Water in cylinders, milky oil, no power 3.0L

[logran]

Hi guys, here's my problem. I have a 1995 Four Winns Freedom 170 with the 3.0L OMC/Volvo engine. My problem started out as no WOT RPM's. Fuel vent line was obstructed, fixed that...anti siphon valve had, of all things, a bee in it...fixed that...changed fuel filters flapper valve had fallen out completely but was still at the bottom of the exhaust...fished it out, still OK, reinstalled with new mounting kit, replaced dist. cap and rotor, new plugs, reinstalled riser elbow. Ran worse than before everything was looked over/repaired/replaced. Pulled plugs, noticed a little wet (water). Cranked engine over and could see water spraying from plug holes. Checked oil, a little milky looking (chocolate milk more like) and maybe a half inch high on oil level (changed oil prior to using this season, been used maybe 3 or 4 times). Checked compression, great compression on all cylinders. Could it possibly be a bad intake/exhaust manifold (original) or am I looking at possibly a head, head gasket or worse Any advise or knowledge would be much appreciated.

 

[Maclin]

Re: Water in cylinders, leaky oil, no power 3.0L

Re: Water in cylinders, leaky oil, no power 3.0L

Do a compression check, that will show bad rings or valves or head gasket or holed piston. If compression is good then the head gasket is good (and so is all that other stuff).

Water in the cylinders is most likely from bad exhaust manifolds or riser or riser joint gasketing. It goes into open exhaust valves. Given enough time that water can end up in the crank case. Also given enough time that water can begin the rusting process inside the cylinder on rings and valves, whereever.

 

[danond]

Re: Water in cylinders, leaky oil, no power 3.0L

Re: Water in cylinders, leaky oil, no power 3.0L

Drain your cooling system, plug the hose going to the exhaust manifold, and put 15psi of compressed air into the system. On my 4.3 I had to buy a bunch of adapters and a valve from the local hardware store to get it done. See if you can hear air leaking anywhere. If not, you (probably) have a screwed up exhaust manifold, which could be a riser issue or something leaking from the exhaust into the cylinder

 

[logran]

Re: Water in cylinders, milky oil, no power 3.0L

Compression was 160-170psi across the board. I have yet to do the pressure check of the intake. Could I possibly have just not gotten the riser/elbow sealed correctly? Would RTV sealant be acceptable in addition to the paper type gasket or is just paper gasket material recommended? I'm used to car engines so this whole I/O cooling system is a little perplexing to me. Maybe I'll get lucky and it will just be intake gaskets or a head gasket...I'll take that over cracked head or block anytime...or bad intakes for that matter. Thanks in advance

 

[joseph.signore]

Re: Water in cylinders, milky oil, no power 3.0L

Cracked Head... I just went thru the same issue.

Good Luck.

 

[freak007]

Re: Water in cylinders, milky oil, no power 3.0L

compression check is good, therefore your head, headgasket, block, pistons, and rings are good...

sounds like a cooling system pressure check is next

 

[logran]

Re: Water in cylinders, milky oil, no power 3.0L

So, let me make sure I have the cooling system pressure check right. Drain intake, disconnect cooling lines from intake, block off one end, apply 15psi of pressure to the other, listen for air leaks. When Im listening for leaks, what exactly am I listening for as far as a an internal leak is concerned? Gasket leaks I get, it's the internal cooling workings that I don't understand as well.

I would assume, although maybe I'm wrong, that with good compressions that I dont have a cracked block, head or head gasket, but I'm not 100% sure of that. I would think that if a head gasket is blown out between a water jacket and the valves I could still get good compression and that would explain my water being ingested and squirting out the spark plug holes. Does that sound reasonable? or even possible? Either way, please let me know about the intake pressure check.

Thanks in advance.