Engine radiator MISHIMOTO or Koyo

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Reviews found: 0
Koyo Engine radiator
SchrodingersLunchbox
Rating 0.5
  • Overheating:
  • Leaks:

Roughly 12 months ago, I upgraded the radiator on my 2000 Series 8 (~65,000km/40,000mi) to a Koyo R1443N 48mm N-Flow. The coolant seals blew because the radiator's design allowed air to accumulate, creating hot-spots and leading to seal failure. My water temps never exceeded 90C. After a rebuild, a valve was installed on the radiator elbow, making it quicker to bleed the system, and water temps are now around 77C, about 10C cooler than before. The Koyo radiator's design prevented proper bleeding of the coolant system, causing seal failure.

Cons: design flaw, air accumulation, seal failure
Vehicle: Mazda
Mileage: 65000 km
Part number: R1443N
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