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tubman · 12-07-2025, 01:48 PM

I think it depends on how long the heater core has been in there. If it's an original or of unknown age, I'd remove it and repair or replace it. If it's a fresh restoration, I might chance the stop leak (only because the car has a rubber floor mat)..

12-07-2025, 01:48 PM	#2
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 12,146	Re: Heater core leak I think it depends on how long the heater core has been in there. If it's an original or of unknown age, I'd remove it and repair or replace it. If it's a fresh restoration, I might chance the stop leak (only because the car has a rubber floor mat)..