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bad compression...

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Old Feb 9, 2009 | 12:58 PM
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mowchowbrowncow
 
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Default bad compression...

okay so did a compression check on my dual cam ka and all cylinders came back 130psi all the way across....i dont kno wat there suposed to be but i kno its not 130...soo would it be cheaper to find a short block or just rebuild the bottom end?
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Old Feb 9, 2009 | 01:01 PM
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ka's are cheap as fuck, but theres always a risk of something being wrong with one that you wouldnt have if you just rebuilt it.

but find out what the problem is first before you do anything
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Old Feb 9, 2009 | 01:05 PM
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word ya i mean i dont get it...it runs strong pulls hard,n i have never seem it smoke...
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Old Feb 9, 2009 | 01:13 PM
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did you hold the throttle body wide open?
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Old Feb 9, 2009 | 01:15 PM
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Originally Posted by Sohc4now
did you hold the throttle body wide open?
lol i though that at first, bc i did that the first time i did a comp test too.
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Old Feb 9, 2009 | 02:44 PM
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why would i hold the tb wide open? lol no i just unplugged all my plugs then one by one took out n tested my cylinders
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Old Feb 9, 2009 | 02:52 PM
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so you can get more air then whats just in the manifold. do it again but give it full throttle.
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Old Feb 9, 2009 | 03:06 PM
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ight lol i never knew you were soposed to put it under WOT
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Old Feb 9, 2009 | 03:56 PM
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a good ka with my compression tester comes out to be 215 i wouldnt get anything less than 185.
if i was in ur shoes i would just rebuild the bottom end if you have someone do it. it should not be that expensive.
new head gasket,bearings,rings,check the valves
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Old Feb 9, 2009 | 04:03 PM
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dam i read that like 180 is what there suposed to be,
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