Shibaura SD2243D overheating

[WestPalmBob]

Hey Folks --

Shibaura SD2243D overheating... well - at least that was the original problem. The radiator was full of coolant and the fan is operating but the tractor was overheating. I was suspicious that the thermostat might be stuck or perhaps plugged up with crud. I removed what looked like the top of the thermostat housing connected to the upper hose. There was no thermostat there. I thought it might be between the lower housing and the block. In trying to remove that, I managed to shear off two of the four bolts, using very little force. Even with the two good bolts removed, and the heads broken off the other two, I've been so far unable to get the housing off the block. My next plan is to sharpen a paint scraper and try to drive it between the block and the housing. Other suggestions appreciated.

The broken bolts are the first problem. I think I'll be able to handle them once I get the housing off. I'm concerned after looking at drawings for similar engines, I'm thinking that the thermostat should have been where I was looking, but that it was removed by the previous owner. Any thoughts as to what else might be causing this overheating? Perhaps a plugged up radiator?

Thanks again for any suggestions. This site / forum has been tremendously helpful when I've previously had problems. I'm still just a bit jealous of folks who have tractors with good documentation and available parts...

-- Bob

 

[Harry in Ky]

Ihttps://www.mycnhstore.com/us/en/newhollandag/na/tractors/compact/naba17com0543cyl/3-cyl-compact-tractor/engine/cylinder-head-1710/cn/FE7ABCCF-B8BF-E111-9FCE-005056875BD6/71EE724F-E6BE-E111-9FCE-005056875BD6

I'm curious as whether your engine might be pretty close to this. Sounds like you stepped in it with the broken bolts. Not sure how much room you have to work with, but short of pulling the head I doubt you will have much luck simply working the housing off of the rusted bolts. If you haven't yet started jamming things in between the housing and the head (yet) and damaged anything there, I would be tempted to leave it alone. The bolts probably never moved, just broke. The bond between the bolt shanks and the holes in the housing are still just as tight as before, so if you haven't ruined the integrity of the gasket behind it by messing with it, the housing gasket may not leak. I would put the lower bolts back in, fill it with plain water, and see what happens. If it leaks, you know where you are. If it doesn't, then continue on dealing with the over heat issue for now.

 

[WestPalmBob]

Ihttps://www.mycnhstore.com/us/en/newhollandag/na/tractors/compact/naba17com0543cyl/3-cyl-compact-tractor/engine/cylinder-head-1710/cn/FE7ABCCF-B8BF-E111-9FCE-005056875BD6/71EE724F-E6BE-E111-9FCE-005056875BD6

I'm curious as whether your engine might be pretty close to this. Sounds like you stepped in it with the broken bolts. Not sure how much room you have to work with, but short of pulling the head I doubt you will have much luck simply working the housing off of the rusted bolts. If you haven't yet started jamming things in between the housing and the head (yet) and damaged anything there, I would be tempted to leave it alone. The bolts probably never moved, just broke. The bond between the bolt shanks and the holes in the housing are still just as tight as before, so if you haven't ruined the integrity of the gasket behind it by messing with it, the housing gasket may not leak. I would put the lower bolts back in, fill it with plain water, and see what happens. If it leaks, you know where you are. If it doesn't, then continue on dealing with the over heat issue for now.

Hi Harry - Thanks for the quick reply. I believe that is the same engine. For my model I'm pretty sure it is a Shibaura H843 which I believe is the engine was used on Ford 1710. From the drawing it looks like the thermostat should have been where I first looked. The top two bolts (the ones that are broken) seem to go through the thermostat housing and thread into the block. The lower two which I successfully removed pass through a flange about 1/4 inch thick and then into the head. The bolt length is about 1 1/4 inch. I thought it would be a fairly simple matter to get the thermostat housing off, once the head of the bolt was gone, but now you've got me thinking that the body of the bolt could be corroded to the housing. It would be a pretty easy test to put the bottom bolts back in. I haven't done any damage to the housing or gasket because I haven't been about to get the housing to move at all. Looking at the bolt heads, there is about 1/8 inch of threads before the break. Looking at the front of the housing, the bolts appear to be broken flush with the face of the housing.

As for access - If I have to remove these with bolt extractors, I need to remove the hood, radiator, fan, shroud, water pump, etc to have ample room for access from the front. The arms for the front loader make access from the side difficult. My hope was that with penetrant I could manage to extract these, but I agree - if it works without leaking, perhaps I should go down that path. As bad as this is, a broken off screw extractor would be much worse. Who ever came up with the name "EasyOut" was a liar but also a marketing genius.

All this said, I'll still have the overheating problem.

Thanks again for your good advice.

 

[Harry in Ky]

You can't remove those bolts with extractors. That simply won't work. Your only hope would be working the housing off the bolts first, and chances are you ruin the housing in the process. I fear if the gasket leaks you'll be pulling the head.

 

[WestPalmBob]

You can't remove those bolts with extractors. That simply won't work. Your only hope would be working the housing off the bolts first, and chances are you ruin the housing in the process. I fear if the gasket leaks you'll be pulling the head.

I think you are right. I'll put the other two fasteners back. With a bit of luck, it won't leak.
Thanks again for the guidance.

 

[WestPalmBob]

Greetings all -
I want to share the status of this issue. First off - thanks to Harry for his suggestions that very much helped me understand the problem. Before somehow I thought the bolt was seized in the head, when if was actually corroded to the thermostat housing. A machinist buddy of mine came by today and looked at the issue. He said the only right solution was to remove the old housing, repair or replace as needed. To remove the part he took two long wedges 1/2 inch wide, 5 inches long and drove them between the head and housing. Once that was done, the broken off bolts had an inch of material to grab. They were only finger tight. The whole process took less than 10 minutes.

BTW - the Ford 1710 thermostat housing for sale on Ebay, which is supposed to be from the same engine, won't fit here, so I'm glad this part didn't get damaged. It has some pretty bad corrosion. My buddy will either fill in some of the corroded areas or machine a replacement. Either way, I'm out of the woods. Again - Thanks so much. I truly appreciate the help I've received from this forum.