Brand new heater core leaking? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevydog66 · 10-28-2012, 08:45 PM

How could a brand new heater core be leaking? I purchased a new heater core for my truck since I was tearing it totally apart for paint, just got it all put back together and noticed antifreeze leaking inside on passengers floor just below heater box. I even rebuilt and painted the whole a/c - heater assembly with new gaskets as well. I doesnt leak all the time, but when I really step on the gas and accelerate it almost runs out. I checked the heater hoses on the firewall and they are tight, no leaks there. Anything else it could be?

10-28-2012, 08:45 PM	#1
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	Brand new heater core leaking? How could a brand new heater core be leaking? I purchased a new heater core for my truck since I was tearing it totally apart for paint, just got it all put back together and noticed antifreeze leaking inside on passengers floor just below heater box. I even rebuilt and painted the whole a/c - heater assembly with new gaskets as well. I doesnt leak all the time, but when I really step on the gas and accelerate it almost runs out. I checked the heater hoses on the firewall and they are tight, no leaks there. Anything else it could be? __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up

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