my car was recently diagnosed with one cylinder much lower than the others

2004 JEEP LIBERTY
88,000 MILES
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ABBIE841
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  • 2 POSTS
what could be the most likely causes, and if it is a blown head gasket,
how expensive could that be?

Thanks,
Abbie
Apr 5, 2012 at 8:24 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if one cylinder is lower than the other, it could be a valve burnt, head gasket, or broken ring or broken piston. it depends on how low it was. normally 20% is the deciding factor.
Apr 5, 2012 at 8:37 AM
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ABBIE841
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test shows cylinder 3 120 psi, all others have 180 psi
Apr 5, 2012 at 8:50 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
then it can be any of the things i've mentioned with the exception of the broken piston/broken ring. Also normally if one cylinder like #3 was low then with a head gasket #5 could be as well.
Apr 5, 2012 at 9:01 AM
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