Notices
General Technical
Sponsored by:
Sponsored by: CARiD

Cosworth belt owners

Thread Tools
 
Search this Thread
 
Old 07 December 2011 | 11:21 AM
  #1  
Stevesbluewrx's Avatar
Stevesbluewrx
Thread Starter
Scooby Regular
iTrader: (4)
 
Joined: Aug 2005
Posts: 3,662
Likes: 0
From: Also known as The Gimp
Default Cosworth belt owners

Anyone with a Cosworth belt recently removed the cover to check the belt out after say 1k - 3k miles?

Whilst mine is off the road at present took at look with Dan at Surrey Subaru Specialists.

Was suprised to see the top layer BLUE clearing coming off and going on the idlers. So the idlers now look blue from the belt!!

Anyone know the reason for this or anything to worry about?


Steve
Old 07 December 2011 | 11:37 AM
  #2  
TheVoices's Avatar
TheVoices
Scooby Regular
iTrader: (5)
 
Joined: Oct 2003
Posts: 2,640
Likes: 14
From: Nelson, Lancashire
Default

Possibly rubbing against the guides at the corners of the belt covers ?

I can't remember what the clearance is supposed to be but I had the same thing happen with a standard belt, loads of black rubber 'shavings' around the guides.

Adjusted the clearance and problem solved !
Old 07 December 2011 | 11:41 AM
  #3  
Stevesbluewrx's Avatar
Stevesbluewrx
Thread Starter
Scooby Regular
iTrader: (4)
 
Joined: Aug 2005
Posts: 3,662
Likes: 0
From: Also known as The Gimp
Default

Originally Posted by TheVoices
Possibly rubbing against the guides at the corners of the belt covers ?

I can't remember what the clearance is supposed to be but I had the same thing happen with a standard belt, loads of black rubber 'shavings' around the guides.

Adjusted the clearance and problem solved !
Good point matey. There is no debris/shavings just the blue off the belt? That's what is odd.

Steve
Old 07 December 2011 | 11:52 AM
  #4  
Shaks-STI's Avatar
Shaks-STI
Scooby Regular
iTrader: (7)
 
Joined: Aug 2009
Posts: 1,877
Likes: 0
From: Leicester
Default

Originally Posted by TheVoices
Possibly rubbing against the guides at the corners of the belt covers ?

I can't remember what the clearance is supposed to be but I had the same thing happen with a standard belt, loads of black rubber 'shavings' around the guides.

Adjusted the clearance and problem solved !
I had the same issue and it was rubbing on the guide that is located on the centre
Old 07 December 2011 | 01:50 PM
  #5  
PeeVee's Avatar
PeeVee
Scooby Regular
iTrader: (1)
 
Joined: Dec 2000
Posts: 1,496
Likes: 0
From: Canterbury. Kent
Default

Originally Posted by TheVoices
I can't remember what the clearance is supposed to be!
The clearence between the belt and the guides should be 1mm +/- 0.5mm
Old 07 December 2011 | 02:56 PM
  #6  
**jay**'s Avatar
**jay**
Scooby Regular
iTrader: (1)
 
Joined: Jun 2003
Posts: 2,374
Likes: 10
From: scotland
Default

Think he is meaning the blue top coating on the belt, never used one so not sure if its normal, its not over tight is it?
Jay
Old 10 December 2011 | 08:07 PM
  #7  
Stevesbluewrx's Avatar
Stevesbluewrx
Thread Starter
Scooby Regular
iTrader: (4)
 
Joined: Aug 2005
Posts: 3,662
Likes: 0
From: Also known as The Gimp
Default

Originally Posted by **jay**
Think he is meaning the blue top coating on the belt, never used one so not sure if its normal, its not over tight is it?
Jay
Exactly my point. Belt looks ok etc.

Steve
Old 10 December 2011 | 08:15 PM
  #8  
Cannon Fodder's Avatar
Cannon Fodder
Scooby Regular
iTrader: (100)
 
Joined: Oct 2008
Posts: 13,684
Likes: 0
From: Planet Earth
Default

I had this very problem with my Cosworth belt but it had gone a little further and the guide had started to rub through the belt, the outer rubber banding had started to lift/rip.

