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Old 01-13-2019, 09:13 AM   #20
Boog
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Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,888
Re: Heater core died.

My first old truck had a persistent radiator leak. I tried numerous times to solder it myself but I never could master the art of soldering. Anyway I thought a good cooling system flush might be good for the old truck. It was a '56 by the way. I didn't skimp on the flush. I bought a Dupont flush as it was the best on the shelf at the time. It's a 2 part deal. I followed directions and it cleaned it up real nice. Inside the rad tank it looked like new. Feeling good about it I refilled the system with new a/f and thought, job done. Thumbs up!
The next day the water pump went out. It was super clean inside but the flush had finished off the shaft seal in the pump. It just sped up the demise of the pump is all. One thing leads to another..
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Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
primer is finer
91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said.

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