S2000 Under The Hood S2000 Technical and Mechanical discussions.

Compression test results?

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Old Jun 11, 2015 | 05:34 AM
  #1  
ALBERTS2K's Avatar
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Joined: Jan 2011
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From: SF, CA
Default Compression test results?

I recently got a compression test done on my 2001 ap1, with 135k miles at a reputable shop around my area. They say the numbers are good but I'd like to get other opinions as well.

#1: 220
#2: 215
#3: 205
#4: 215


I know that consistency is key when it comes to a compression test, but #3 seems somewhat low compared to the others. Should I be concerned about this? or is this normal due to high mileage?
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Old Jun 11, 2015 | 06:12 AM
  #2  
rmerchant3's Avatar
 
Joined: Jun 2014
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Looks good. I like to see no more than a 10% variation between cylinders. Honda says no more than 28psi difference.

Cylinder three is a little weak compared to the rest, but not bad. I'd check the valve clearance just for fun.
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