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Mike74
Newbie


Joined: 06 Mar 2018
Posts: 12



PostPosted: Wed May 08, 2019 8:53 pm    Post subject: Belt woes Reply with quote

So I’ve just been recovered off the M3, in my unhappy Targa 4, with the accessory drive belt not being attached to the things it needs to be attached to. The belt looks in good nick, so I’m guessing something metal has broken somewhere I can’t see, as I do recall hearing a small clunk earlier about 5 mins earlier, when the steering got stiff. Are there any common bit that end to go, or is this a likely one off?
 
  
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kurlykris
Magny-Cours


Joined: 30 Jun 2014
Posts: 2524
Location: Warwickshire


PostPosted: Wed May 08, 2019 9:28 pm    Post subject: Reply with quote

My guess would be either 3 upper idler pulley, 8 lower idler pulley or 7 tensioner pulley (most common) has failed.

No5 on this photo is the air con compressor not fitted.



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2006 Boxster S sport chrono
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shabs
Monza


Joined: 28 Mar 2014
Posts: 182
Location: Teddington


PostPosted: Wed May 08, 2019 9:52 pm    Post subject: Reply with quote

Sounds like its one of the idler or tensioner pulleys that may have snapped clean off...it happened to me a few weeks back.

If that's the case they will need to remove the stud that's left in the engine block. Space is tight but its possible to do, i.e. no engine drop required, just small hands and some nifty tools!

Demort has posted on this issue several times.
 
  
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Cannop
Trainee


Joined: 27 Feb 2018
Posts: 78
Location: Berks/Oxon border


PostPosted: Thu May 09, 2019 6:54 am    Post subject: Reply with quote

I'd say a pulley's disintegrated or a pulley bolt's snapped. On my car the upper idler pulley blew itself apart a couple of months ago.


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Mike74
Newbie


Joined: 06 Mar 2018
Posts: 12



PostPosted: Thu May 09, 2019 6:58 am    Post subject: Reply with quote

Thanks for the replies guys, calling the garage now...
 
  
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Mike74
Newbie


Joined: 06 Mar 2018
Posts: 12



PostPosted: Thu May 09, 2019 4:36 pm    Post subject: Reply with quote

Yep Kurkykris, numbers 7 and 8 gone, all being fixed tomorrow.
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7285
Location: Brighton


PostPosted: Thu May 09, 2019 6:37 pm    Post subject: Reply with quote

The ones i've been banging on about and trying to get everyone who has one to get it checked is the gen 2 997 .. a different system from the above and one that can potentially cost you an awful lot of money should it fail .. and they do .

If you have a Boxster or Cayman gen 2 ( dfi engine ) then don't worry .. these don't seem to fail .
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Mike74
Newbie


Joined: 06 Mar 2018
Posts: 12



PostPosted: Fri May 10, 2019 11:58 am    Post subject: Reply with quote

Mine's cost £400 for the two pulleys (if that's the right term) and a new belt, including labour and VAT.

Just wish they'd hurry up and deliver it back, I want to go and get some lunch!
 
  
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Cannop
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Joined: 27 Feb 2018
Posts: 78
Location: Berks/Oxon border


PostPosted: Fri May 10, 2019 1:20 pm    Post subject: Reply with quote

That's not bad at all, mine cost £293.78 for three new pulleys, bolts and washers and a new belt, all OEM parts, but that was with me doing the work.
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Mike74
Newbie


Joined: 06 Mar 2018
Posts: 12



PostPosted: Fri May 10, 2019 1:35 pm    Post subject: Reply with quote

The £400 included a £65 recovery charge for them to pick up from my place and deliver back.

Belt = £35.38 +VAT
Labour = 1.5 hrs @£65 ph
Tensioner roller = £67.22 +VAT
Deflection roller = £64.77 +VAT
Consumables = £5.00 (bolts & washers?)

Grand total £401.84

Oh, and they washed it too, saves me a job this weekend. thumbsup
 
  
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Cannop
Trainee


Joined: 27 Feb 2018
Posts: 78
Location: Berks/Oxon border


PostPosted: Fri May 10, 2019 3:55 pm    Post subject: Reply with quote

Even better! Thumb
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160dmb
Monza


Joined: 19 Aug 2014
Posts: 157



PostPosted: Fri Jun 14, 2019 2:09 pm    Post subject: Reply with quote

Hey deMort - i have a 997.2 what am I looking for? I just tried searching back through your posts but gave up at mid-April - blimey you have a lot of posts!
 
  
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Luddite
Nürburgring


Joined: 18 Dec 2018
Posts: 459
Location: Scotland


PostPosted: Sun Jun 16, 2019 1:23 pm    Post subject: Reply with quote

Great pics Cannop, thanks for sharing, though they say a pic is worth a thousand words, but (like 160dmb) not having found the advantage of Mr DeMort`s earlier contributions on the matter, might I ask if you think/know that the pulley destruction was as the result of the bearing failing to some degree causing the plastic pulley to slip on the outer bearing surface and overheat to eventually fracture... or that the pulley material was not up to the job long term, or is it possible that any belt issues might have been the original source of the problem.

