Cub Engine Block Fitting

[Dthompso]

What is this fitting for on Cub Loboy ?

International Cub block fitting

[Jim Becker]

We have seen replacement blocks drilled for that fitting. I am not aware of anyone having one on an original tractor block. It must be for some weird non-tractor engine. What is your engine number (stamped) and engine block part number (cast in)? Both will be on the other side of the block (near the carburetor).

Engine number location:
http://www.tmtractor.com/id/id_003.htm

[wrz]

My 59 lo boy has the same hole with a standard pipe plug. What it is for I do not know. The one thing it could be used for is a temperature sensor or a block heater.
Wm

[wrz]

The engine serial number on my 59 is in line with others on Raymond's data base. The block has the added cast iron where the hole is threaded. The casting date of engine matches the rest of the tractor's parts. So it is not a replacement engine.
Wm

[Jim Becker]

Interesting. Does it have the usual part number or is it something weird?

[wrz]

My 59 lo boy serial number is 11434 and is entered in Raymond's data base which shows the engine serial number, part number and casting dates.
Wm

[john2189]

What comes out of it? Oil or water? Could it be a block heater?

[tnestell]

Goes into the water jacket. I use it for a temperature gauge. Works well. My engine is from a power unit. Guess it could be used for a block heater.

[Gary Dotson]

A block heater would be more effective mounted lower in the water jacket. It looks like the remains of a temp gauge in his pic. There has to be some clue in the casting #.

[Dthompso]

As you can see it looks like it has been leaking coolant. So far I haven’t been able to remove it. Cub is at farm shop. Serial # and casting # to come.

[tst]

I have had a few pass through my hands with it,

[Glen]

Hi,
The sender for temperature gauges on the tractors I have seen were all up high on the head, up where the engine gets the hottest.

The water circulates down through the radiator on a Cub. The water is the coldest at the bottom of the radiator, and in the lower part of the engine.

A water temperature sender should be up high on the head, near the upper water elbow, for a temp gauge. My opinion.

Try using a 6 sided socket to remove the part in your pic, a 12 sided socket might slip, and round the corners of the part.

[Jim Becker]

My 59 lo boy serial number is 11434 and is entered in Raymond's data base which shows the engine serial number, part number and casting dates.
Wm

That is strange. Your part number is the same as the usual engine block. The ones with this feature not only have the hole, but there is extra material that would have required a different casting.

[Dthompso]

Got fitting out finally. It was a temp probe. This is off an International Cub loboy, s/n 1378 J. Block casting no 5 4 V, stamped block # is 35574R4(for some reason the 4s are inverted)

[Matt Kirsch]

I had a '51 Cub that had a water temperature sensor brazed in that location. The gauges were trashed, but the fitting wasn't leaking so I snipped the capillary tube off near the fitting and pretended it wasn't there. Wasn't going to pull the pin on that grenade...