I think it's safe to say that my belt guide was out of adjustment and by the sounds of it so is yours.
Old 11 December 2011 | 08:15 AM
  #9  
Scooby Dan's Avatar
Scooby Dan
Scooby Regular
 
Joined: Nov 2004
Posts: 825
Likes: 0
Default

I had the same issue with one of the pink STI belts . I had it replaced with a standard one while the engine was out for a rebuild .
Old 12 December 2011 | 04:17 PM
  #10  
legacydan's Avatar
legacydan
Scooby Regular
 
Joined: Jul 2007
Posts: 133
Likes: 6
From: Guildford
Default

Here's a picture of steves cosworth belt, as you can see both idlers & the tensioner are coated with blue from the belt, this is due to incorrect clearance on the cosworth deflect guide, a 1mm feeler gauge doesn't even fit between the guide & belt.

Old 12 December 2011 | 04:25 PM
  #11  
ALi-B's Avatar
ALi-B
Moderator
iTrader: (1)
 
Joined: Apr 2002
Posts: 38,047
Likes: 301
From: The hell where youth and laughter go
Default

I would say thats not right, a normal belt would wear a little on the top, i.e the writing would come off, but it shouldn't leave a build up on the pulleys like that IMO. I would check the warranty of the belt. Also make sure none of the idlers are sticky/seizing causing them to drag on the belt.

If the guide is rubbing, this will be clear when you remove the guide and look underneath. Common error to be made when setting the clearance (it moves when torquing up the bolts).


Gates OEM belts are warrantied for the duration of the cambelt change interval (i.e 5yrs 60K ). I seem to recall somewhere that Cosworth belts are only warrantied for 12months (even though they are made by Gates and rebranded ). I would appreciate if any belt Cosworth belt owners can posts the warranty details up that came with the belt to confirm this as retailers seem to go very quiet when I ask this.

Last edited by ALi-B; 12 December 2011 at 04:32 PM.
Old 12 December 2011 | 04:41 PM
  #12  
legacydan's Avatar
legacydan
Scooby Regular
 
Joined: Jul 2007
Posts: 133
Likes: 6
From: Guildford
Default

Originally Posted by ALi-B
I would say thats not right, a normal belt would wear a little on the top, i.e the writing would come off, but it shouldn't leave a build up on the pulleys like that IMO. I would check the warranty of the belt. Also make sure none of the idlers are sticky/seizing causing them to drag on the belt.

If the guide is rubbing, this will be clear when you remove the guide and look underneath. Common error to be made when setting the clearance (it moves when torquing up the bolts).


Gates OEM belts are warrantied for the duration of the cambelt change interval (i.e 5yrs 60K ). I seem to recall somewhere that Cosworth belts are only warrantied for 12months (even though they are made by Gates and rebranded ). I would appreciate if any belt Cosworth belt owners can posts the warranty details up that came with the belt to confirm this as retailers seem to go very quiet when I ask this.
Your correct it's not right, this is what i have found after taking Steve's car apart while it's in for some other work, needless to say it won't be going back together with that timing belt & idlers & tensioner as with a new belt it will cause that to run high due to the build up on them. I just managed to fit a 0.30mm feeler gauge between the belt & deflect plate so it's way to low.
Old 12 December 2011 | 07:36 PM
  #13  
KAS35RSTI's Avatar
KAS35RSTI
Scooby Regular
iTrader: (73)
 
Joined: May 2009
Posts: 5,923
Likes: 10
From: 2.0 bar
Default

Same issue i had with my old belt. Rubbing against the guide. Just check for slack aswell.

Last edited by KAS35RSTI; 12 December 2011 at 07:40 PM.
Old 12 December 2011 | 07:57 PM
  #14  
Stevesbluewrx's Avatar
Stevesbluewrx
Thread Starter
Scooby Regular
iTrader: (4)
 
Joined: Aug 2005
Posts: 3,662
Likes: 0
From: Also known as The Gimp
Default

Thanks for posting the pic Dan.

Yeah bit of a ball ache. Bit gutted as its only been on since April.

On the case thanks to Dan's assistance car should be on the road again soon.

Steve
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
KAS35RSTI
Subaru
27
04 November 2021 07:12 PM
Abx
Subaru
22
09 January 2016 05:42 PM
Jonny mac
ScoobyNet General
10
09 October 2015 12:25 PM
Brzoza
Engine Management and ECU Remapping
1
02 October 2015 05:26 PM
sti 360
General Technical
6
02 October 2015 09:39 AM



Quick Reply: Cosworth belt owners



All times are GMT +1. The time now is 04:28 PM.