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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Shooting Water in an Engine to Remove Carbon?

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MCL

03-13-2007 18:03:11




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I still have the miss in the 1550 diesel. No I haven't done anything with it yet. I have found out it is number 1 cylinder. One time I heard an old Oliver mechanic tell someone to spray water right out of the garden hose into the intake manifold while it is running. This will soften up and dispose of any built up carbon in the cylinder that might be causing a valve to stick open. Anybody out there heard of this or tried it?

I am trying to eliminate easy things first before I start tearing things apart. It is in the shop now. I am taking the tank off first to clean out whatever is plugging the outlet. (Darn) thing quit on me in the barnlot today because it starved for fuel. At least I got done cleaning the pig lot first.

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Brian Decatur co. Ia

03-16-2007 17:24:38




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to MCL, 03-13-2007 18:03:11  
About 10 years ago I worked for a Ford dealer that had a walnut shell blaster. It was a Rotunda (Ford branded) tool. The intended use was to remove carbon from the back side of the intake valve. Fuel detergents have come a long way since then. I work in a Chevy dealer now and we don't have anything like it nor have I seen a need for one anymore. Running water in the intake of a running engine is a bad idea. In the case of a Northstar Caddy, it would have to be pretty tired or neglected to use enough oil to carbon up. Most of the time the folks that buy them can afford to keep them up. GM most definitely does NOT endorse the "water repair" and your friend should know better that to do that. Do the job correctly. Remove the head and find out what is wrong.

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kwg020

03-15-2007 18:59:55




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to MCL, 03-13-2007 18:03:11  
Walnut shells used be used to clean turbine engines but I think it's a thing of the past. kwg



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rrlund

03-14-2007 09:57:25




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to MCL, 03-13-2007 18:03:11  
One other thing that I thought of. Snap-On or somebody made a machine,I think it was called a MotorVac or some such thing. It used crushed walnut shells to take the carbon out of an engine. They were hard and abrasive enough to break out the carbon,but the leftovers would burn. There must be one of those around somewhere.



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MCL

03-14-2007 04:34:27




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to MCL, 03-13-2007 18:03:11  
Well this has been educational. Guess it's time to start taking stuff apart. I can't deal with this anymore. I just know as soon as this thing is torn apart I am going to need it for something.



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Kruse

03-13-2007 18:58:08




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to MCL, 03-13-2007 18:03:11  
Never, never, NEVER do this to a diesel engine. A gasoline engine is okay.....but you have to be real careful. Also, if there is a miss in the engine it will do no good. The carbon has to be red hot for the cold water to loosen it up. On an gas engine that has a miss the carbon will not be hot in the non-firing cylinder. Plus, like was previously mentioned, this is a good way to bend a rod or break a piston. Remember that liquid cannot be compressed and if you get too much water in the rising piston..... well, just think about it for a minute.

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J Schwiebert

03-13-2007 18:14:46




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to MCL, 03-13-2007 18:03:11  
Come on here, you want to bend a rod here? Yes we used to do that with the first 1800 A gas tractors because of poor fuel but you used a squirt oil can. Now, Did you pull the injector and swap it? Did you pull the manifold and see what the smoke looks like? It is the exhaust that is sticking, what are you using for oil? How much is going over the front rocker arm to see if you are getting enough oil to the valve to keep it from sticking? do you have a bad valve spring? In almost 40 years that spring may have become week?

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rrlund

03-14-2007 07:28:08




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to J Schwiebert, 03-13-2007 18:14:46  
Interesting story for you John,when my son was going to University of NW Ohio in Lima,they had an instructor who reved a V8 up to some high RPM and stuck a garden hose in the intake running at full flow. He said everybody was diving for cover,but the doggoned thing just sat there drinking it up.He said they all thought it would blow any time,but didn't. That's not to say that you would want to try it at a lower rpm,but at high speed,it must work.

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Kruse

03-14-2007 16:18:44




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to rrlund, 03-14-2007 07:28:08  
Sure. On a GASOLINE motor where the compression is much lower than a diesel. Remember that when the valves are closed and the piston is at top dead center, there is actually quite a bit of space between the piston and the combustion chamber in an ordinary gasoline motor. On a diesel there is very little.
I know a few Cadillac northstar mechanics who do this regularly to breakaway the carbon deposits. An interesting fact, though, is that you need to keep the Caddy motor revved when you do this because the incoming air goes down, back up and then down before it goes into the combustion chamber. If you add water with the engine at idle, the water will actually collect in the low part of the intake runner.
Anyone want to take a guess what happens to the motor when you then rev it up? (I"ll give you a clue. The dealership buys the customer a new motor)

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rrlund

03-15-2007 06:55:26




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to Kruse, 03-14-2007 16:18:44  
Yes,true enough. Just thought it was an interesting story. Some mechanics think I'm nuts telling that story.I've held the governor open on my 1550 gas and shot more water in it that you would think would be safe. Have you ever heard of that walnut shell thing?



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Kruse

03-15-2007 16:27:59




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 Re: Shooting Water in an Engine to Remove Carbon? in reply to rrlund, 03-15-2007 06:55:26  
I have not heard of that. Maybe I"m too old fashioned, but I try to keep all abrasions out of the cylinders.



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