HOW DO YOU READ A COMPRESSION TEST

  • Tiny
  • Anonymous
  • 2001 Plymouth Neon
  • 20,260 miles

How do you read a compression test. And what is a normal reading in this vehicle? I am trying to replace another engine. The engine I am interested in has a cylinder compression of 150/180, 170/180 something to that effect. Good, Bad?

Thanks, Johnnie

Wednesday, January 30th, 2013 AT 5:44 PM

1 Reply

  • Tiny
  • caradiodoc
  • Expert
  • 25,616 posts

Those readings are okay. 150 is about normal. Mostly you want all four cylinders to be about the same. Why are you replacing the engine?

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Wednesday, January 30th, 2013 AT 9:48 PM

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