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99rs-t
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79 Posts
Discussion Starter · #1 ·
this is a oem 65k 05 257 with 99 sohc heads..with sti HG.

wot cold motor,

#1- 165

#2- 170

#3- 145

#4- 170

i did this because my now to relize my pcv system is run like shit and breather ports on my valve covers aro open and a litttlt blowby out of the dr side cover....
 

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opendeck251+stiInternals
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483 Posts
IIRC, the most deviation between min and max compression numbers is 10% before you need to think about a rebuild. I could be wrong. Are the heads in good condition? If they aren't sealing all the way from carbon build-up or what-have-you, it could give lower numbers.


~Josh~
 
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