Posted by WA-Hal on October 24, 2009 at 20:00:40 from (208.81.157.90):
In Reply to: RADIATOR ?? posted by BOWTIEIH on October 24, 2009 at 16:26:44:
Quite a bit. I once bought a fairly low mileage used car that looked really good. A couple of months later, I decided to drive that car on a vacation. It was Summer and the car got hot, especially when I was at high elevation.
I got to my destination, after running the heater quite often to add some needed cooling. I thought the radiator must be partly plugged, so I removed it and took it to a radiator shop to be "cleaned and rodded out". When I went back the next day, the owner of the radiator shop showed me my radiator. They had put it in the cleaning solution and when they took it out, many of the fins had more or less dissolved. The fins that were still there were very fragile and would dent at the slightest touch.
The guy at the radiator shop said he had seen other radiators do the same thing, although he had never seen one eaten up as bad as mine. He suggested that the used car might have been driven on ocean beaches a lot or parked so the front got a lot of salt spray. The salt attacked the thin brass in the fins making them much thinner and fragile. The damaged fins were unable to transfer the heat from the relatively undamaged tubes, and that was why the car was overheating. He suggested getting another radiator from a wrecking yard, since he could not rebuild the one I had for twice what I would need to pay for a good used one.
With the used replacement radiator installed, I was on my way. I drove the car for a long time with that replacement radiator, and it worked fine. I also had to replace the original heater core eventually. Strangely, the rest of the car never did get rust or corrosion problems, which I expected considering the damage the radiator had.
If the fins are bad, the radiator will not work efficiently. You might get by in cooler weather, but when you really need cooling capacity in hot weather with low airflow, like in a traffic jam, the thing will overheat. I would just replace it. Good luck!
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