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Review on ๐Ÿ”ง ACDelco GM Original Equipment 131-131 Engine Coolant Thermostat: Efficient Cooling Solution for Optimal Engine Performance by Omar Austin

Revainrating 5 out of 5

A good product. for engine cooling and air conditioning

I bought both thermostats and both were made in Japan not China. I tested their performance in hot liquid and also compared them to the originals. Both opened about 5 degrees higher than the originals, but that makes their response times much quicker. They do get a little warm after installation as my testing has shown, but they work very well!

Pros
  • Few competitors
Cons
  • No automatic