Water in oil and coming out manifold

[Tractorsforlife84]

I just purchased a 51 cub from the owner of one of my hay properties. The tractor has been in the barn for 6+ years. I offered to buy it and picked it up for $650. The coil was bad and all 4 tires old and flat. Got it home (used a lager tractor and slings to gently load it). Turned the engine over after checking oil which was dark, but no water in it. I even drained a bit before to check. The radiator was empty at this point. I purchased the correct coil and rewired everything due to animals chewing on the wires. Rebuilt the carb, filed the points, added just water to the engine, and primed the oil pump. I planned on flushing the radiator and dropping the oil pan once I got the tractor running anyway. The tractor fired right up. It ran a bit rough, which I expected at first. Then I noticed water coming from the bottom of the manifold. I shut it off and checked the oil. Now I have chocolate milk for oil and water coming from places it shouldn't. This feels like more than just a head gasket. Has anyone else had this happen?

[inairam]

The block could be cracked but I would flush everything oil and coolant and redo the test before I did anything major. The oil and water in the pan could have seperated and you just mixed it up. Water will build up in the oil just from condensate and humidity from sitting.

There is a small condensate hole on the bottom of the manifold was the water coming from that or a crack somewhere?

[Eugene]

I would flush everything oil and coolant and redo the test before I did anything major.

Remove spark plugs, crank engine over, see if any moisture exits the engine. Condition of spark plugs? Also compression tests.

This should tell if you have a head gasket fault.

[ricky racer]

If you pressurize the cooling system, (very low pressure) that will tell you if you've got a cracked block or bad head gasket. If it drops pressure, you may be able to listen for leak (remove the spark plugs) and determine where it's leaking.

[Clemsonfor]

. The oil and water in the pan could have seperated and you just mixed it up. Water will build up in the oil just from condensate and humidity from sitting.

?

I doubt this since he said he even pulled the plug and drained some of the oil to make sure. Sóunds like he was looking for water knowing it would separate and collect at the bottom of the pan .

[inairam]

I still think it is worth studying some more before your pull a head

[Tractorsforlife84]

I appreciate all of the input, I believe the water was coming from the hole in the bottom of the manifold. I plan to pull the plugs and see if water comes out of a cylinder. I am definitely hesitant to pull the head at the moment until I have a full day to devote to it. My plugs looked fantastic before I got the tractor started. I haven't been able to pull them again due to the weather. I don't have room in the shop at the moment. I will do a compression test as quickly as I can. Basically, I'm trying to decide if I should put aside other stuff to get this back up and going or tarp it until I can get it in the shop. I also like the idea on lightly pressure testing the cooling system. You all have definitely raised my spirits. This seems to be a wonderful community. This tractor was meant to be a working tribute to a friend who taught me alot about tractors. He passed a few years ago, but he taught me the most by having me run, maintain, and show one of his cubs. I'll keep you all posted and I'm sure I'll need more advice.

[Glen]

Hi,
The Cub service manual says a Cub engine has 120 lbs of compression. That is probably for a new engine.
Some less is ok, they have said on here 90 lbs or above is ok.

Here is info for doing a compression test, if you need it.
Open the throttle fully to do the compression test, so the engine can get air.
Have all 4 spark plugs out of the engine at the same time.
Charge the battery fully before the test, and use the starter.

Normally, if the compression test shows low numbers, before doing all the work of a rebuild to the engine, you could try an oil additive.
But your engine may have a bad head gasket, or other problem.

They say on here to put Seafoam oil additive in the engine oil.
They sell it at auto parts stores.
Several people on here that used it said that it helped a lot.
They say on here to make the engine work while using the additive.
If the piston rings are stuck, it can help free them.

One of the experts on here said to use the additive for 2 oil change periods.
The 1955 Cub operator's manual says to change the oil every 150 hours of use.
If the rings are wornout, the Seafoam won't help much.

It's normal for some water to come out the small hole made in the bottom of the exhaust part of the manifold, when the engine is running and cold, or partly warmed up.

[Gary Dotson]

Pull the plugs and crank it over, a few times. If it’s as bad as you initially said, it should blow water out.

[Tractorsforlife84]

I finally got caught up and am going to make room in the shop tomorrow. Will pull the plugs first thing. I put the battery on the charger before coming in this evening. Will try to take a look at everything tomorrow evening.