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Strange coolant leak

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Old Jun 22, 2025 | 11:37 AM
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Strange coolant leak

1993 F250 with 7.5L. I've been fighting a coolant leak that appears to be at the upper radiator hose connection to radiator. Got new hose and clamp. I keep snugging it, trying not to overdo it. The weird thing is that I'm seeing coolant pretty far from the cooling system, like over on the battery tray and on the charcoal cannister (??) attached to the side of the battery tray. Not super easy to see in the pic, but the side of the battery, the tray and the cannister are wet. Evidence on the top of the radiator neck as well. My best guess is pinhole or hairline crack on radiator neck spraying over there. I don't want to replace it if someone here knows better though. Any other ideas?


 
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Old Jun 22, 2025 | 11:50 AM
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Perhaps a pinhole that leaks under pressure, or is it leaking onto the fan and flinging it over there?
 
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Old Jun 22, 2025 | 11:58 AM
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Originally Posted by Junktownbill99
Perhaps a pinhole that leaks under pressure, or is it leaking onto the fan and flinging it over there?
Yeah I though about the fan. Maybe, but it's a bit forward of that. Still probably a radiator issue in that case.
 
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Old Jun 23, 2025 | 06:38 AM
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Use a cooling system pressure tester, and, in the "right light" you might spot the cause and location of the pinhole leak
 
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Old Jun 23, 2025 | 08:29 AM
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I decided to just throw a radiator at it. They aren't all that expensive and the job doesn't look so bad. Could use a flush anyway.
 
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