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Old 10-16-2015, 10:28 AM   #1
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darned plastic radiator side tanks


This from my 1994 Camaro Z28 with 113k miles... my previous 1987 Z28 had the same failure at 115k miles (although it was only 7 years old at the time). Coincidence? New rad isn't that expensive but they really shouldn't be designed to fail, one would think.


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Old 10-16-2015, 10:56 AM   #2
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Coolant condition has a lot to do with cooling systems that fail. I flush mine every fall before it gets cold and make sure it can with stand the freezing temps. If coolant is not tended to, it turns into acid. You can measure the voltage by getting a multi-meter and putting one on the metal part of radiator and the other tip into the coolant in the neck of the radiator not touching the neck. I have seen 3 volts and the condition was like runny mud. It was eating the metal it touched. (Freeze plugs, water pump, gaskets, ect) The plastic tanks on radiators eventually just get old and crack or the seams leak.

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Old 10-16-2015, 11:06 AM   #3
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Coolant is in good condition. Besides, acidic coolant should not affect the plastic parts. That's what always seems to fail
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Old 10-16-2015, 11:31 AM   #4
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Heat kills them.

They make small aluminum overflows that can be adapted.
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Old 10-17-2015, 09:28 AM   #5
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My radiators usually fail at the seam between the plastic and aluminum.
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Old 10-21-2015, 11:56 AM   #6
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any parts that pass 15-20 years on a car is very good, a lot of modern cars are junk after 10 years

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