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Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

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Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

  #1  
Old 11-16-2006, 09:35 AM
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Default Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

ive got an abnormal hesitation from about 2200-2800rpm or so (not the normal 'honda motor lack of torque crap). comp. tested it yesterday, the first 3 cylinders are normal (about 175psi) but #4 barely even got up to 125psi, and that was with cranking for a while. now, i know your only supposed to have about 28psi difference b/t cylinders, so what could the problem be? rings, poor valve seating, weak springs, etc?? and what are my options. the car runs fine otherwise.
 
  #2  
Old 11-16-2006, 11:48 AM
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Default RE: Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

YOu should really only have 10psi or less difference between cylinders, but that's besides the point right now...

If I had to guess, I'd say rings. Have you had a leakdown test run?
 
  #3  
Old 11-16-2006, 01:17 PM
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Default RE: Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

Yes, I would also say either rings or valve seating/fried valve. Not the weak springs, though. You'll probably see exactly what happened when you remove the head. And about options - I really do not see any viable option other than fixing this ASAP, and you'll have to at least remove the head, and possibly go for full engine rebuilt
 
  #4  
Old 11-16-2006, 01:22 PM
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Default RE: Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

The money you will spend can get you a better motor just to let you know.
 
  #5  
Old 11-16-2006, 09:46 PM
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Default RE: Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

does the car burn an oil?
 
  #6  
Old 11-20-2006, 02:46 PM
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Default RE: Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

nope, doesnt burn or leak any oil. a lil oil is getting to the plugs now tho, so im gonna replace the valve cover gasket and the plug o-rings n such. i know if i fixed it it would cost as much as a better motor, but the fact is i dont have enuf knowledge at the present time to do a motor swap, and even if i had help from my buddies this car is my daily driver so id have to figure out something.

could it be a leaky head gasket around that cylinder??
 
  #7  
Old 11-20-2006, 03:08 PM
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Default RE: Cylinder #4 barely hits 125psi compression...WHAT ARE MY OPTIONS?!

If could be but then youd be burning coolant and the car would be overheating.
 
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