home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > maintenance & nonperformance

Reply
 
Thread Tools Display Modes
Old 05-06-2011, 02:38 PM   #1
Henry10
Board Member
 
Join Date: Feb 2011
Location: NY, NY
Default Timing Belt taking a walk

I did the timing belt job about 4 weeks (2000 miles) ago. No problems then. Timing Belt: Continental, Water Pump: Aisin, Idler Unit: GMB, Tensioner (incl. Roller): GMB, and Damper (Aisin). All from FCP, except Water Pump.

About 10 days ago noticed that timing belt "walks" back-and-forth about 1/8" on the tensioner pulley. I re-did the job last weekend, re-installed everything with the torque wrench, now belt walks less, but still does, maybe 1/16". They only thing I could not put a torque wrench is the Damper (hydraulic), some people call it Tensioner, Volvo calls it Damper. Volvo calls "Tensioner" the one that has the roller on.

There is still a faint chirp, which correlates with the rhythm of the "walk".

1- The only thing I did not tighten or re-tighten is the tensioner pulley -- Tensioner came as a unit (GMB). I did tighten (according to specs) the tensioner only bolt (T-45) which bolts it to the block, and which swivels.

2- The Timing Belt cover, on top, by the 2 cam pulleys, is too close to the belt, but barely misses it. I was able to slide a sheet paper in between belt and cover, but yet a little too close IMO. It was like that before.

Anybody has any ideas? All old parts are thrown away.
Henry10 is offline   Reply With Quote
Old 05-06-2011, 03:04 PM   #2
icebrick
one lesson after another
 
icebrick's Avatar
 
Join Date: Apr 2005
Location: ON Canada
Default

I had the same issue but more pronounced. My problem was that the crank pulley was not seated fully against the crank.

My thread here
__________________
Quote:
Originally posted by Barefoot
A low-mile Volvo is really only a psychological benefit.
kind of cool, but still grandpas' car
icebrick is offline   Reply With Quote
Old 05-06-2011, 03:06 PM   #3
Harlard
80/20 speed parts club
 
Harlard's Avatar
 
Join Date: May 2007
Location: PDX
Default

Check for everything to be tight enough. Timing belts walk when gears aren't seated well or when the tensioner isn't tight enough.
__________________


Herr Harlard am Erstens

1979 242 DL

Quote:
Originally Posted by t8fanning View Post
My knob has a big chunk of steel on it
Harlard is online now   Reply With Quote
Old 05-06-2011, 03:35 PM   #4
Henry10
Board Member
 
Join Date: Feb 2011
Location: NY, NY
Default

I had no leaks, so I did not take any of the cam or crank pulleys off. Old belt did not walk. I suspect the FCP's GMB Tensioner with roller too; here is a view of it http://www.eeuroparts.com/Main/PartD...spx?id=9135555.
Henry10 is offline   Reply With Quote
Old 05-06-2011, 04:16 PM   #5
nathaninwa
The Beloved Oarnge Juice
 
nathaninwa's Avatar
 
Join Date: Aug 2009
Location: WA
Default

I had this happen too. End result was a bad belt. Mine walked only in one spot tho. Watch your belt for the walk pattern.....the spin it around and see if it walks the other way or not. If it does then its the belt.....if not then you have something all twacked out.
Then maybe try your old belt and see.
__________________
962j 815/692@27psi

SHEETMETAL INTAKEhttp://forums.turbobricks.com/showth...etmetal+intake

THIS IS FORSALE V
nathaninwa is offline   Reply With Quote
Old 05-07-2011, 08:15 AM   #6
Henry10
Board Member
 
Join Date: Feb 2011
Location: NY, NY
Default

Quote:
Originally Posted by Nathaninwa View Post
I had this happen too. End result was a bad belt. Mine walked only in one spot tho. Watch your belt for the walk pattern.....the spin it around and see if it walks the other way or not. If it does then its the belt.....if not then you have something all twacked out.
Then maybe try your old belt and see.
Since I had no issues for the first 2-3 weeks, including a 1500 miles trip, I threw everything away. Good advice, I will try to check the belt (Continental).
Henry10 is offline   Reply With Quote
Old 05-07-2011, 11:00 AM   #7
nathaninwa
The Beloved Oarnge Juice
 
nathaninwa's Avatar
 
Join Date: Aug 2009
Location: WA
Default

i would also take vidieo of it....so if there is a warranty issue on the belt, the supplier can see in person. I did this same thing, and my Kevlar belt was replaced no questions.
nathaninwa is offline   Reply With Quote
Old 08-27-2019, 12:32 AM   #8
lucky5
Newbie
 
