5.7 water in engine oil

[peanutbay1]

Re: 5.7 water in engine oil

I have another question. By running the boat hard versus a 30 min session on the muffs are you thinking that something blows by under extreme load?? If so would you still be thinking a cracked block?? and I would also be curious if any one has an opinion about preexisting water in the oil that I never new about as a possibility??

 

[Maclin]

Re: 5.7 water in engine oil

You just want the engine to get to operating temp under load for an extended period of time. On the muffs will not get it to that point. You want the block to be stressed everywhich way mainly to open up all the clearances and let the new oil in and get hot and flush it all out. You need it to run that way for a good 15-20 minutes (30 is better) to get all the byproducts "boiled" out of the oil.

At this point I would not be worried about a cracked block, although it could show up after a true run on the lake. You will find out one way or another....

 

[peanutbay1]

Re: 5.7 water in engine oil

As always a BIG THANK YOU to all who have offered their advise with this problem. I will run the boat on sunday and post the results next monday.

 

[peanutbay1]

Re: 5.7 water in engine oil (UPDATE)

Re: 5.7 water in engine oil (UPDATE)

OK guys I ran the boat this sunday and here is the update:

I checked the oil level before we unloaded and made note of it. We launched the boat and ran 15 minutes at 3000rpm. I stopped and checked in the valve covers and milky oil. I pulled the dipstick and clear oil with just a haze of milk. During the run I watched the gauges. 60psi oil pressure and here is the biggee.. 100 degrees temp. Now everybody save their keystrokes as I understand it could be the gauge or the sending unit rather than true temp. Here is what you must know. In my driveway last week the boat would run 150-160 degrees on the hose of which I did for almost 2 hours and I had zero water in the oil. I now launch in 60 degree lake water and my reading is barley 100 degrees. Could my temperature of the engine be that cold that I am causing condensation in the engine???? Here is the other part of the story...the oil level never rose during the rest of the day. I ran the boat for 15 minute intervals keeping a close eye on the gauges. I wanted to see if I could cook off any residual water in the engine. The oil never became severly milky and get this.. I get home in the afternoon pull the dipstick and golden honey?? I then run the engine to warm it up and change the oil. This batch compared to my last batch is just slightly hazed versus milky. And the amount of oil removed was exactly correct. So after all this update information let me list my main questions;

1) can my motor run that cold that it condensates inside the engine??
2) the oil is less containminated than last week so am I cooking of water??
3) any other recomendations???

HELP!!!!

 

[Maclin]

Re: 5.7 water in engine oil

Yes, an engine can run too cool to get rid of condensation on a short run. I am not sure what you are looking at in the valve covers, but any thick pasty sludge in there will not just go away by running it. Drain the oil again and look at it, if there is an internal coolant leak it will look contaminated again. If not then it is probably time to take the valve covers off and clean them and any thing else that has collected and stored the sludge.

 

[peanutbay1]

Re: 5.7 water in engine oil

Its not sludge in the valve covers. Its truely a thin milky oil. As soon as I changed the oil it did just like last time the valves are clean as a whistle and covered with honey colored oil. We have never found the thick whip cream like sludge that you typically find. This sucks because the engine runs perfect and I just cant beleive we have a cracked block with no level rise in the oil. It just seems like minor contamination.....

 

[bruceb58]

Re: 5.7 water in engine oil

You should probably check your thermostat to see if it is opening too soon or stuck open. Also, check the actual temp with an IR heat gun.

If you really want to determine if you have a cracked block or not, you need to pressurize the cooling system.

 

[Knightgang]

Re: 5.7 water in engine oil

Don't rule out simple things. It sould be condensation that builds up in the block, or it could be a crack in the intake manifold water passage. I have an Oldsmobile that lost the intake manifold and the crankcase filled with coolant and the oil went milky. No water got into cylinders. Changed the intake gasket, put engine back together and fiiled with new oil and coolant, no problems since...

 

[hoppyumr]

Re: 5.7 water in engine oil

I'm having the same problem with one of my 5.7Gsi volvo engines with water in the oil. Does anyone know if saltwater eats through the water passages in an engine block. I just bought the boat, and can't speak for the previous owner's care of the engines. I have however had to replace all 4 exhaust manifolds, and all 4 risers, and have one set of heads completely redone replacing all the valves. Since I've had the heads off, I've obviously replaced the head gaskets with new felpro marine gaskets, and replaced the intake manifold gaskets. Based on the shape of the intake manifold gasket noted when I was removing the heads, and the rust trails inside the top of the engine, I'd say it was leaking on the right side towards the bottom of the passageway. Have you checked gaskets? I'm thinking I need to check mine again. I just don't want to believe the block is shot, because I don't want to pull it...

The engines have approximately 350 hours, and the boat is about 10 years old. If I had to guess, I'd bet the engines weren't flushed after being used.

You mentioned you bought it in Maryland. Was it used in saltwater like mine? I'm just curious if we have a similar problem