I replaced a very well worn idler wheel bearing on my friends hard driven and high mileage 928 many years ago, fortunately the wheel was steel thus no chance of it breaking up even though the bearing was audibly rumbling..I think he was lucky not to throw the cam belt with all that might have followed on from that.. Surprised
 
  
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kurlykris
Magny-Cours


Joined: 30 Jun 2014
Posts: 2524
Location: Warwickshire


PostPosted: Sun Jun 16, 2019 1:58 pm    Post subject: Reply with quote

160dmb wrote:
Hey deMort - i have a 997.2 what am I looking for? I just tried searching back through your posts but gave up at mid-April - blimey you have a lot of posts!


Here you go 160dmb Thumb

http://911uk.com/viewtopic.php?t=132158&highlight=997
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Windy101
Spa-Francorchamps


Joined: 05 Jun 2015
Posts: 268



PostPosted: Mon Jun 17, 2019 7:31 am    Post subject: Reply with quote

160dmb wrote:
Hey deMort - i have a 997.2 what am I looking for? I just tried searching back through your posts but gave up at mid-April - blimey you have a lot of posts!


http://911uk.com/viewtopic.php?t=132158
 
  
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Luddite
Nürburgring


Joined: 18 Dec 2018
Posts: 459
Location: Scotland


PostPosted: Mon Jun 17, 2019 8:41 am    Post subject: Reply with quote

There seems to be a bit of confusion (or is it just me..?) as to whether this post relates to the possibility of the belt tensioner seizing on it`s pivot point.... or relates to the failure of any of the pulley wheels, as seems to have been the unfortunate case for both the OP Mike74 and Cannop...?

BTW thanks for posting the Pelican parts pic kurlykris given it displays so much and so clearly. Thumb
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7285
Location: Brighton


PostPosted: Mon Jun 17, 2019 7:08 pm    Post subject: Reply with quote

Luddite wrote:
There seems to be a bit of confusion (or is it just me..?) as to whether this post relates to the possibility of the belt tensioner seizing on it`s pivot point.... or relates to the failure of any of the pulley wheels, as seems to have been the unfortunate case for both the OP Mike74 and Cannop...?

BTW thanks for posting the Pelican parts pic kurlykris given it displays so much and so clearly. Thumb


It's the tensioner that seizes and not a idler pulley failure on the gen 2 997 .. see the link here please , hopefully it will answer any questions but if not then feel free to ask Smile

http://911uk.com/viewtopic.php?t=132158

This thread is about the gen 1 , i was mentioned in a post so answered my comments are about the gen 2 which is a totally different beast Very Happy
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My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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Luddite
Nürburgring


Joined: 18 Dec 2018
Posts: 459
Location: Scotland


PostPosted: Tue Jun 18, 2019 6:08 am    Post subject: Reply with quote

Iain, many thanks for taking the time to reply... It does seem that there may be confusion as on this particular thread..?

"Belt woes" the first post was that of Mike74 describing hearing a clunk and the steering becoming heavy..? It seems that he describes pulleys 7 and 8 as in the Pelican Parts image as "gone."

Adding to those "belt woes" it seems Cannop had pulley failures where he provided a pic of broken pulley wheels, which may or may not be a similar failure to that which caused Mike74`s car to suffer "gone" pulleys... ???

My interest was in trying to gain understanding as to what caused the plastic pulleys to break up..?

I think I understand from that which you type that the tensioning pulley pivot point on the Ver.2 997 is more prone to seizing than on the Ver.1 due to the difference in location in terms of exposure to corrosive influences, though wonder how that relates to possible belt failures or pulley destruction.. Question
 
  
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Cannop
Trainee


Joined: 27 Feb 2018
Posts: 78
Location: Berks/Oxon border


PostPosted: Tue Jun 18, 2019 7:54 am    Post subject: Reply with quote

Luddite wrote:
Great pics Cannop, thanks for sharing, though they say a pic is worth a thousand words, but (like 160dmb) not having found the advantage of Mr DeMort`s earlier contributions on the matter, might I ask if you think/know that the pulley destruction was as the result of the bearing failing to some degree causing the plastic pulley to slip on the outer bearing surface and overheat to eventually fracture... or that the pulley material was not up to the job long term, or is it possible that any belt issues might have been the original source of the problem.


It's difficult to say for sure but the when I checked all the pulley bearings were turning with no roughness after I'd removed them. My belt wasn't that old (three years) so I can only assume the plastic pulley had a fault or had been damaged by something eventually causing it to disintegrate. The odd thing was I had no loss of power steering or overheating but at the beginning the final 90 mile journey I had a bit of belt squeal when I started the engine. I just happened to inspect the engine the next day before using the car to check there was nothing seriously amiss and found the upper idler pulley disintegrated and the belt a lot narrower from missing two of it ribs.
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Hertsdriver
Nürburgring


Joined: 12 Nov 2018
Posts: 379
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Tue Jun 18, 2019 8:37 am    Post subject: Reply with quote

Is there a specific pulley/bearing or idler that is prone to potential failure on Gen 1 engines? I would like to change my drive belt and while I am there might as well change anything else that is known to be suspect...
thanks
 
  
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