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Old 08-20-2012, 12:34 AM   #1
Ptero
Scooby Newbie
 
Member#: 124705
Join Date: Sep 2006
Location: Winnipeg, Canada
Vehicle:
2001 Outback Sport

Default Low compression on #4, buy new engine?

Engine: '01 EJ22

I swapped the engine in my Impreza Outback Sport only to find the new engine has bad compression on cylinder #4.

1-185
2-185
3-190
4-130

I adjusted the valve lash to .008 on intake and .010 for exhaust which didn't make any difference. I did a dry/wet test for cylinder #4 but there was only a 10-15 psi difference. I have not done a leak down test to find out exactly where I'm losing compression.

I can return the engine to the seller and get my money back or proceed with this one to find out where the problem is and how much effort it will take to fix. Do I even bother repairing or just find a new engine?
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Old 08-20-2012, 03:09 AM   #2
Tdaz250
Scooby Newbie
 
Member#: 310744
Join Date: Feb 2012
Chapter/Region: NWIC
Vehicle:
02 WRX
WRB

Default

If the guy sold you a bad engine go after him.
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Old 08-20-2012, 07:13 PM   #3
klaus_b2
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Member#: 318411
Join Date: Apr 2012
Chapter/Region: South East
Location: North Carolina
Default

this^
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Old 08-20-2012, 07:15 PM   #4
cal_look_zero
Scooby Specialist
 
Member#: 294461
Join Date: Sep 2011
Chapter/Region: NWIC
Location: Grass Pants, OR
Vehicle:
1997 Outback Sport
Acadia Green Metallic

Default

#4 is the notorious cylinder for burning valves.
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Old 08-20-2012, 08:19 PM   #5
subi400
Scooby Specialist
 
Member#: 216984
Join Date: Jul 2009
Chapter/Region: NWIC
Location: Hayden, ID
Vehicle:
1996 Impreza outback
Green

Default

My 96 impreza wagon has lower compression in cylinder 4 as well by about 35 points or so. Stupid cylinder 4....

But yeah, go after the person you bought the engine from.
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