Posted by Janicholson on March 04, 2019 at 11:03:28 from (24.240.46.228):
In Reply to: 3010 freeze plugs posted by jdfamily on March 04, 2019 at 10:47:51:
This is not a flame, just truth. There are no freeze plugs in engines. The things called freeze plugs are welch plugs, or core plugs. They are used for the sole purpose of removing the sand based casting core material after the mold is filled when the engine block/head is made. The core material is fragmented and then removed by shaking and turning the casting in 3D space. Compressed air and washing are also used. They gained their name by being pushed out when engines with insufficient antifreeze actually freeze. They usually do not prevent casting damage. The grief with them is often that they rust out allowing leaks of coolant, or oil. Almost all sand casting that have internal passages (void spaces) have them. I am sure your JD does. Jim
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