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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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550 Freeze Plug Question(s)

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Preston Bell

02-09-2006 14:52:52




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I have a 1966 (or so) Oliver backhoe/loader with a 4-cylinder Waukesha based diesel engine. Last winter I forgot to drain the radiator when I put it in winter storage and when I went to fill it up with fluids in the spring it took a lot of water. The crankcase than started overflowing. I realized than what had happened and walked away in disgust (at myself)!. Something has frozen and broke. I am hoping it is not the engine block, but cannot find where it is coming from. From the parts manual I see a possibility that there are some freeze plugs (or expansion plugs) several places in the engine. 5 in the cylinder head, one on the back of the block in the clutch area and probably more.
The 550 has the loader and backhoe on and it is very difficult to get to the engine for disassembly. I am trying to find out if there is an easier way to determine where the water is coming from inside the engine. Also perhaps someone is familiar with all the locations of possible freeze plugs within the engine that could lead from the cooling system to the crankcase. Thanking anyone with info in advance. Preston of the Mojave

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J. Schwiebert

02-10-2006 10:23:05




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 Re: 550 Freeze Plug Question(s) in reply to Preston Bell, 02-09-2006 14:52:52  
The freeze plugs you are talking about are all located in the head. Some are under the valve cover. There are no freeze plugs in the block for coolant. The one in the back of the block is the freeze plug over the last cam bearing. Questions?



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Kansas Cockshutt

02-10-2006 05:10:37




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 Re: 550 Freeze Plug Question(s) in reply to Preston Bell, 02-09-2006 14:52:52  
You could always beg, borrow, or buy a cooling system tester and have someone pump the tool while you place your ear around the tractor engine, where you can reach your ear that is, and listen for any escaping air/ look for water dripping. Listen from the sparkplug holes and engine breather tube too. If it is quiet enough you might get lucky. Good luck.



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Don-Wi

02-10-2006 04:43:50




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 Re: 550 Freeze Plug Question(s) in reply to Preston Bell, 02-09-2006 14:52:52  
There is only 1 way to see how bad it is, you gotta take the engine out and tear it down. I've never heard of an engine with freeze plugs inside the block, so it sounds like you've probably got a boat anchor.

What I'm wondering is, why don't you use anti-freeze/coolant, instead of plain water? Then you wouldn't have to worry about anything freezing, and it'd be ready to go.

Donovan from Wisconsin

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