what should compression rates be between

200,000 MILES
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STONER66
  • MEMBER
  • 1 POST
currently have 180, 167, 175, 175
Jun 30, 2012 at 10:05 PM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,403 POSTS
They're fine. Compression can't go up on its own unless the engine is very heavily carboned. You mainly want the readings to be within about 10 percent of each other which yours are.
Jun 30, 2012 at 10:39 PM
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