Water in my oil, where to start.

[jdblya]

Hello All,

Little background info so everyone knows my basics.

I own a 1995 Fourwinns 195 Sundowner.

Ford Volve-Penta 5.0fi 302 engine

GLM Exhaust Manifolds w/4" Risers

VP Sx Cobra Drive

Fresh Water use.

I have owned this boat for about 5 years now with no problems at all.

2 years ago I replaced my old exhaust manifolds with GLM Manifolds w/4 risers(don't know if this means anything, just am giving as much info as I have)


I used this boat all season, and everything seems to run fine, never gets hot, etc.

I just went to change the oil in it to get ready to put it away for the season, and was unhappily surprised to see cofee-ish oil come out of it. Great, all sorts of water in the oil.

Knowing that nothing will change, I put some new oil in and ran it again with the muffs for a few mins, and drained it again. Same thing.

Then engie runs fine, ran fine all summer for me. The only "issue" I had with it was early in the season, I was beached with some friends, and decided I was too impatient to push the boat off, so I was going to reverse myself out. Sortly after I find that the boat starts running very hot, so I pull it off the water and take a look to see that there was a bunch of rocks, etc jammed in the t-stat and in some of the hoses. I flushed it all out, and replaced the t-stat. No problems again for the rest of the season. The engine has always run cool since I've had it, usualy 120-140 on my gauge.

I am trying to get some ideas. I really have not worked on boat engines much, but I have lots of garage car experience. I am going to start taking it apart this weekend, and planned to remove the upper and lower intakes to see if I see anything real obvious, and next the heads I guess. I am thinking that I may have blown a head gasket or possible cracked a head when it did get hot.

I was always wondering about the exhaust manifolds/risers. If they got to hot from lack of water when it was clogged, could a jacket break and allow water to enter the engine somehow? I'm not really sure how it would, but I've heard about leaking risers in the past.

Any suggestions or ideas from the boat guru's out there would be greatly appreciated. I rather head in the right direction than do all sorts of extra work.

Thank you in advance!

John

 

[Bondo]

Re: Water in my oil, where to start.

and was unhappily surprised to see cofee-ish oil come out of it. Great, all sorts of water in the oil.
Knowing that nothing will change, I put some new oil in and ran it again with the muffs for a few mins, and drained it again. Same thing.

Ayuh,.... So just how Over-filled was it,..??

Refilling,+ running a few minutes only washs out what maybe remaining,+ doesn't necessarily mean it's Dumping water into the oil...

We need to define Exactly what you've got going on,...
Before you tear Anything down...
You don't want to be limiting your diagnostic potential by ripping it apart...

Btw,....

Welcome Aboard....

 

[achris]

Re: Water in my oil, where to start.

My experience with 'after-market' manifolds and elbows is that they last about 1/2 the time OEMs do (that's why they're cheaper). Sounds very much like you have a leaky manifold or elbow and it needs to be pressure tested, with a view to replacement.

HTH

Chris........

 

[JustJason]

Re: Water in my oil, where to start.

hmmm.... i'd start by pulling the plugs and see if any off them are severly off color... or have rust on them. if none of them do i'd be looking at the intake manifold first.

 

[jdblya]

Re: Water in my oil, where to start.

I started it and ran it for about 5 min or so. It does not seem like originally there was a ton of water in the oil. I was draining it into a a 15qt pan that was about half full or so already, and it did'nt over flow or anything. I would say there as a quart or so of water? Hard to be positive. I don't think it is dumping major water, or else that thing would be full, but it is enough that the oil no longer looks like oil =)

I don't think that these manifolds would be worn out or anything, they are not that old, but again, can someone explain how a leaking riser or manifold would actually get water into the oil? I would think any water would run into the combustion chamber, which would intern be burt or expelled back into the manifold?

And thanks for the welcome and quick responses.

 

[achris]

Re: Water in my oil, where to start.

I started it and ran it for about 5 min or so. It does not seem like originally there was a ton of water in the oil. I was draining it into a a 15qt pan that was about half full or so already, and it did'nt over flow or anything. I would say there as a quart or so of water? Hard to be positive. I don't think it is dumping major water, or else that thing would be full, but it is enough that the oil no longer looks like oil =)

I don't think that these manifolds would be worn out or anything, they are not that old, but again, can someone explain how a leaking riser or manifold would actually get water into the oil? I would think any water would run into the combustion chamber, which would intern be burt or expelled back into the manifold?

And thanks for the welcome and quick responses.

Leaking manifold/elbow will not allow water into the engine until it is shut down. The water then runs into a cylinder with an open exhaust valve. The water then runs down the side of the piston, past the rings and into the oil in the sump. The next time the engine is fired up the oil pump picks up the water and does an excellent job of mixing it with the oil. Milkshake!

Chris.......

 

[chiefalen]

Re: Water in my oil, where to start.

All those rocks and stuff that jammed your t-stat,you think some blocked up your risers also?

And than after all the use during the summer and pressure one cracked inside?

You been keeping a eye on the engine oil all summer?

Every time on i get on the boat i check the oil.

And you just discovered the milky oil?

Pull the plugs and see what plugs look rusty, hopefully it's just one riser went.

And after your done with the motor, you will need a new impeller and housing.

Maybe you got stuff up there too.

 

[jdblya]

Re: Water in my oil, where to start.

I will take a look at the plugs tonight.

And about the oil, I check it all the time on the dip stick, and the lik looked clean on the stick, even when I looked at it after finding the milk, so I am not sure how long it has been like that.

 

[Bondo]

Re: Water in my oil, where to start.

2 years ago I replaced my old exhaust manifolds with GLM Manifolds

Ayuh,....

Just for alittle Reseach reading,...
Have a look at My experince with GLM manifolds,.... I'm guessing you're having the Same ssue...

 

[jdblya]

Re: Water in my oil, where to start.

! So I checked the plugs, one side is wet. Took the riser off, sure enough water in the manifold, and rotted/rusted gasket and metal material between the exhaust and water ports on the manifold. Very happy (kinda) to see this.

Now, next question is. Does someone make a premium or higher quality riser gasket than the graphite metal thing that came with this? and second, can I get away with machining the risers and cleaning up the manifold so I don't have to remove the manifolds?

Thanks guys!

 

[Bondo]

Re: Water in my oil, where to start.

Does someone make a premium or higher quality riser gasket than the graphite metal thing that came with this? and second, can I get away with machining the risers and cleaning up the manifold so I don't have to remove the manifolds?

Ayuh,...

The Graphite based gaskets from Mercruiser are the Best, in My mind....
And,...
Nope,....
The Problem isn't the Riser,... The Manifolds aren't Flat, they need machining or replacement...