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Help needed with Kubota engine

A

Anonymous-0

Well-known Member
I have a V1902 4 cylinder Kubota in my skid steer. I brought into the city to clear snow on Friday and everything was good. I started it today and after about 20 minutes went out to use it. The heater hoses weren't even warm, I revved it up a bit and all of a sudden there was steam everywhere. It's not the rad/heater hoses or block heater coming out but it's leaking coolant from somewhere at the back of the engine on the flywheel end. Of course it's at the end under the seat that's hard to get at. I"m hoping someone might have an idea what's wrong. I loaded it on the trailer because it's supposed to get real cold and I don't have a shop. I'll have to take it to a repair shop on Monday I guess. I had to drive back out to my land and get the old faithful 1965 MF 135 diesel with a 7ft. blade on the loader to do my job. It took at least twice as long as the skid steer but I got the job done. Dave
 
What kind of skidsteer? Bobcat? Could be a head gasket. The hose were not warm because it could be real low on coolant
 
It's a 94 Thomas T133 with less than 4000 hours. I don't think the coolant was too low. The hoses always got hot before but the day when I need it, it develops a leak. I haven't had to use the block heater for a long time and did last night just to make sure it would start. It wasn't very cold. I wouldn't think that the block heater would cause any problems. Murphy's law I guess. Dave
 
Can you see the block heater? I have heard of block heater popping out when used? If there was steam then maybe it was running on to a manifold.
Any more info would help to> I hope you get it figured out.
 
The block heater looked OK. I looked in engine parts book and there is another freeze plug beside the block heater. When it was running I tried to feel where the coolant was coming from and is was hot coming out of the engine. It would almost be nice if it was a freeze plug or something simple. If it was overheating the engine light(low oil pressure/overheating) should come on. The light works because when you turn the glow plugs on or shut the engine off, the light come on. Dave
 
Most likely a head gasket or freeze plug unless there is a fitting or something that could be leaking.If it has a thermostat it could be stuck but I dont think a stuck thermostat would make it leak at the back of the engine.
 
That engine has a hidden (actually 2) freeze plugs 1 behind what would be a bellhousing and also 1 inside the front cover, they are both prone to rust thru, of course the rear one only causes an external leak but the front one lets coolant get into the engine.

I have saw a few blown head gaskets on Kubotas but it's not often, they use so many head bolts the sheer weight of the bolts are enough to hold the head down to prevent leaks, of course I'm kidding but I think there are 18 head bolts.
 
If the engine never got warm then it was low on water the leak in the back is most likely the problem you will have to fix that before continuing using the skidsteer.
Walt
 
Yes it has a lot of head bolts. I was thinking about it more and I think it's block heater related. It's only a 500 watt block heater and I haven't needed to use it for at least 5 or 6 years. I plugged it in and went to check on it because I noticed the breaker tripped, after an hour or so, that it was plugged into. There was snow on the top of the engine that was gone but the block didn't seem warm. The first time I tried to rest the breaker it tripped again. I thought it was the cord I used because the male plug is corroded a bit. I unplugged it and put it back in. Then I reset the breaker and it stayed on. When it started the engine did get warm, I felt hot coolant leaking when it was running. It didn't start steaming until I revved it up. I'm wondering if the block heater burned/shorted out and somehow the block heater seal is leaking enough to steam which would also reduce the pressure in the system so no heat went to the heater. Does this make sense? The Block heater is on the back and appears to be in the head rather than the block. I'm hoping I just need a new block heater. Dave
 
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