. The first engines had a bolted-on blocking plate made from cast iron (on engines up to serial number 300072 part number #299363, on engines after serial number 300072 part number #299751) located over the water jacket port in the front of the block near the timing gears, that often rusted through... letting water leak into the timing chest and down into the oil pan. Later 5411 engines were fitted with a stainless steel blocking plate which can be retro-fitted to older engines (part number #301755). [Later fresh-water-cooled engines use a pressed-in frost plug instead of a blocking plate.] Check this plate in your engine to make sure it is not the source of the water leak (usually there is a corroded stain under the plate showing the path of the salt water down into the pan. If that's not the problem you'll have to pressure test the block with water or air to find the leak. You could also get it magnafluxed (magnetic crack checking) to see if you can find a crack which is causing the leak, but often cracks are inside water jackets and very hard to detect.

====================

I believe I will know very soon if this is the problem by removing the engine and opening the crank case to look inside...

Stephane

Last edited by stef9; 05-23-2006 at 02:58 AM.
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Old 05-23-2006
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Before you go to all that trouble, isolate and pressurize the water pump. If the seals, etc. in the water pump have 'gone' then its quite plausible that the water pump is leaking *into* the crankcase.

Block the exit of the pump, apply pressure (and a pressure gage) to the inlet .... pressurize to a ~ 10psi, close the pressurization valve ..... and watch for the 'decay' of pressure .... indicating that the pump is leaking internally into the crankcase. You can remove the pump from the engine and do this test on a workbench.
I dont have that much experience with the 5411 ('the Pisser') but leaking water pump shaft seals is the usual first place to look when there is water in the crankcase .... then all the 'other stuff'.

If you recently 'pickled' the engine with acid (a relatively bad idea, better to use an organic commercial boiiler descaler that doesnt EAT / dissolve the base metal) perhaps you bored a hole through a 'weak spot' in the internal casting of the block .... I sure hope not.

Evalute the pump first ... its probably the highest probability of cause and easiest to fix.

hope this helps.
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Yes, saddly I have removed the water pump from the equation already.

Stephane
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Old 05-23-2006
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Did you properly torque down the head? Correct ft/lbs and tightening pattern?

I don't know your skills so I apologize if I am insulting your intelligence.
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Old 05-23-2006
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Yes, I have verified that the water couldn't go from the water passage ways to the oil's through the head gasket I built to stop any flow of liquid between the head and the block.

Stephane
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Old 11-10-2010
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water leaking in oil universal 5411

Hi Stef, looks like I am in about the same spot as you were back in 2006 with my 5411. Can you tell me where you found the leak. I am guessing the water jacket blocking plate at the front of the engine behind the gear case cover or a freeze out plug at the rear by the flywheel. Sure would like to know what you found when you took the thing apart.
Cheers, Greg. gregbasso"at"aol.com
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Old 11-10-2010
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Gregbasso,

Welcome to SailNet!

You'll find a LOT of great info and experience here. However, it is considered bad form to resurrect old dead posts.... Do you realize that Stephane's post is 4Ĺ years old?

Might I suggest starting a new post with specific information about your specific engine and the symptoms that you are experiencing?
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Old 11-10-2010
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form and soggy bread

Not quite sure I agree with you about the quality of 'form'. However, I do agree with my grandmother who once told me...'if you don't cast your bread upon the water....you won't even get back soggy bread.
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