Original Radiator's Life Span

These are shots of what look to be hairline cracks. They are actually spots where the liquid plastic flowing into the mold came together. Was the injection mold or the plastic itself not hot enough, was the tank removed from the mold before totally solidified, are they cracks subsequently filled in after the fact? Some of them show evidence of being ground down. Hard to tell.
I noticed the "lines" on day one but the dealer refused to do anything about it unless it leaked.
The radiator is still like new inside and out 17 years and 250K later.

It seems the OE Harrison radiators had some quality control issues. This, along with some other parts made by GM subsidiaries as OE for the 1st gens, like the washer fluid tanks.These are shots of what look to be hairline cracks. They are actually spots where the liquid plastic flowing into the mold came together. Was the injection mold or the plastic itself not hot enough, was the tank removed from the mold before totally solidified, are they cracks subsequently filled in after the fact? Some of them show evidence of being ground down. Hard to tell.I noticed the "lines" on day one but the dealer refused to do anything about it unless it leaked.The radiator is still like new inside and out 17 years and 250K later.