Join Date: Aug 2019
Location: USA/ATLANTA
Default walking timing belt

Quote:
Originally Posted by Henry10 View Post
Since I had no issues for the first 2-3 weeks, including a 1500 miles trip, I threw everything away. Good advice, I will try to check the belt (Continental).
Hi Henry,
how did you resolve the issue of walking timing belt?
Thanks
lucky5 is offline   Reply With Quote
Old 08-27-2019, 09:12 AM   #9
buzz
To inspamity, and beyond!
 
buzz's Avatar
 
Join Date: Jul 2002
Location: W34
Default

Quote:
Originally Posted by lucky5 View Post
Hi Henry,
how did you resolve the issue of walking timing belt?
Thanks
Henry hasn't been here in like 7 years.
__________________
Quote:
Originally Posted by Råda View Post
I usually don't get compliments on my penis from guys, but thanks!
I used to be indecisive. Now I'm not so sure.


The Phoenix
buzz is offline   Reply With Quote
Old 09-01-2019, 11:21 PM   #10
summer_sky
Board Member
 
summer_sky's Avatar
 
Join Date: Jun 2019
Location: Pennsylvania, USA
Default

Quote:
Originally Posted by lucky5 View Post
Hi Henry,
how did you resolve the issue of walking timing belt?
Thanks
Quote:
Originally Posted by buzz View Post
Henry hasn't been here in like 7 years.
Don't feel badly, Lucky... I just sent a Friend Request to someone who hasn't been here in a decade
__________________
"humility advances Life's ambitions" - Unknown

"There is no reward for settling for something you do not want." - John Mellencamp
summer_sky is offline   Reply With Quote
Old 09-08-2019, 05:06 PM   #11
lucky5
Newbie
 
Join Date: Aug 2019
Location: USA/ATLANTA
Default

Ok, Here is the link to the video on Youtube:https://www.youtube.com/watch?v=ds9b5X2Ik1Y
Local Atlanta shop installed new timing belt (Gates) with water pump (Gates) and new tensioner, pulleys from ASIN (TKV-004) kit. The belt walks - it's a small axial movement about 1mm. You can see the belt hanging out over the edge of the tensioner pulley - about 1 mm. Car runs fine, no issues. Old Volvo belt was centered, it looks actually better than the new one from Gates. It was 10 years old and about 60 000 miles. I wonder if this lateral movement is acceptable? Is there some tolerance for the lateral movement? Anyone looked at their belt while the car is idling? Thanks for your comments!
For impatient people:
Pictures of timing belt 0:00 to 1:30 minute
From 1:30 minute: Video showing the tension of the timing belt and later on: video of the belt while the car is running. Please slow down the video; you might be able to see the axial movement better.
lucky5 is offline   Reply With Quote
Old 09-11-2019, 12:29 PM   #12
DET17
Reformed SAABaholic
 
Join Date: Nov 2009
Location: NW Georgia
Default

Typical timing belt system design dictates one pulley to be flanged (which retains the belt from walking) while the second (or third ) pulley is naked; unflanged.

When in motion the belt will center on the flanged pulley and then float to a happy position on the other pulley(s). If all pulleys were flanged and out of plane OR parallel with one another, the belt will self destruct. I believe the crank pulley is flanged on my redblock; the aftermarket B230 cam pulleys are naked for this reason.
__________________
Project "cheap thrills" build thread: http://forums.turbobricks.com/showth...67#post4211467

Feedback thread: http://forums.turbobricks.com/showthread.php?t=198746
DET17 is offline   Reply With Quote
Old 09-11-2019, 12:50 PM   #13
Harlard
80/20 speed parts club
 
Harlard's Avatar
 
Join Date: May 2007
Location: PDX
Default

OP is tripping. That belt looks completely normal.
Harlard is online now   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 On

Forum Jump


All times are GMT -4. The time now is 12:48 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.