Welcome to the North American Subaru Impreza Owners Club Sunday April 26, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 07-11-2005, 10:38 AM   #1
rjp98outlook
Scooby Newbie
 
Member#: 59918
Join Date: Apr 2004
Default 02 OUTBACK engine hollow knocking sound when warm. replaced pistons+tensioner already

Hi.
I have read a few discussions on Subaru engine noise in this forum and I am hoping someone can help. I also have a noise problem in my 02 outback that I can't live with. I have only 26K miles on it and have been to the dealer 3 times already. The noise is a hollow knocking sound that is quite subtle (but is slowly turning my brain into jelly) and only occurs when the car is ***fully warmed up*** and under light load (like around 2500 to 3000 rpm with foot just barely on accelerator -- almost coasting) Sounds like something is loose and floating/knocking. Subaru already replace the timing belt tensioner and bracket, and just last week they replace two of the pistons (#2 and #4) with special pistons designed to not slap. This had no effect at all on the noise. As I suspected, it was not piston slap in the first place. What a waste of Subaru's money to replace these unnecessarily under warranty. What can I do now? Is this engine supposed to sound this way? I have a manual trans which dealer says may exagerate the noises.

Thanks
Rich
* Registered users of the site do not see these ads.
rjp98outlook is offline   Reply With Quote
Old 07-11-2005, 01:08 PM   #2
Legacy777
Scooby Guru
 
Member#: 4800
Join Date: Mar 2001
Chapter/Region: TXIC
Location: Houston, Tx
Vehicle:
1990 Legacy & 97 OBS
AWD 6MT EJ22T AWIC Swap

Default

Have you driven another subaru to see if it's your specific car or just a subaru thing?

Are you absolutely sure it's an engine noise, and not something else on the chassis vibrating/rattling?
Legacy777 is offline   Reply With Quote
Old 07-11-2005, 01:26 PM   #3
Al_Smokemcrack
Scooby Specialist
 
Member#: 66640
Join Date: Jul 2004
Chapter/Region: Tri-State
Location: Rochester, NY
Vehicle:
1997 Legacy Outback
Glacier White

Default

I have a fuel injector that gets really loud when the engine's warm. I thought it was a valve for the longest time. Maybe you have something similar? Get a long screwdriver out and stick it to different parts of the engine with your ear against the handle. The old skool Mechanic's Stethescope. It should allow you to at least get an idea as to where the noise is coming from. Though I'm surprised the Subaru techs didn't find it, there are instances when they can be titanically stupid. This goes for any professional techs, actually, especially dealer techs, who seem to be the bottom feeders.

Nothing against the good dealer techs out there, and there are lots, but I'm just saying that my experience dictates that dealer techs miss more and cut more corners on average than others.

Last edited by Al_Smokemcrack; 07-11-2005 at 01:28 PM. Reason: Clarification.
Al_Smokemcrack is offline   Reply With Quote
Old 07-11-2005, 02:10 PM   #4
rjp98outlook
Scooby Newbie
 
Member#: 59918
Join Date: Apr 2004
Default

If I disconnect the injectors one at a time would this be a way to see if it is cylinder specific?
rjp98outlook 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Knocking sound when hitting bumps Spaz0351 Brakes, Steering & Suspension 8 02-01-2010 02:58 AM
04 FXT knocking sound when engage clutch Caddy Daddy Forester Forum 1 03-05-2008 11:52 AM
Knocking sound when motor gets hot Stainlessmag Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 11 11-01-2005 11:57 AM
Knocking sound after flywheel replaced? subynube Transmission (AT/MT) & Driveline 12 09-20-2005 10:57 AM
Heavy knocking sound when motors cold nitrohuffer Legacy Forum 12 11-12-2003 10:37 AM


All times are GMT -4. The time now is 01:18 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.