I would pull the radiator off then remove the lower collant housing. Now with hose and a nozzle spray water into the block to try and backflush that part of the block. There are four hles letting coolant down past the wet sleeves and one or more of those ports are probably blocked and not lettint the collant flow thru and into the radiator. You can use a maglite to see in there and use a stiff piece of wire you can get those holes open and flush out all the loose junk. I have overhaulled several of those engines in the last 10yrs since retiring and playing with my hobby tractors. Also have parted out several blocks and when the sleeves are pulled amazing how deep the crud will be in the bottom and plugging the holes. Using good pressure and compressed air you will be able to get the flow going thru the block like its supposed to go and that will be the end of your colling problems. You can also add a water pump at this time ifn ya want to the pump will make sure it runs cool.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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