'96 4.3 quit running, splattered oil..help

[bruceb58]

Re: '96 4.3 quit running, splattered oil..help

Don?t stop suddenly. LOL

As long as he doesn't turn his motor off at the same time he stops suddenly, he wouldn't have a problem anyway.

So... he should tear it down and pressure check the block?

Do you understand that there is no tearing down of the motor required to pressure test the cooling system right?

 

[joewithaboat]

Re: '96 4.3 quit running, splattered oil..help

As long as he doesn't turn his motor off at the same time he stops suddenly, he wouldn't have a problem anyway.

Don't you mean turn off the engine.... not the motor
you started it, nit picker

 

[bruceb58]

Re: '96 4.3 quit running, splattered oil..help

Don't you mean turn off the engine.... not the motor
you started it, nit picker

Whatever you say joe.

 

[joewithaboat]

Re: '96 4.3 quit running, splattered oil..help

As long as he doesn't turn his motor off at the same time he stops suddenly, he wouldn't have a problem anyway.

Do you understand that there is no tearing down of the motor required to pressure test the cooling system right?

Yes i understand how to pressure test! But to be clear, in post #32 you said

"He's got a knock because he either has too much water in the oil or something is damaged. The knock is the secondary issue here and needs to be taken up with after the block has been pressure tested. "

 

[bruceb58]

Re: '96 4.3 quit running, splattered oil..help

If he has a cracked block, he is not going to need to worry about a knock.

You said "Tear it down and pressure test the block". So what did you mean by that?

 

[joewithaboat]

Re: '96 4.3 quit running, splattered oil..help

He's got a knock because he either has too much water in the oil or something is damaged. The knock is the secondary issue here and needs to be taken up with after the block has been pressure tested.

you said this not me ???

 

[Maxum21]

Re: '96 4.3 quit running, splattered oil..help

thanks for the replies..i really appreciate all your guys advice and input...i'm probably going to bring it to a marina because this is getting over my head now..i'm not a mechanic. i guess i need to let a pro take a look. i cant find anywhere on this motor where water would be getting in after doing several tests as suggested and its getting confusing. if there was a crack somewhere, wouldnt water still get in the block/oil while running on muffs? i'm not talking about a minute or 2, but prob around an hour altogether while doing these oil flushes. On the lake, the water got into the engine very quickly, spitting oil everywhere. that wouldnt seem like a tiny crack..or at least its a large enough crack that would be noticable while running on muffs? right? the oil level has not risen while motor is running since the day of the incident..its getting over my head now..thankyou everyone for the help..i learned alot of helpful info

Jamie

 

[joewithaboat]

Re: '96 4.3 quit running, splattered oil..help

Jamie,
Good luck, let us know how it turns out.
Joe

 

[Technorunner]

Re: '96 4.3 quit running, splattered oil..help

if you are coming from a plane and the shuters are bad. In my opinion the water could be in the EM without getting in to the engine as long as you dont shut it of. That water will flush out if you rev the engine so you get more flow on the exhaust. BUT if you shut it down it will come in to the cylinders and drain down to the oil past the compressionrings. this will take diffrent amount of time depending on the engine health.

We had a 3.0 mercruiser that we got water in the oil. The head gasket was bad so we assumed that was it. We pressurized EM, cyl head and riser. We assambled it after cleaning the engine. We then ran it with muffs for like 30 min no water in the oil we launced the boat. after 10 min in the water it started to come in to the oil again. when the water dident have any pressure on the way out it dident penetrate the cylinder wall. But in the Sea it got a little more pressure in the system and a small rust crack behind the water pump passed the water in to the bottom of cyl one below the piston. So running it on muffs arent a completly sure card. Launch it and run it in water to se if you get water in the oil. if you do then take the engine out. But thats my opinion

 

[bruceb58]

Re: '96 4.3 quit running, splattered oil..help

The problem with only running it on muffs is that there is no way you are going to get the block to the temperature to what it is running under load. It is under load at which this increased temperature where a crack can open up and water get into the crankcase.

While the engine is running there is no way that water is going to make its way back up the exhaust into the cylinders....no way...no how. If it did make it that far, the engine would likely stop. On the other hand, if the engine was immediately turned off, and/or you have a leaky riser/manifold junction, you could potentially get a few ounces of water on top of a cylinder. If this amount of water happened to leak through the rings, it is still probably not enough to cause enough oil level rise to blow through the valve breathers. If there is a milkshake spewed over the top of the engine as the OP describes, there is a lot of water in the crankcase. There is really only one thing that can cause that.