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2005 SX230HO Milky Oil

kjr6306

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Went to do an oil change and found milky oil in the right engine. Drained all the oil via the rear drain plug and getting ready to add new oil and filter. Been reading through a million threads on this issue and need to start troubleshooting. All the plugs looked good and had uniform coloring so don't suspect water is getting into the combustion chamber. Going to do a compression check shortly but wanted to get this thread started and see the recommended order of items to check obviously from easiest fix to the hardest. After reading the threads I am suspecting the exhaust manifold issue. Is it possible to remove the right engine exhaust manifold with the engine in the boat? Is there a write-up on the procedure posted? Any help is greatly appreciated.
 

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After the oil change did it get milky again?
 

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kjr6306

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I'm trying to mentally figure out how a leak in the exhaust manifold can get water into the oil?? If the leak is in the combustion chamber, the water would instantly turn into steam. I guess theoretically there is the possibility that the water could be sucked in on the intake stroke and make its way into the intake manifold and back into the cylinder head. Is this even possible as it's the only way I can think that it could happen?
 

kjr6306

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After the oil change did it get milky again?
I believe so. I completely drained all the oil from the drain plug at the bottom of the engine with the boat tilted back to get it all out. Then ran the engine for about 10 minutes on the hose and the oil is already milky.
 

Cambo

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The water can get past the rings and into the oil . This is a picture of a breached water jacket on the exhaust manifold . The other likely culprit could be a cracked head. Have you had any steam coming out of the pisser hole at idle if so that could lead in the direction of the exhaust manifold breach. To pull the manifold on the starboard motor you most likely need to remove it.


exh2.jpg
 
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kjr6306

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I am going to try and pull the manifold without removing the engine. I will update later today. I am still perplexed how a quart of water can get past the rings. If it's a minor amount of water it would turn to stream and actually increase the CR of the cylinder. If more water gets into the cylinder it would hydrolock the engine and most likely break a connecting rod.
 

Cambo

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I am still perplexed how a quart of water can get past the rings
How did you determine it was a quart? If you did the oil drain from the back of the motor you get more oil out. If you had an extra court of fluid it that motor it would puke out the breather hose and be all over the air filter, pooled up in the air filter box and spill out into the engine bay. Those motors are very sensitive to oil levels

You may be able to check for a breach without unbolting the exhaust manifold. Try a smoke test pull all the spark plugs create a series of tubes that can fit snugly in all four spark plug holes maybe from a garden hose splitter. Take a length of garden hose get a smoke bomb let the smoke fill the hose have a compressor ready set at 10psi blow the smoke in as you turn the motor over have someone watch the pee hole for smoke . You may want to remove the thermostat to allow max flow to the pee holes. Those manifolds are a real pain to unbolt and almost impossible to realign with the engine in place.

1656009782769.png




1656010235577.png
 

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Brad_Ct

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Seal #31 is also a known issue with milky oil.E702627A-89B3-49ED-9D67-0D8BFDE0522E.png
 

Cambo

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If somehow you manage to get the exhaust manifold off you will be at that part listed above thats how much needs to be removed to get those pieces off it looks like a few bolts and they pull off not the case . They used loctite on all the bolts as well . Keep us posted a few oil coolers leaked this could be checked with a pressure test.
 

kjr6306

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Well, I spent the afternoon trying to pull the manifold. That didn't go well....lol. Pulling the engine tomorrow. Like the OP mentioned, it's impossible to get off.
With regards to how much water was in the oil, the oil level on the dipstick with the engine cold was at the top of the stick. Essentially the oil cooler reservoir was full. Normally a cold engine on mine just barely makes a mark of oil on the stick so whatever the reservoir holds is how much water was in the engine. There were some signs of oil in the air filter compartment so it was being blown up and getting into the airbox.
 

kjr6306

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The engine is out and the manifold is off. Everything looks good, no corrosion on the head or manifolds. No cracks on either side of the head. I wish I would have found something wrong so I can start fixing it instead of still looking for an issue. Posting a few photos. I drained the last of the oil from the drain plug. As you can see, there's definitely water getting in the engine. I just did an oil change after draining from the plug and had only run the engine for 10 minutes on the hose..... I'm going to do some research on pulling the oil cooler and pressure checking it. The only suspect item I did see was the rubber gasket connecting the 2 sections of the exhaust together. The gasket was dry rotted and there was a 1/4 inch tear in it.
 

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