Welcome to the North American Subaru Impreza Owners Club Saturday August 2, 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 > Factory 2.0L Turbo 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 04-30-2010, 04:08 PM   #1
UberRex
Scooby Newbie
 
Member#: 237021
Join Date: Jan 2010
Location: Colorado
Vehicle:
2003 WRX Stage 2
WRB

Default Question for anyone running a Gates or similar timing belt.

So I just got done doing the headgaskets on my 03 WRX. While I was in there I replaced the OE timing belt with a Gates "Racing" timing belt. I followed the Subaru directions to a T. Got the motor in an fired up no problem. Heres the issue, cruising at 2.5-3k RPM (any speed, any gear.) if I let off the gas I get a slight belt rubbing like sound. This happens only when I just let of the gas. If I push in the clutch or brake enough the noise stops. I pulled the timing covers off today to double check everything and make sure I left enough room between the belt and belt guides. There are no signs of rubbing on the timing belt at all. I've only put about 80 miles on the car thus far after the new gaskets and belt. Gates states in the parerwork that came with the belt that I may hear an increase in noise from the timing belt, but a rubbing type sound on lift off? Anyone else have this issue? Im hoping the belt just needs to break in a bit. I've triple checked all my work and its solid, any help?
* Registered users of the site do not see these ads.
UberRex is offline   Reply With Quote
Old 04-30-2010, 05:29 PM   #2
Agkelos
Scooby Specialist
 
Member#: 58163
Join Date: Mar 2004
Chapter/Region: MWSOC
Location: Saint Louis
Vehicle:
2002 Stage 2 WRX
World Rally Blue

Default

Any chance you overtightened/undertightened the belt for the AC or alternator?
Agkelos is offline   Reply With Quote
Old 04-30-2010, 05:38 PM   #3
Strider327
Scooby Specialist
 
Member#: 131280
Join Date: Nov 2006
Chapter/Region: BAIC
Location: Northern California Hayward
Vehicle:
2004 Impreza WRX
WRB

Default

Thats weird to hear. I'm about do the same thing as well.
Strider327 is offline   Reply With Quote
Old 04-30-2010, 06:24 PM   #4
dem1k
Scooby Specialist
 
Member#: 146186
Join Date: Apr 2007
Chapter/Region: SCIC
Location: socal
Vehicle:
2002 wrx
psm

Default

About the timing belt guides on the corners of the timing belt assembly did you tighten them within tolerance?

Also they could be angled slightly because the holes are slotted for them.

I would check those as well as the other 2 belts.
dem1k is offline   Reply With Quote
Old 04-30-2010, 08:17 PM   #5
SurferD
Scooby Newbie
 
Member#: 229186
Join Date: Nov 2009
Chapter/Region: NESIC
Location: CT, USA
Vehicle:
2003 WRX wagon
world rally blue

Default

there's a specific tolerance that the guides need to be around the pulleys. I think it's like .002-.005". I used a feeler gage in the middle of the range and put it between the belt and guide then tightened.Your mechanic may have had one end out of tolerance too close.
SurferD is offline   Reply With Quote
Old 04-30-2010, 09:17 PM   #6
UberRex
Scooby Newbie
 
Member#: 237021
Join Date: Jan 2010
Location: Colorado
Vehicle:
2003 WRX Stage 2
WRB

Default

Quote:
Originally Posted by SurferD View Post
there's a specific tolerance that the guides need to be around the pulleys. I think it's like .002-.005". I used a feeler gage in the middle of the range and put it between the belt and guide then tightened.Your mechanic may have had one end out of tolerance too close.
Haha I am a mechanic. I did the work my self. I went ahead and moved the guides a bit further out but to no avail(like I mentioned earlier, there are absolutly no signs of the t belt rubbing the guides.). I did adjust the a/c and alt belt a few times aswell to rule that out.

Last edited by UberRex; 04-30-2010 at 09:42 PM.
UberRex is offline   Reply With Quote
Old 04-30-2010, 10:25 PM   #7
SurferD
Scooby Newbie
 
Member#: 229186
Join Date: Nov 2009
Chapter/Region: NESIC
Location: CT, USA
Vehicle:
2003 WRX wagon
world rally blue

Default

Quote:
Originally Posted by UberRex View Post
Haha I am a mechanic. I did the work my self. I went ahead and moved the guides a bit further out but to no avail(like I mentioned earlier, there are absolutly no signs of the t belt rubbing the guides.). I did adjust the a/c and alt belt a few times aswell to rule that out.
Well I guess you know what you're doing then. Maybe it's the accessory belts.
SurferD is offline   Reply With Quote
Old 04-30-2010, 10:36 PM   #8
soobaviator
NASIOC Supporter
 
Member#: 115070
Join Date: May 2006
Chapter/Region: MAIC
Location: Northern VA
Vehicle:
2009 DGM LGT Spec.B
08 Audi Q7 4.2 PRM

Default

Quote:
Originally Posted by SurferD View Post
there's a specific tolerance that the guides need to be around the pulleys. I think it's like .002-.005". I used a feeler gage in the middle of the range and put it between the belt and guide then tightened.Your mechanic may have had one end out of tolerance too close.
The clearance to the belt guides is 0.5-1.5 mm (.020-.059 in) which is pretty huge relative to just about every other internal tolerance...

You might want to check if the engine itself is moving around by checking pitch stopper and engine mounts...



