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Old 06-08-2013, 07:31 PM   #1
Zane
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Member#: 292786
Join Date: Aug 2011
Chapter/Region: MAIC
Location: VA
Vehicle:
2003 WRX
Sonic Yellow

Unhappy Need Confirmation/help.

Alright, my car is finally running again but it's making a loud tapping/knocking. I didn't see any visible metal in tear down or after, don't THINK it's a rod knock.

Firing on all 4 fine, seems like it's idling fine, no audible missing or shuddering in the car.
114-115 compression in ALL 4 cylinders.
Misfire codes on ALL 4 cylinders though.
Took stethoscope all around engine, the sound is the same no matter where I check.

1st seems to contradict the rest which is what has me baffled @_@

I'm thinking bent valves when my father did the timing. Thoughts?

Have working at 5am so won't be replying til tomorrow afternoon most likely. Thanks in advance for any assistance.
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Old 06-08-2013, 08:43 PM   #2
WrxWrb
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Start with the simple.
Back sure your coil pack wires are white closest to radiator and black closest to firewall. If backwards it'll run like garbage.
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Old 06-09-2013, 03:39 AM   #3
Zane
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Sonic Yellow

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Quote:
Originally Posted by WrxWrb View Post
Start with the simple.
Back sure your coil pack wires are white closest to radiator and black closest to firewall. If backwards it'll run like garbage.
It's not running like garbage and they are in the right order. The noise and compression are my worry.
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Old 06-09-2013, 11:17 AM   #4
HinshawWRX
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Location: Common Sense, VA
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GT3 (Currently on Fire)

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Your compression is WAY too low.
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Old 06-09-2013, 02:19 PM   #5
Zane
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Quote:
Originally Posted by HinshawWRX View Post
Your compression is WAY too low.
I know >_> It was 154-157 before. That's why I'm posting here, I want some insight before I tear it down again.
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Old 06-10-2013, 06:29 AM   #6
Zane
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Guess I'll just tear it down again and see what I find... Surprised I didn't even get an Uncle Scotty "You're an idiot and spun a bearing" reply.
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Old 06-12-2013, 06:25 AM   #7
Uncle Scotty
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we have an Uncle

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sounds like valves
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Old 06-19-2013, 09:41 PM   #8
Zane
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Did leak down test, air was going in Cylinder 4, coming out Cylinder 2. Pull heads, cracked from intake valves to spark plug holes... valves look fine. Still have no idea what the noise is/was, but cracked heads explain bad compression. No idea how they got completely cracked, never overheated the car or anything.

So far I've had to replace the ECU, head(s), and every idler and the tensioner. Did new Oil Pump and Water Pump while I was at it... now just to see what I need to replace for that damned noise @_@ Waiting on heads to get here.
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