the phrase 'rotten' is not mine, it is the expression used in the industry for old cores
yes, like any part under stress it has a finite 'life'
and it could have been bumped, or simply had a 'thin' soldered joint; who knows ?
also yes, over the past 40 yrs of owing cars I have indeed replaced several heater cores (4 I think, but I drive old stuff)
- had an Aerostar with a leaking core that was 6 yrs old
-> my daughter's '83 Fairmont has a leaking heater core, the ENTIRE goddamn dash has to be removed, bummer - #5 I guess now
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