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Old 07-08-2018, 11:48 AM   #41
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Oil is out, was hell to pump this sludge cold.
One question, should I put an oil filter during rinse with new oil or it does not make any difference?
Removed old oil filter and was full of this grey old oil.

Ski, what is the rocker cover? The valve cover? No oil fill on it just 3 bolt to remove it.

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Old 07-08-2018, 11:52 AM   #42
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Help needed - oil became grey tacky, water mixed?

Here is a pic of the valve cover

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And oil filter and housing

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Old 07-08-2018, 11:56 AM   #43
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Just be sure to change the oil filter each time you change the oil. Any contaminated oil is still in the filter. Once you find the source of the water, drain again, change the filter and flush engine. Either use 1 qt. of diesel or "sea foam" the rest oil. Run the engine for say 20 min. Then repeat, drain, change filter, re-fill with oil, run engine and check the dip stick. It's important to run the engine for a while, that way any small amount of water will burn off. You MUST find the source of the problem first.
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Old 07-08-2018, 12:24 PM   #44
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Just drained the oil cooler
Oil has a strange color

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Old 07-08-2018, 01:05 PM   #45
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I have just dealt with a similar situation in a 17.5 kW diesel generator. Loss of coolant and oil turned greenish gray. Replaced head gasket and flushed oil three times. Stopped losing coolant but oil not clear. Replaced gear driven seawater pump and flushed a few more times. This fixed the problem but corrosion caused injection rack to be sticky so had to rebuild injection pump. 60 hours of run time since and so far so good.

A few key lessons that I hope help. Put new oil filter with every flush. The foamy oil in compartments and lifters etc did not come out with oil changes alone. Did one flush with half gallon of diesel fuel and rest oil ran 15 minutes idle then flush again. Then had to do injection pump and still saw foamy oil in crevasses. So did another flush with sea foam and ran 15 minutes to fully warmed. Immediately do another flush and run under load 1 hour then flush again.

You should look under valve cover to see if all foamed up after oil change. foam was like mayonnaise and would not go away without using diesel or sea foam. I constantly monitored oil pressure and did a compression test to make sure cylinders and valve seats were not damaged. I did do a valve job and had head pressure tested while off. So far gen is running well since. Hope this helps
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Old 07-08-2018, 01:20 PM   #46
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If you use diesel in your crankcase, be prepared for a runaway if the engine is older...something to stop the airflow.
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Old 07-08-2018, 01:22 PM   #47
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I won’t be able to find what I need to bypass the oil cooler today. Do you see any consequence if I keep this as is for today and do the oil flush next weekend after having got the fitting and hose I need?

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Old 07-08-2018, 01:32 PM   #48
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I would do oil change ASAP. The glycol is known to damage bearings. Change oil and filter and run it a few minutes to flush all high pressure passages and most importantly flush the main and rod bearings. I would not wait. Also, I would personally never use an internal engine stop leak. An internal leak must be fixed correctly. Way too much potential for expensive problem to arise.
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Old 07-08-2018, 02:57 PM   #49
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Oil pressure is much higher than raw water pressure, should be an oil slick , you'd think so.

Disconnecting the raw water connections to the cooler and run at idle seems worthwhile as a test. 40 psi should even with a crack or pin hole produce some oil dripping out eventually.

How does water go into the engine from an oil cooler seeing the pressure difference is so high? And then turning off motor, all pressures drop to zero fast.

Other idea is something cracked in the motor, in cars this would be a cracked head letting oil into the coolant, coolant could get into the motor as it is under pressure for some time after the motor is turned off by way of leaking into the cylinder, diesel cant tolerate much of that without catastrophic destruction. That is how one of my GM diesel cars engine grenaded, broken head bolts, head gasket leaked, it was consuming coolant, and on the highway, the crankshaft snapped and piston rods broke, pistons broke.

