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Old 04-10-2005, 01:03 AM   #1
jefersun
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Member#: 37716
Join Date: Jun 2003
Chapter/Region: TXIC
Location: Houston, TX (sugarland, TX)
Vehicle:
2002 ej257 Black WRX

Default Compression test yields disturbing results...(pics)

mods:

vf22
utec w/ tuna
Gt spec genII header and uppipe
TBE

So i thought i blew my motor, but now i'm having different thoughts. I kept getting this loud ticking sound that seemed to be coming from the middle of the motor, so i look under the car. It seems to be louder near the center, like where the oil pan is. I was thinking rod knock of some sort, or my crank, but i don't know.... I didn't think i could drive it, but i gave it a shot, and drove it for 30 min. I took off the belts that go on the alternator and a/c to see if it had anything to do with the idler pulley, but the car ran the same with both belts off. I floored it in 1st and 3rd, and got up to 18 psi and it was fine. The CEL was ticking occasionaly, giving me 01 counts of knock occording to the Utec. I scanned it after i cleared the codes and got p0304, 02, 03.... all misfires in those respective cylinders.

Now the car doesn't tick at all. I can drive it around town, as i am doing, and it is fine. The only thing is, is that after i floor it, i get a slowly ticking CEL, meaning misfires. I just came back from doing a compression test, here are the results:

145 ------------ 60
140 -------------- 145

I don't know which # each cylinder is, but thats the compressions in those respective cylinders. Obviously the cylinder with 60 psi is blown. While doing the test, i found oil on all of my plugs, with varying degrees, but plug that was in the 60 psi socket had an IMMENSE amount of oil. Here are some pictures:

Going from bottom left clockwise:

(140 psi cylinder)


(145 psi cylinder)


(60 psi cylinder)


(145 psi cylinder)


Some other interesting pics i found:

downpipe area

left heads (look from front of the car)

right heads

Behind intercooler




Any thoughts on what it most likely is?
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Last edited by jefersun; 04-10-2005 at 01:48 AM.
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Old 04-10-2005, 01:28 AM   #2
Blitz04
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blown ring? try wet compression test 60psi cyl
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Old 04-10-2005, 01:45 AM   #3
jefersun
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pics are up (sorry for the troubles), what you mean wet compression test? Why do you recommend that?
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Old 04-11-2005, 10:58 AM   #4
mistaboosta
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look at that plug, that knocks
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Old 04-11-2005, 11:17 AM   #5
KGreb
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Wet compression test means add about a teaspoon of oil to the cylinder and re-check. The oil helps rings seal. If the wet compression results go up, you typically have ring problems. If it doesn't, you typically have valve problems.
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Old 04-11-2005, 09:33 PM   #6
HIREN
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