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Old 02-09-2013, 12:08 PM   #1
foof247
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Member#: 290623
Join Date: Aug 2011
Chapter/Region: MWSOC
Location: Detroit Metro, Michigan
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2015 Wrx
Dark grey

Default 07 wrx compression concerns

I have an 07 wrx with 88k miles in it.

I did a compression test to find out that cylinders 1-3 have 150 psi
cylinder 4 is showing 140 psi.

Should I be concerned about this? I was told I will need to replace cylinder number 4 as soon as possible.
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Old 02-09-2013, 02:33 PM   #2
ProfessWRX
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06 WRX

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Quote:
Originally Posted by foof247 View Post
I have an 07 wrx with 88k miles in it.

I did a compression test to find out that cylinders 1-3 have 150 psi
cylinder 4 is showing 140 psi.

Should I be concerned about this? I was told I will need to replace cylinder number 4 as soon as possible.
I wouldn't mess with a rebuild. Youre talking about a less than 7% difference.
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Old 02-09-2013, 04:29 PM   #3
stevejones19
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The guys I took my car to just did one, highest was 130 low was 120. they said that it was completely healthy. You should be plenty good.
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Old 02-09-2013, 06:56 PM   #4
foof247
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alright I'm hoping so then I just don't want to have any unexpected and unwanted surprises out of my car
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Old 02-09-2013, 07:05 PM   #5
ProfessWRX
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Originally Posted by foof247 View Post
I just don't want to have any unexpected and unwanted surprises out of my car
"...a truth of the theory, well confirmed by practice, whatever can happen will happen..."

In other words, good luck with that!
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Old 02-09-2013, 11:56 PM   #6
GGSimpreza
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It's a Subaru motor and that's cylinder 4. Normal.
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