Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-09-2018, 02:52 PM   #1
eyekyu
Scooby Newbie
 
Member#: 183670
Join Date: Jul 2008
Chapter/Region: SWIC
Location: Reno
Vehicle:
2002 Bugeye
PSM

Default Compression test results & Looking for advice

Well, did a compression test today on my bugeye. It was easy and a PITA at the same time haha. I feel my results are real low, but even wear.
I have NO CELs. Car runs fine, I may have an exhaust leak. and my upper radio hose leaks due to worn out clamp.

Cylinder 2: 105PSI
Cylinder 4: 110PSI
Cylinder 1: 110PSI
Cylinder 3: 105PSI

I took everything off that I could prior to warming the engine, working up against the Valve Cover sucked haha. Upon removal of the coil pack on Cylinder 2 there was a small amount of oil on the edge of the pack. Spark plug looked fine, so maybe not a huge issue.

As i mentioned, I feel my compression is LOW. Maybe an OEM rebuild? this is a fun weekend car/project. The motor has 134K. So, what would you guys do? Funds are limited, maybe new gaskets all around and have the motor cleaned?

Just looking for advice, thanks.
* Registered users of the site do not see these ads.
eyekyu is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-09-2018, 04:27 PM   #2
Valarius Starchaser
Scooby Newbie
 
Member#: 459312
Join Date: Dec 2016
Chapter/Region: MWSOC
Vehicle:
2004 WRX Wagon
Hybrid 6MT Swapped WRB

Default

Probably leaking valve guides or seats if it runs fine save your money and do a rebuild when you feel it’s really needed or if you don’t love the car that much just sell it now or drive until it blows up

Your looking at a couple grand for a proper OEM parts rebuild and then you still have a 130k mile body and worn out everything else perhaps
Valarius Starchaser is offline   Reply With Quote
Old 01-09-2018, 04:56 PM   #3
Vancouver98STi
Scooby Specialist
 
Member#: 459287
Join Date: Dec 2016
Chapter/Region: VIC
Location: Vancouver BC Canada
Vehicle:
1998 JDM Impreza STi
V4 GF8 White

Question

Quote:
Originally Posted by eyekyu View Post

...did a compression test today on my bugeye... I feel my results are real low...
Might have to do with the way the compression test was done.

Was the throttle held wide open during the test?

Was pressure still building when cranking was stopped?

Quote:
Originally Posted by eyekyu View Post

...my upper radio hose leaks
Better fix that before you lose too many stations.
Vancouver98STi is offline   Reply With Quote
Old 01-09-2018, 05:32 PM   #4
eyekyu
Scooby Newbie
 
Member#: 183670
Join Date: Jul 2008
Chapter/Region: SWIC
Location: Reno
Vehicle:
2002 Bugeye
PSM

Default

Quote:
Originally Posted by Vancouver98STi View Post
Might have to do with the way the compression test was done.

Was the throttle held wide open during the test?

Was pressure still building when cranking was stopped?


Better fix that before you lose too many stations.
yes Throttle was wide open, i did 2 passes. one with 6 cranks and one with 8 cranks.

llol damn spell check...
eyekyu is offline   Reply With Quote
Old 01-14-2018, 02:46 PM   #5
GDR
Scooby Specialist
 
Member#: 34924
Join Date: Apr 2003
Chapter/Region: SCIC
Location: Corona,Ca
Vehicle:
03 WRX Wagon
81 Scirocco S

Default

I think you have a GAUGE issue. It's either leaking or not accurate. Is this the first time using this gauge or checking this car?

Your numbers are too close too be a real engine issue. Rings can wear evenly over time but your mileage is still too low for those numbers. You should be going thru a lot of oil too.

Valve and ringland issues would only show in one or two cylinders and they would almost never be the same.


I would do another test with a different gauge before throwing money into it.

Video the gauge while testing. I due 10 cranks but see peak numbers at 6 to 7 cranks.
GDR is offline   Reply With Quote
Old 01-14-2018, 07:00 PM   #6
rtv900
Scooby Guru
 
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:
2016 STI

Default

Quote:
Originally Posted by eyekyu View Post
I have NO CELs. Car runs fine, .
^you answered your own question here

don't do anything unless you are just looking for an excuse to start a 3-5k project.
if so that's fine
rtv900 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 01:47 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.