Will stop leak temporarily help with a blown heater core
Pretty sure it is the heater core am going to replace it I just need to know if stop
leak will help for awhile
No reason why it shouldn't. You could also cap off the heater lines and adjust coolant level until you get a new heater core.
It might, but it may or may not cause problems elsewhere. The best fix is replacing the bad heater core. I would never use the stop leak products in my own vehicle, but many people have good luck with them.
Alumaseal has worked great for me when I have needed it.
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