-soobaviator
soobaviator is offline   Reply With Quote
Old 05-01-2010, 12:23 PM   #9
rkramer
Scooby Guru
 
Member#: 118209
Join Date: Jun 2006
Chapter/Region: MWSOC
Location: North Dakota
Vehicle:
2002 WRX Sedan

Default

did you happen to look at the backside of the plastic covers when you took them off? Just to make sure nothing is rubbing on that.
rkramer is offline   Reply With Quote
Old 05-01-2010, 01:20 PM   #10
J. Steinbeck
Scooby Specialist
 
Member#: 140575
Join Date: Feb 2007
Location: Hotlanta, GA
Vehicle:
2007 Magnum SRT-8

Default

I installed a Gates belt on my own 04 WRX, and really didn't notice any increased noise... especially anything along the lines of a "rubbing" sound.

If you've checked the guides, there's just not really much room for side to side alignment of the belt on the pulleys- I'd be highly surprised if it is rubbing the belt covers. If you recheck and don't see any rub mark on the covers or the belt itself, I'd be tempted to throw that theory out.

My money would be on an accessory belt. Possibly overtightened, but probably under tightened. I've installed a few new belt before leaving what seemed like the proper amount of deflection, only to find that once they ran a few revolutions they stretched enough to start slipping, requiring readjustment of the tensioner.

Just my guess, fwiw.
J. Steinbeck is offline   Reply With Quote
Old 05-02-2010, 01:33 AM   #11
UberRex
Scooby Newbie
 
Member#: 237021
Join Date: Jan 2010
Location: Colorado
Vehicle:
2003 WRX Stage 2
WRB

Default

Quote:
Originally Posted by J. Steinbeck View Post
I installed a Gates belt on my own 04 WRX, and really didn't notice any increased noise... especially anything along the lines of a "rubbing" sound.

If you've checked the guides, there's just not really much room for side to side alignment of the belt on the pulleys- I'd be highly surprised if it is rubbing the belt covers. If you recheck and don't see any rub mark on the covers or the belt itself, I'd be tempted to throw that theory out.

My money would be on an accessory belt. Possibly overtightened, but probably under tightened. I've installed a few new belt before leaving what seemed like the proper amount of deflection, only to find that once they ran a few revolutions they stretched enough to start slipping, requiring readjustment of the tensioner.

Just my guess, fwiw.
Exactly my thoughts as well. If there were enough slack/walk in the belt to move side to side then there would be enough to skip a tooth. It would have done that by now. (200 miles now on the install.) I guess I will keep adjusting the accessory belt. I thought maybe the tensioner pulley was rubbing on the timing cover but no such luck. Its weird, you would think if it is in fact a belt issue it would be a more constant noise, thats what has me stumped.
UberRex is offline   Reply With Quote
Old 05-02-2010, 08:30 AM   #12
Vlad
Scooby Specialist
 
Member#: 46135
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
02 WRX
Powered by Sti V9 Spec C

Default

Quote:
Originally Posted by UberRex View Post
Exactly my thoughts as well. If there were enough slack/walk in the belt to move side to side then there would be enough to skip a tooth. It would have done that by now. (200 miles now on the install.) I guess I will keep adjusting the accessory belt. I thought maybe the tensioner pulley was rubbing on the timing cover but no such luck. Its weird, you would think if it is in fact a belt issue it would be a more constant noise, thats what has me stumped.
Run the car without the A/C belt, for testing. You could run it without the main belt, on battery, for a short distance as well.

There's a known issue with the A/C belt tensioner. If you turn it the wrong way once it's loosened to the max, at reinstallation, there's a plastic piece in the slider on the back, that cracks.
If that happens, the AC tensioner pulley may not sit perpendicular to the belt.
I broke mine, anticipated the dealer may have to order, meanwhile the dealer was selling 1 of these a week..
Vlad is offline   Reply With Quote
Old 05-02-2010, 05:53 PM   #13
UberRex
Scooby Newbie
 
Member#: 237021
Join Date: Jan 2010
Location: Colorado
Vehicle:
2003 WRX Stage 2
WRB

Default

Well the ALT/PWR steering belt was a bit slack after I adjusted it and drove it. I tightened it further so hopefully thats the cause. Its starting to seem like an acc. belt issue all along. I will look into the a/c tensioner further, mine is not rubbing on the timing cover or anything. Thanks for the info guys.
UberRex is offline   Reply With Quote
Old 06-01-2011, 05:29 PM   #14
justooln2
Scooby Newbie
 
Member#: 258482
Join Date: Sep 2010
Default

Quote:
Originally Posted by J. Steinbeck View Post
I installed a Gates belt on my own 04 WRX, and really didn't notice any increased noise... especially anything along the lines of a "rubbing" sound.

Quick question. Did you ever figure this out? I have a NEW HYBRID build here. All new GATES Timing hardware. and after the timing belt install and double checking the alignment. The timing belt is trying to walk off the crank pulley. the idler directly left (when looking from front) has about 1/6" of belt hanging off the front of it. and when rolling the engine over, you can see the belt rubbing quite a bit on the crank pulley, which is a guide, but its not supposed to have enough rubbing to shave my belt. ANY IDEAS as to what the hell is going on here?
justooln2 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
which timing belt is better than the other? GATES or OEM stock belts? 949 Built Motor Discussion 11 07-31-2009 10:21 AM
BRand New Gates Racing SOHC Timing belt for sale-- T304RB WRXINTX Normally Aspirated Powertrain 4 10-11-2008 10:38 AM
Car wont run. Not sure if its timing belt. HELP drapes Newbies & FAQs 29 03-17-2008 11:31 AM
question for anyone running a jvc h/u w/ ipod dlin Car Audio, Video & Security 3 09-14-2006 10:36 AM
Pay shop or DIY Timing Belt Tensioner and inner drive belt erikkellison Service & Maintenance 23 02-26-2005 02:28 AM


All times are GMT -4. The time now is 03:06 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.