WATER OR FUEL IN OIL (OMC COBRA)

[Don S]

Re: WATER OR FUEL IN OIL (OMC COBRA)

What you should do if the boat sits that low, is to lower the drive and start the engine for a second, (at least crank it over), after you pull the boat from the water just to make sure there isn't any water in the cylinders.
Even with flappers installed, if the water level gets above the exhaust elbow, water will get into the engine. Those flappers only "Slow Down" waves coming at the stern. No way do they seal good enough to prevent any water getting in.
Just run it and keep an eye on it, and make sure there are no hydrolocs. If you don't have a hydroloc, you don't have water in the cylinders.

 

[Gary H NC]

Re: WATER OR FUEL IN OIL (OMC COBRA)

Many boats run without the flappers.Just don't go from wide open to a quick stop.That when the wake behind you pushes the water up the exhaust.

 

[cybor462]

Re: WATER OR FUEL IN OIL (OMC COBRA)

The boat sat over night after I ran it with muffs and the oil level was up about an 1 1/2" so this means water got in while not running. Its not in the river so the flapper is not an option. WHat else could it be? The exhaust riser? Water is held in there right? May have a crack and the water is leaking into the cyls? I am guessing. Anyone have a thought? (other than getting a pack of c4 and bury it in the river)

 

[bruceb58]

Re: WATER OR FUEL IN OIL (OMC COBRA)

Some water could leak into the cylinders from a leaky exhaust but seems unlikely that it would raise your oil level that much.

Did you pull the plugs to see if any water is in the cylinders? Did you check the oil level after you shut off the engine and before this morning?

Might be time to pressure test the block an/or pulling the manifold and riser to see if there are indications that water is leaking.

Had this boat been run in salt water before?

 

[cybor462]

Re: WATER OR FUEL IN OIL (OMC COBRA)

Yes I did check the oil after I ran it and the level was correct. After sitting over night the level had increased maybe an inch on the stick I would guess a quart higher.

I did not have a chance to pull the plugs as I was working but I plan on changing the oil tomorrow again and run it and check it. Let it sit and check the level again. I will also pull plugs to see. I will see if it starts hard as it always started right up before this. If it starts hard it would be an indication of water or wet cyls. There would be a trace in the cyl I am sure which would cause hard starting.

I have no idea if this boat was run in saltwater. Does not have any corrosion so my guess would be no.

If it is the exhaust can I get one and what do you think it would cost?

 

[marunr]

Re: WATER OR FUEL IN OIL (OMC COBRA)

Re-read Don S 1st post because it does not seem to be coming in through the exhaust, rather through the block or head gasket. ("That would leak water anytime there is water in the cooling system.")


Exhaust manifold and riser for this engine will run $500 to $600, but again, this doesn't sound like the problem.

 

[cybor462]

Re: WATER OR FUEL IN OIL (OMC COBRA)

I read Dons post but I do not totally agree. If the exhaust has an internal crack which slowly leaks in the cyls all night while sitting it would leak past the rings. By morning the water would more than likely be out of the manifold and would have leaked past the rings in to the oil. Of course we do not know the condition of the rings. If he is basing it on a good tight set he may be right. This engine is I guess the original whic makes it 17 years old. If the rings are well worn than It would not be a hydrolock as the water will have passed thru the rings and would not be in the cyls any longer. I agree with Don if I tried to start it 60 min. after I shut it down but I have never done that. It also would depend on how much of a leak it has as well. I am not saying I know it all but I feel this is a possibility. I changed the oil yet another time today and ran on the muffs for a half hour or so. The engine started in a half crank so there is nothing effecting that. I shut it down and let it sit 15 min and checked the oil and noted the amount on the stick. I checked it an hour later and it was up a little on the stick maybe 1/4 inch. I checked it again an hour later and it was up a good inch. I left it alone and will check it in the morning. If its up still I am sure of water getting in then it will be to determine where.

I am not sure I would blame the block first. I ran this boat maybe 6 hours or more before this problem started. I guess it may have just been its time to go. To pressure test it would it have to be removed?

