Confused water in oil problem

[dan2744]

Hi all, I have an issue that I have never had with massive amount of water in oil. I just purchased a 1994 Chaparral 225 with a Volvo 5.0 fi and volvo drive. I got it at home and ran it on muffs and it started right up and ran fine. I Checked the oil, the level was fine and looked good. So I took it to the lake to test and immediately the temp started to rise. So I pulled the hose going into thermostat housing and no water was pumping at all. So I figured it needed an impeller and I got it home and installed it the next day. Sure enough, the impeller was done. When changing the impeller I noticed the block was still full of anti freeze from winterization. There was no circulation in the motor at all. The weird thing was is that I checked the oil again and it was almost 3 quarts high and milky. So I changed oil and filter twice and have been running it on muffs and not able to get water in oil again. Its running fine, cooling system working and no issues, at least in driveway.

So my question is, how can I get water in oil if there is no water pumping thru system? I did notice white smoke coming from exhaust when I was testing on the water. Is it possible that I roasted the flappers and it got in that way? Sorry for the long post, I wanted to be detailed as possible. Any help is greatly appreciated.

 

[alldodge]

I would suspect the motor is damaged due to improper winterization.
First started on the hose and it didn't run long enough to get hot.
Place in the water and under load it heats up fast.

This is the reason it still had some antifreeze in the block.

Bought from a dealer or private?

 

[dan2744]

I bought private. It starts and seems to run fine with impeller change. I haven't had chance to get out again. It was a lot of water in the oil. But it's not taking on water right now at all. I let it run for about 45 minutes to see if I could get water in there again. Oil level and color stayed the same. After I got back from lake the first time, I took impeller hoses and back flushed. Can you get water in there by running water thru those hoses? Do oil coolers allow water to get in?

 

[dan2744]

The weird part is that the block was full of antifreeze, it didn't pump any water from the lake. But it somehow got about 3 quarts of water in the oil. I pumped out 2.5 gallons of water oil from the pan.

 

[alldodge]

Oil pressure is at least 20 psi at idle and maybe 50 psi or so at higher rpms. Water pressure is no more the 5 psi at idle and can get up to maybe 25 psi at higher rpms. So oil will leak to water, but not the other way in a cooler

 

[dan2744]

Thanks for the response. I'm gonna have to tear the motor down. A 302 block and heads shouldn't be to hard to find for a replacement.

 

[Bondo]

Thanks for the response. I'm gonna have to tear the motor down. A 302 block and heads shouldn't be to hard to find for a replacement.

Ayuh,..... Atleast run it in the lake again, 'n see what happens,.....

If ya get water again, drain, 'n pressurize the coolin' passages to find the leak,....

 

[dan2744]

I let it idle again and it won't even reach 100 degrees. I thought gauge might be malfunctioning so I used my laser pointer heat gun and its been idling for 20 minutes at 97 and 98 degrees. So I checked thermostat and its stuck open. Can that cause condensation in crank case if ran for long period of time?

 

[alldodge]

Not going to see any kind of condensation which would raise the oil level. Doubt you would see any

 

[Bondo]

Ayuh,..... Runnin' it on the wagon, or in a slip is pretty meaningless,..... Ya gotta Run it out on the water,....

 

[dan2744]

Yea, I gotta run it. Thanks for the responses guys. I'll run it and see what I get.

 

[dan2744]

So I remember the previous owner telling me he thought he had fuel issues so he was messing with the fuel system because he had a bog and it was slow to plane. This boat has a computer and I think it would run rich if the motor never reached operating temp. I'm wondering if I don't have fuel in my oil. Its possible that its fuel and not water.

 

[alldodge]

Milky oil caused by water, fuel just thins the oil

 

[Scott Danforth]

check the firing order of the motor. many ford "302" motors were build with GT40 heads and the 351 cam

much of the fuel system on the mid 90's ford marine engines is no longer available.

 

[dan2744]

Thanks for the help guys. It seems water is getting in when the boat sits over night. If it stops raining for 5 minutes ill yank the manifolds off and look for a crack.

 

[dan2744]

I took it out, ran the crap out of it. It didn't overheat, it accelerated well and only reached 145 due to that was the only thermostat I had that would fit is a 145 degree thermostat from a former boat. I checked oil during the run and after, and there is no trace of water in the oil. Im happy but a little confused. Not sure how water ever got there but I trust the boat to take out the family for the holiday weekend. Thanks for the help and I hope you all have a great weekend.

 

[BRICH1260]

I`d just keep running it, albeit with frequent checks on the dipstick.