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Weird tag found on engine

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Old May 25, 2025 | 12:29 PM
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Weird tag found on engine

Pulled my 390 to rebuild, and during cleaning, found this tag epoxied to a freeze plug. Anyone know what this is about? Patent came up for a motorized wheelbarrow in the 90s
 
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Old May 25, 2025 | 12:55 PM
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Internet says that’s a patent for an overheat sensor for engine rebuilds. https://forum.ih8mud.com/threads/ove...nsors.1051901/

Google is your friend - mhttp://www.patentbuddy.com/Patent/5482000

It's a temperature sensitive disc. Probably attached by an engine rebuilder to make sure any returned engines haven't been overheated ?

Heat tab w/pics. https://gowesty.com/blogs/article-library/overheat-indicating-melt-tabs-the-whole-story?srsltid=AfmBOoqF_64c2dBKMrX10oRQtC7Wgov7yoGY WlRPqJzlKwIcpoX7_0Xu
 
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Old May 25, 2025 | 02:38 PM
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Right on. Thanks. Seems it has overheated at some point as the solder is gone from it. Just found one on the other side as well, but solder is still intact
 
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Old May 26, 2025 | 09:56 AM
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Bill's Machine Shop in Show Low, Az attached those tattletales to the backside of the cylinder head on all their builds. Takes the guess work out of some failures.
 
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Old May 26, 2025 | 04:22 PM
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Makes sense. I am just the other side of the mountain in eagar. Bought it 10 years ago out in St John's. Original owner noticed it at the grocery store years ago, and wanted to buy it. Wish i asked him a lot more questions about it.
 
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Old May 26, 2025 | 05:30 PM
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Found out it's a 360 also. Told by everyone it was a 390. Even got handed bad stroke measurements, and been buying 390 parts for 10 years. Opened it up, and there's an 2t crank
 
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Old May 26, 2025 | 06:41 PM
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Don’t feel bad. You’re not the first one that happened to.
 
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Old May 26, 2025 | 07:41 PM
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Not the last either. Door tag says 390, but the block says 1965 fe360, heavy duty truck. Can i buy a 390 rebuild kit for it still? Pistons have the same pin height? For some reason the 360 kit is $200 more than the 390 kit at northern

 
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