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Review on DORMAN 603-500 Coolant Reservoir: Enhancing Engine Cooling Efficiency & Performance by Ray Gist

Revainrating 4 out of 5

So far so good for spares

So far so good. The part installed on my 1998 Mazda 626 with no problems. When I twisted the cap I actually heard a leak which the old one didn't have and I can't find antifreeze under the hood anymore. I will take the car for a 7 hour drive and better understand if it lasts.

Pros
  • Absolutely amazing!
Cons
  • Hard to say