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Where to start?? 464 **UPDATE**

T

TimnSEVA

Member
Took some time today to tear into the 464. This is what I found. Water in the intake and exhaust ports on 3 cylinders and water in 3 cylinders.
Engine froze and popped a freeze plug. Had about 2 quarts of water in oil pan when I pulled the plug. Thinking cracked head?? Not sure. What would you do. Cost to repair?? Received
the tractor for free.
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What did you have in radiator Water or anti-freeze? If you had anti-freeze and water in pan it came from rain in exhaust pipe.
If plug froze out you will need to check for head and block crack.
 
I would probably put a freeze plug in it and fill water jacket with water and see if it leaks down and when it goes. Freeze plug is just a couple bucks and it would tell you a if block is broke or not
 
Looks like antifreeze from the color, and if it got in crankcase the crankshaft probably is pitted at rod journals, if it were mine I would look for salvage motor.
 
from what i can see is the exhaust was not covered. rain has leaked in cyl's from open valves. the frost plug popping is due to weak antifreeze or none at all. nothing a few thousand wont fix.
 
What are incorrectly called "freeze plugs" or "frost plugs" are actually just holes to get the core sand out of the internal passages of the block after it is cast.

Water expands in all directions when it freezes, and those little round holes aren't going to prevent damage. It is more likely that the block is cracked if those plugs are gone because that means the block froze solid.

If you want to resurrect this tractor you should probably start looking for a replacement engine. You can do some cheap things to see how bad the block is but in the end it should be cheaper to buy a running engine from a similar tractor to put in.
 
Looks like multiple problems to me.

The core plug being pushed out hints at lack of antifreeze in the cooling system. Probably a trashed block.

But the water in the ports also seems to point at the exhaust pipe being allowed to collect rainwater. Although, I don't know definitively whether the round port or square port is exhaust.

Best chance at anything imo is that the head is OK, but you'd need to spend time blocking off all the external water ports and doing leakdowns with compressed air to tell for sure. Probably need a couple pieces of cold rolled flat bar (steel or alum), a way to cut, shape, drill & tap, some RTV and the air compressor with regulator and gauge, and a ball valve. A bottle of soapy water or some Snoop would also be helpful.
 
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