tried posting this in the integra forum, but didn't get a damn thing...

BACKGROUND INFO: ok, i did a compression test on my boosted integra the other night and all the numbers were 155-165 except the number 2 cylinder which was ~130. i noticed that my boost gauge use to read about -20/22 vac at idle, and about -22 in my old integra but now it only reads 15-18 (happend a little after i started boosting). Also, my valves sounds WAY out of wack.
my question is, can "unadjusted valves" that are way out of spec cause the slightly lower compression as well as the decrease in idle pressure? Im almost 100% certain my rings are not blown as i have 0 smoke of any color out of my exhaust and im not burning oil or anything.

-ryan

 

try doing a valve job

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jordo &raquo;</TD></TR><TR><TD CLASS="quote">try doing a valve job</TD></TR></TABLE>

omg.... my question is not "how can i fix the compression" but "will a valve job fix it before i go through the trouble of doing it right this instant"

-ryan

 

yes... if you do a valve adjustment it might solve your problem... it only would take one valve left a little bit open to allow air to escape and give you a faulty compression test

do a valve adjustment then check it again
you could also consider doing a leakdown test

 

before you try doing a valve job...try pouring a little oil into the two cylinders with low compression and doing a compression check again. if it's the valves, your psi will stay the same, if it's the rings then your compression will go up.


-sherman

 

yea the oil will be the first easiest to do. valve adjustment second

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shermanyang &raquo;</TD></TR><TR><TD CLASS="quote">before you try doing a valve job...try pouring a little oil into the two cylinders with low compression and doing a compression check again. if it's the valves, your psi will stay the same, if it's the rings then your compression will go up.


-sherman</TD></TR></TABLE>

i thought if u had cracked ringlands your compression #'s wont go up either

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pengo &raquo;</TD></TR><TR><TD CLASS="quote">yea the oil will be the first easiest to do. valve adjustment second</TD></TR></TABLE>

i'll be trying this... how much oil should i use? just a quick splash or what?

-ryan

 

1 capfull