I read the GM 350 diesel not having a good fuel water separator, water in fuel caused big engine problem like that.
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Old 07-08-2018, 03:13 PM   #50
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There could have been an oil,slick that he didn't notice. When engine is shutdown oil pressure goes to zero pretty much immediately but cooling system stays pressurized for as much as hours or at least till the engine cools. Even with a very small leak, water could be injected into the oil side until enough leaves the cooling system to yield zero pressure.
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Old 07-08-2018, 03:23 PM   #51
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There could have been an oil,slick that he didn't notice. When engine is shutdown oil pressure goes to zero pretty much immediately but cooling system stays pressurized for as much as hours or at least till the engine cools. Even with a very small leak, water could be injected into the oil side until enough leaves the cooling system to yield zero pressure.
No, the raw water goes to zero almost immediately, unless your oil cooler is cooled on the FWC side of things, which I have no experience with. Mine and others I have seen the raw water side coming from the raw water pump is what runs through the oil coolers.. Which is why the mention of an oil slick, it is cooled with raw water, so that raw water exits the boat, and you see the oil slick.
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Old 07-08-2018, 03:57 PM   #52
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Lou, just do a regular oil change for now. Run engine at 1200 for a couple minutes and deal with the rest later. At some point take the three bolts off and remove rocker cover, but if you do not have enough time, understood.

That milky oil has likely been in there a while and another week should not be an issue. The oil is way cleaner now after this change.
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Old 07-08-2018, 04:57 PM   #53
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Lou, just do a regular oil change for now. Run engine at 1200 for a couple minutes and deal with the rest later. At some point take the three bolts off and remove rocker cover, but if you do not have enough time, understood.

That milky oil has likely been in there a while and another week should not be an issue. The oil is way cleaner now after this change.
Thank you Ski.
Tomorrow morning I will go to my nearby hydraulic hose to ask them to provide me with a hose to allow me to bypass the oil cooler. I measure fitting and looks like a 3/4 JIC/flare. I remove one hose and got it back home so the shop can give e the correct one right away without guessing. I will go back to the boat in the afternoon and put that hose in and refill oil and run the engine at the dock. Then redo oil change etc.

After second oil change I will remove the rocker cover and check. Is there a gasket to seal this cover? If yes does it need to be change when putting cover back on? Don't thin so but checking.

Stay tuned for more news tomorrow.

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Old 07-08-2018, 05:15 PM   #54
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Post 53, perfect way to get the correct hose/fittings. 3/4 SAE looks like JIC but they will not work
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Old 07-08-2018, 05:49 PM   #55
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Greetings,
Mr.L_t. Mr. Ski will correct me if I'm wrong but I think you only have to bypass the WATER side of the cooler. IF it is the cooler and it's leaking water into the oil, if there's no water in it (bypassed) you run no risk of further contamination plus you'll save the $$ for the oil bypass hose...unless you want such a hose. Just sayin'


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Old 07-08-2018, 06:14 PM   #56
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Greetings,
Mr.L_t. Mr. Ski will correct me if I'm wrong but I think you only have to bypass the WATER side of the cooler. IF it is the cooler and it's leaking water into the oil, if there's no water in it (bypassed) you run no risk of further contamination plus you'll save the $$ for the oil bypass hose...unless you want such a hose. Just sayin'


You are right my dear friend and as always you show me that the ree hide the forest in my mind . I could also totally remove that cooler from the equation and see. I am thinking also to take the opportunity to change the oil hoses while I have the hands in the dirt.
Something to note, when I removed the dirty oil I used a 10L can with manual pump. Usually when doing my oil change I am able to pump out around 5 to 6 liter from the pan and around 1L from the oil filter housing. Today with what I removed from pan and filter the can is almost full and I would say there is 8 to 9 L in it.
I think ( but may be totally wrong) that if coolant level dropped by 1 or 2 liter I would have noticed it immediately.

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Old 07-08-2018, 08:03 PM   #57
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you dont carry them as spares?


You should.
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Old 07-08-2018, 08:11 PM   #58
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you dont carry them as spares?


You should.
Carry what?

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Old 07-09-2018, 10:26 AM   #59
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Just got my bypass hose made, this has allowed me to find an hydraulic shop 5 min from home, at least there is something positive in the story!

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Will be back to the boat in few hours to finish the oil flush.

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Old 07-09-2018, 01:58 PM   #60
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Help needed - oil became grey tacky, water mixed?

Bypass is in place, oil filter changed and new oil is in, time to start the beast and cross fingers...

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