Milky oil?

[Gizzygone]

I didn’t have a great boat season this year... weather was crummy and I only got the boat out once!

Anyways; winter is on its way in, and I had to do a quick winterization tonight (freeze in the forecast).

I checked the oil when I first opened the bay, and it was fine...

I ran the motor for a minute or two to flush the exhaust (with antifreeze) then I fogged the cylinders.

Before buttoning it all up I checked the oil one more time to find a surprise: the oil had a chocolate milk look to it.

It had a fresh oil change this spring.... Any ideas?

 

[JPass]

Milky oil means you're getting water into the oil somehow. Maybe a bad oil cooler or head gasket? You said everything was fine before you winterized it. Maybe you did something wrong. At the very least you need to get the old oil and water out and flush the system a couple of times to get that watery mixture out otherwise you may be in for a surprise next season.

 

[Gizzygone]

That’s what I was afraid to hear.

Where is the oil cooler? I’ll start with that

 

[JPass]

Gonna need a little more info on your boat, but the oil cooler on my 2012 Challenger 210 is on the starboard side of the motor under the intake.

 

[Gizzygone]

2009 Challenger 180 with the supercharger.

I’m guessing it’s in a similar location... and also guessing that the cooler isn’t really accessible with the motor in place...

It almost looks as if the oil cooler is simply a pump rotating the oil to the cooling plate on the hull? Or does it circulate coolant?

 

[Gizzygone]

I’m curious if fogging the cylinders had anything to with the oil?

 

[JPass]

2009 Challenger 180 with the supercharger.

I’m guessing it’s in a similar location... and also guessing that the cooler isn’t really accessible with the motor in place...

It almost looks as if the oil cooler is simply a pump rotating the oil to the cooling plate on the hull? Or does it circulate coolant?

Cooler is accessible with motor in place.

Some videos to help you understand what's going on and how to test your oil cooler:

https://www.youtube.com/watch?v=Uw1evuOhK4k

https://www.youtube.com/watch?v=giv17zDyX88

https://www.youtube.com/watch?v=mQlnmwb0bCk

Hope these help.

 

[Gizzygone]

Cooler is accessible with motor in place.

Some videos to help you understand what's going on and how to test your oil cooler:

https://www.youtube.com/watch?v=Uw1evuOhK4k

https://www.youtube.com/watch?v=giv17zDyX88

https://www.youtube.com/watch?v=mQlnmwb0bCk

Hope these help.

Excellent; I’ll give those a watch tonight after work!