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Discussion Starter #1
I have a 455 that is overheating due to a crack at the top of the radiator just behind the cap. The top part is plastic not metal. Can this be repaired with JB Weld or will I have to replace the radiator?

See attached image.

radiator.jpg
 

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If it was mine since it isn't any good this way I would clean the crack and sand a little around it. Then use JB Weld to put a gob over it and put a patch of same kind of material on top of it. You could cut some black plastic off a old car part if you need to. It will work and last many years if you also band aid with the plastic for more holding strength. People have fixed manifold leaks with the stuff in the past. I have used it on a fuel tank still holding. Besides JB Weld is way cheaper then a new JD Radiator.
 

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Buy a plastic welding kit. They start at around $60 and work just fine.
 

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Discussion Starter #5
I ended up buying a used radiator. It now runs very cool. The needle gauge barely moves even in hot weather with the blade engaged.
 

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I heard this can happen from too much frame flex, like mowing through ditches :dunno:
 
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