Welcome to the North American Subaru Impreza Owners Club Friday July 11, 2014
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 03-01-2001, 03:02 PM   #1
Overtime
Scooby Specialist
 
Member#: 1346
Join Date: Apr 2000
Post Underdrive pulley problems

Yup, as of late, I've been having some issues with my UD pulley. It sounds like the pulley is vibrating-there's a definite chugging noise coming from there. Has anyone else had this problem?

It's a tremendous pain in the butt...sounds like the engine is really wheezing. Anyone able to diagnose the sound? Maybe the pulleys need to be tightened?

I'm seriously considering removing the pulley...I just need a bigger breaking bar...but if there's a way for me to sneak a box wrench in there and fix it, that would be ideal.
* Registered users of the site do not see these ads.
Overtime is offline   Reply With Quote
Old 03-01-2001, 04:23 PM   #2
Greborb
Scooby Newbie
 
Member#: 2974
Join Date: Nov 2000
Location: Portland, OR SPEC
Post

Had mine on for 10k mi and had no problems. Check belts. It probably needs adjustment.

There is a potential larger issue with no vibration damping that I believe donjuan posted very recently, something written by Dinan.
Greborb is offline   Reply With Quote
Old 03-01-2001, 05:16 PM   #3
Pimp-sube
Guest
 
Member#:
Post

OT, make sure that it is tight! A loose pulley can destroy your engine crank shaft if it wipes out the key!

Kevin

P.S. A dampener is NOT needed on a horizontally opposed four Subaru!
  Reply With Quote
Old 03-01-2001, 05:36 PM   #4
TSDScooby
Scooby Newbie
 
Member#: 2856
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Boston MA, USA
Vehicle:
2008 Outback XT
Blue

Post

I don't know much about engines, but this article http://www.i-club.com/ubb-files/Foru...ML/001676.html has very good points about the risks of using an UD pulley. There's also a VERY compeling argument to why it doesn't matter that the Subaru engine is a boxer.
From my point of view, the bottom line is that the power gain (i.e., fun factor) does not make up for the risks. However, if you do not run the engine to high RPMs then apparently the risk is lower.... then again if you are making modifications like these you are probably the type guy/gal that likes to run high RPMs :-)

Just passing the word around. I'm not technicaly savy to be making recomendations. THis is just my opinion based on what I've read so far.

my 0.00000000001 cents

Cheers,

TSDScooby
TSDScooby is offline   Reply With Quote
Old 03-01-2001, 07:56 PM   #5
Overtime
Scooby Specialist
 
Member#: 1346
Join Date: Apr 2000
Post

Damn, I just checked that article. Really makes me want to uninstall the sucker...and I don't understand everything Dinan said even.

I'm going to snake in a wrench and see what I can do to it to tighten the bolts, but I may have to bring it to someone more adequately equipped and less likely to make the problem worse...I just don't think I can afford that at this time...
Overtime 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
Underdrive Pulleys/Lightweight Pulleys UGotBoost? Factory 2.0L Turbo Powertrain 3 10-22-2003 10:32 AM
Vishnu Underdrive Pulley Problems 02silverWRX Service & Maintenance 6 05-14-2003 05:27 PM
ok, the theory on the underdrive pulley problem thing jmott Texas Impreza Club Forum -- TXIC 20 02-14-2002 03:09 PM
Underdrive pulleys AND lightened pulleys? jhayzhon Normally Aspirated Powertrain 1 10-10-2001 07:50 AM
Underdrive Pulley Problems!!! Xscreamer Normally Aspirated Powertrain 9 11-14-2000 06:43 AM


All times are GMT -4. The time now is 02:51 AM.


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