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Old 03-23-2005, 12:42 PM   #1
jkjersey
Scooby Newbie
 
Member#: 8399
Join Date: Jul 2001
Chapter/Region: Tri-State
Location: Mount Laurel, NJ
Vehicle:
GC8 JDM STI V swap
cardinal red

Question cylinders layout and compression results

I just did a compression test on my 1.8 ( EJ18 )

I do not know what cylinder is what .... (can someone please reply back with the corresponding cylinders)

I let the engine warm up and then pulled the fuel injector power plugs off each cylinder. It took awhile to take the plugs out (esp that one in the rear by the battery)so I noticed my first check was lower by a little bit between the 1st and 2nd reading on the cylinders

My 2nd readings were

**At the front of the car looking towards the engine is my coordinates when I say left and right

Back right = 164
Front right = 170
Back left = 172
Front right = 175

How are these compression numbers for engine that is almost 146K?
The engine feels ok when I drive it.
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Old 03-23-2005, 12:49 PM   #2
Aphex28
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Member#: 11506
Join Date: Oct 2001
Chapter/Region: NESIC
Location: Manchester, NH
Vehicle:
2015 WRX
World Rally Blue+TE37-TA

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I'm no expert nor do I know anything about the EJ18, but I think that as long as they're within 10 of each other you're golden.

EDIT: Oh! And to tell which cylinder is which, it should say on your coil by where the wire plugs into it. Cylinder 4 is the one closest to the passenger I believe. But this is for the EJ25 and yours may be different if it has the same type of ignition system

Last edited by Aphex28; 03-23-2005 at 12:59 PM.
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