MX5100H Freeze Plug/Frost Plug that leads to oil pan

[BKvK]

Hello,

Long-time lurker, first-time poster...

I have been searching this forum for awhile and still cannot find a definitive answer.

And I know that I will have 'an answer' within minutes of posting

During the summer I managed to 'roll' the MX5100H (45 degree angle)

Ended up with oil on top of a piston. Pulled the cylinder head and cleaned everything up, however I replaced the coolant with water until I was certain that all problems were resolved.

Well, it went down to -13C for a day in November!

I 'obviously' "popped" a frost/freeze plug

Now, water added to the radiator goes STRAIGHT to oil pan (HIGH FLOW within seconds).

Everything that I have read to date, suggests a plug and not a crack.

Pulled the cylinder head and the 'leak' is below the gasket.

Where might I find the defective (or would that be EFFECTIVE) plug?

The DEEP FREEZE is ending on Monday 0C

So, you have lots of time to reply

Thank-you in advance,

BK

 

[coachgeo]

There has been mentions in here of freeze plug under the front engine cover in some models if I recall right.

maybe go to USA Kubota site or messics and look at parts break down of your engine in that area to see if you have one there too.

 

[eserv]

It is likely the plug in the front of the engine by number 1 cylinder

 

[eserv]

It is item 070 in this diagram, Part number 1522103390.

 

[BKvK]

Ask, and ye shall receive!!!

THANK-YOU!!

So... I need to remove the gear case cover.

Any tips or things to watch out for?

TIA

 

[eserv]

Ask, and ye shall receive!!!

THANK-YOU!!

So... I need to remove the gear case cover.

Any tips or things to watch out for?

TIA

Nothing to radical about working on that engine. You should purchase a service manual though because you will need to remove and replace the timing gears and they must be right!

 

[lugbolt]

Ask, and ye shall receive!!!

THANK-YOU!!

So... I need to remove the gear case cover.

Any tips or things to watch out for?

TIA

Yeah, pray that the plug is out of the front of the block behind the gearcase. If it's not, pull the pan and have a look up inside the block, specifically the bottom of the cylinders. Seen them break/crack right around the bottom.

TO get to the gearcase, you're going to have to remove the radiator and everything associated with it. Not too bad on those. The lower pulley will have to come off and that can be a bear. I think it's a 46mm nut and good luck finding a socket that's deep enough. I used an ATV axle nut socket which is really deep, about 7" if I remember right.

 

[kuboman]

Sure hope its a frost plug! I would prepare for the worst. Very seldom do frost plugs actually save the block.

 

[D2Cat]

This is the freeze plug on the back of the block on an L2050. They work at least sometimes.

 

[BKvK]

It is likely the plug in the front of the engine by number 1 cylinder

THANK YOU ED!!

A direct, no-nonsense reply like yours is VERY MUCH appreciated.

I can literally hear the water flow through the plug that you mentioned.

The visual aid was GREAT!!

Silly me, expecting it to be labelled "frost" or "freeze"...

Next time I visit Frog Lake, dinner is on me!

BK

 

[D2Cat]

Be sure to get the plug from a Kubota dealer. Don't guess you can get one at the local parts store. There is too much detail work, and the price is insignificant to not get the specific one.

Depending on the diameter, find a socket or piece of round tubing that is near the same OD and drive it in squarely. Have the outside edge about 1/16" inch inside the block casting when done.

Always be careful of what's behind the plug and how far back it is. You don't want to do drill or pound the plug too far in, to cause a restriction.

The plug leaking shouldn't be too difficult to remove. Usually a vice-grip will grab the edge that has moved out.