Water in oil!

[360ssoto]

Hey guys,
3.0 Liter OMC cobra, took out on the water, bogged down when in full throttle and smoke coming from oil intake at the top of the engine. Looked inside and there was water in the oil.. Boat would troll just fine. At one point if I eased up to full throttle, it would go on a plane... Any ideas?

 

[HT32BSX115]

Re: Water in oil!

Hey guys,
3.0 Liter OMC cobra, took out on the water, bogged down when in full throttle and smoke coming from oil intake at the top of the engine. Looked inside and there was water in the oil.. Boat would troll just fine. At one point if I eased up to full throttle, it would go on a plane... Any ideas?

Howdy,

Sure. You have a cracked block. When the water pressure from the raw water pump increases and the engine is warmed up the crack gets bigger and allows water to flow into the crank case......Spring must be a little early this year.......you'll see a LOT of messages like this for the next few months......

Time to consider a replacement engine or long block.

Before you do that however, pressure check the block to determine where the leak is.

Have a look at the "Stickys" below, (at the top of the forum message list)

[h=3][/h][h=3]Sticky: MUST HAVE Technical Information for DIYers.[/h]
[h=3]Sticky: ------------ADULTs ONLY -------------------------No Exceptions-----[/h]

Cheers,


Rick

 

[tpenfield]

Re: Water in oil!

Yes, water in the oil is usually a sign of a cracked block or manifold . . . and as Rick said, it is also a sign of Spring time !!!

Best thing would be to start looking at the engine. Cooling system pressure test could be proof-positive and save some looking.

 

[360ssoto]

Re: Water in oil!

Yes, water in the oil is usually a sign of a cracked block or manifold . . . and as Rick said, it is also a sign of Spring time !!!

Best thing would be to start looking at the engine. Cooling system pressure test could be proof-positive and save some looking.

Is there anyway to do a "summer fix"? Dont have the money at this point to buy a new engine. I have access to a welder and grinder and all of that.

 

[360ssoto]

Re: Water in oil!

and could it possibly be the exhaust manifold? I'm about ready to tear it apart piece by piece.

 

[Bondo]

Re: Water in oil!

Ayuh,.... How High, Over-full is the oil level on the dipstick,..??

 

[HT32BSX115]

Re: Water in oil!

and could it possibly be the exhaust manifold? I'm about ready to tear it apart piece by piece.

Exhaust manifolds don't really have a path to the oil sump.

This is the reason for the pressure check.

Also, checking how high the oil supply is overfilled can tell you how much water is actually IN the sump.

A little bit of oil/water emulsion at the oil fill is sometimes the result of condensation and not really a cause for concern.

A LOT of oil at the bottom of the sump after a run on the water, ALWAYS indicates a steady stream of water entering the oil supply from a leak somewhere............ If the engine wasn't properly winterized, that "somewhere" is usually an internal crack in the cast iron block.

Is there anyway to do a "summer fix"? Dont have the money at this point to buy a new engine. I have access to a welder and grinder and all of that.

Let me also add that while this can sometimes work with external cracks, it's pretty much impossible for the average person to make it work on an internal crack.

If your oil level is significantly higher than normal (or higher after a run around the lake) PRESSURE CHECK THE COOLING SYSTEM. If it's leaking (and you'll hear it hissing internally and externally if there's cracks.)

You'll find the crack

 

[tpenfield]

Re: Water in oil!

Is there anyway to do a "summer fix"? Dont have the money at this point to buy a new engine. I have access to a welder and grinder and all of that.

I suppose if you wait until summer and then fix it then, you could call it a summer fix :noidea:

Sort of depends on the damage and extent, which you do not know at this point.

 

[360ssoto]

Re: Water in oil!

I suppose if you wait until summer and then fix it then, you could call it a summer fix :noidea:

Sort of depends on the damage and extent, which you do not know at this point.

The weird thing is the dipstick is in normal range and there is no water on the dipstick... I'm going to drain the oil tomorrow to see if any of the oil got in through to the crank case

 

[RogersJetboat454]

Re: Water in oil!

The weird thing is the dipstick is in normal range and there is no water on the dipstick... I'm going to drain the oil tomorrow to see if any of the oil got in through to the crank case

If it's in the normal range, and hasn't gone up since you checked it last, chances are the water you're seeing may just be from condensation, and will eventually burn out of the oil.

Cross your fingers anyway, and keep an eye on your oil level.

 

[Bondo]

Re: Water in oil!

Hey guys,
3.0 Liter OMC cobra, took out on the water, bogged down when in full throttle and smoke coming from oil intake at the top of the engine. Looked inside and there was water in the oil.. Boat would troll just fine. At one point if I eased up to full throttle, it would go on a plane... Any ideas?

The weird thing is the dipstick is in normal range and there is no water on the dipstick... I'm going to drain the oil tomorrow to see if any of the oil got in through to the crank case

Ayuh,.... In that case, Rebuild the Carb, so's it'll run right....

The fuel delivery system is boogered up, somewhere, 'n it Sounds like the Carb...

The water yer seein' is condensation...

 

[WIMUSKY]

Re: Water in oil!

Check your plugs and see if one is burning different from the others. If you have water in the oil it could be a bad head gasket.

I'm with Bond-o, sounding more like the carb needs a once over......