 

[Reel Poor]

Re: WATER OR FUEL IN OIL (OMC COBRA)

Was there water in the oil that you drained out of the engine today? Should be obvious.

 

[marunr]

Re: WATER OR FUEL IN OIL (OMC COBRA)

It just doesn't seem that water could be leaking past the rings (enough to raise the level on the dipstick an inch) if the compression numbers you gave are correct.

 

[cybor462]

Re: WATER OR FUEL IN OIL (OMC COBRA)

Well a new twist. You know the saying "The further I go the more behind I become" ok no smart remarks but its true. Anyway I chened the oil and yes it was showing water but not as much as the first change. I ran it yesterday and cheked the oil a few minutes after shutting it off allowing time to let the oil drain back. The oil was clean and was full. I started checking the oil in few hour intervals and the level slowly creeped up. I checked it today and it is still clean but the level has increased an inch max. So I decided to pull off the filter not chnge the oil again just the filter and the filter did not have any oil in it. It was heavy so the oil did go thru it but normally on auto engines when you pull the filter you have a full filter worth of oil (my wifes car has the 2.3 Ford engine) which has a filters worth of oil in when you pull it. Now could this be where I am getting my extra quart of oil. After sitting all night the oil is draining out of the filter back into the block? This would account for the increase in oil level. I guess it would take a few changes to get rid of all the water go in the crankcase. I may have just taken on water the last time out either putting in or out an or coming plane too quick. That may be the only water I actuallt took on. Does anyone know about the 4 cyl 2.3 Ford and whether this marine version filter drains out into the block? Boy I hope so.

 

[cybor462]

Re: WATER OR FUEL IN OIL (OMC COBRA)

I found my problem! Look at my other post titled "How to test water temp when gauge in question". It is the not very pretty answer I really did not want to see!

 

[TOMMYO8]

Re: WATER OR FUEL IN OIL (OMC COBRA)

hello i am new to this site this is my first time ever visiting it i have water in my oil aslo i bought this candia 200 fourwinns got told boat has no problems well the first time i went out i had no problem the second time i went out and came back home checked the oil BAM water in it so i changed the oil and went back out then BAM wate again so i took off heads had block checked guess what it was cracked so i replaced it with another went to lunati bought a voodoo cam with a little thump not very much just a little replacede all gaskets waterpump etc. went to the lake first time motor ran like a scrmpied sewing machine sounds like it needs to be in a mustang going down the drag strip lol lol i love it then went out with new motor again and what the heck WATER IN THE OIL MOTOR OVERHEATED could it be i didnt let the head gaskets not seal to the motor enough b-4 i hammered down on it you know when you have a motor that sounds like this one you kinda cant help it i have no thermostat in it, i removed the flappers due to the first engine overheating it has a raw water system in it when i hook it up with muffs at home water is pushing trought foot so hard it cant help but stay cool mabye hose from out drive crimped not letting new water pump pull water in not real sure any help would be greatly appreciated i have way way to much money in this engine to ruin it thanks

 

[TOMMYO8]

Re: WATER OR FUEL IN OIL (OMC COBRA)

i am new to this i have anew motor in my boat 5.0 ford omc new cam from lunati new water pump new gaskets no stat took flappers out cause they were bad from previous motor over heating and block cracked the man i bought boat from didnt winterize it and somehow forgot to tell me he didnt winterize it so i had some issues with it any way i have this new motor sounds like it needs to be in a mustang going down a 8th of a mile drag strip lol lol i love it mabye i did let gaskets seal to motor before i hammered down or possibly the hose from the out drivee to the motor is crimped not allowiing enough water in unless u have the muffs on with the garden hose pushing pressure now when you idle in water at the lake it over heats you go full throttle it runs about 150 but the minute you stop bam gets hot hot hot 190 plus any help thanks tommy

 

[Don S]

Re: WATER OR FUEL IN OIL (OMC COBRA)

First off, Welcome to iboats.
If you have a question, start a new thread. when you post at the bottom of a long 2 year old post, no one will see it after a couple of replies.