Koyorad owners need help (1 Viewer)

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Had the Koyo in the '93; was working well for ~ 4 years while the truck was in Baton Rouge. Didn't work so well when the truck moved to Phoenix. The truck now has a TYC (IIRC, off Amazon) as part of a cooling system overhaul (different fan, water pump overdrive pulley); it already had a blue clutch with ~35k fluid in there. It looked like the core of the TYC was a bit thicker than the core in the Koyo.
 

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