Compression issues

Tiny
DIANA HARR
  • MEMBER
  • 2005 JEEP LIBERTY
  • 3.7L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 131,000 MILES
My vehicle only has 40% compression in cylinder four. Was told the engine is bad and would need to be replaced. What are your thoughts on this?
Sunday, February 12th, 2017 AT 8:27 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Compression should be with in 20% of highest one. It can be a valve bad or blown head gasket. If you have a small camera to get in spark plug hole check for hole in piston if that is the case or piston all burnt up on edges then I would say new engine.
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Sunday, February 12th, 2017 AT 10:41 AM

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