Heater Core Blown

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projectmidnight74

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Mississippi
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Eddie
Truck Year
1974
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C10
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V8
So, I have a blown heater core on this thing that I must repair. While I am doing so, I have questions on if the radiator cap caused it. Im currently running and aluminum radiator with fans and a 19# cap. Is that cap too much and caused too much stress on the cooling system. Just wondering if I need to go down. this is a rebuilt sbc 350 with a mild cam, nothing crazy. But I just dont want this to be a repeat issue moving forward. Truck has less than 1k miles on it after a total system rebuild. All new everything.
 

PrairieDrifter

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Mason
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84,79,77,76,70,48
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Suburban k10, bonanza k10, k30, k20, c10, gmc 1/2ton
Engine Size
350, 350, 350, 350, 350, 350
Probably not. Old heater core?

I would still drop down to a 15-16 psi cap either way.
 

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