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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Sun Mar 29, 2015 6:39 pm    Post subject: Aux Belt Idelers - Re-Bearing Reply with quote

I have the engine pulled from my '99 996 C2 at present, giving her a well-earned birthday (see my other thread).

I always thought the aux belt idlers looked and sounded like they'd seen better days.

The outer surface (over which the belt runs) is corroded on both idlers, and after removing said belt - I can feel wear in the bearings - again on both.

They looked like original fitments and ideally need replacement.
They are a little loose and sound like the wheels on a toy car.

Like they say "a fool and their money are soon parted" - so decided to see if there's a smarter way to do this job.

The list price for the idlers is £70-80 each....and that makes it expensive for some parts that could be refurbished.

The pulley is a pressed steel item and nothing really *special*.



After removing the pulley from the bolt, spacer/stand-off and cover washer, it leaves effectively two parts:

* The pulley
* The bearing



Using my 60-quid hydraulic press, the bearing of one pulley was carefully pressed out....without distorting the pulley itself.



The bearing is a "FAG" brand although the numbers mean zippo, I have managed to find the equivalent bearing - It's a dual deep race angular contact bearing with rubber seals.

There are plenty of bearing suppliers out there and I'm going to be on the phone to a couple on Monday morning, to see what options there are.

I see no real point me putting a bearing in there that'll be perfect beyond my lifetime, so I want to perhaps strike a balance of life & reliability versus cost.

If the FAG bearings are original - which I believe they are, then they have lasted 16 years and 86k miles.

I'm happy to get something that'll last say 50k, as the time to replace the bearing is a matter of less than an hour including removal of the belt.



Watch this space.......
 
  
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Chris_in_the_UK
Estoril


Joined: 19 Mar 2014
Posts: 3589
Location: Harrogate


PostPosted: Sun Mar 29, 2015 6:59 pm    Post subject: Reply with quote

Great stuff! thumbsup

Looking forward to the follow ups.
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17144
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 29, 2015 7:24 pm    Post subject: Reply with quote

Googling the part number comes up with a few bearing sites.

Designation: 575168 E ➀
Type: Angular contact ball bearings. Multi row, incl. matched sets of single row. Complete.

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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Sun Mar 29, 2015 7:31 pm    Post subject: Reply with quote

alex yates wrote:
Googling the part number comes up with a few bearing sites.

Designation: 575168 E ➀
Type: Angular contact ball bearings. Multi row, incl. matched sets of single row. Complete.


Every lead i followed came to dead ends.

In any case i have got the specs using my micrometer and just need to drill down into expert advice on longevity with the cheaper bearings.
 
  
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17144
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 29, 2015 7:43 pm    Post subject: Reply with quote

I'd try contacting Simply Bearings Ltd ~ Oil Seals SKF FAG TIMKEN KOYO ...
www.simplybearings.co.uk/

They come up near top of the list when just searching the number, so it must be a bearing they deal with.
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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Sun Mar 29, 2015 7:48 pm    Post subject: Reply with quote

alex yates wrote:
I'd try contacting Simply Bearings Ltd ~ Oil Seals SKF FAG TIMKEN KOYO ...
www.simplybearings.co.uk/

They come up near top of the list when just searching the number, so it must be a bearing they deal with.


As it happens they are top of my contact list tomorrow lol Smile

Leave it to me Smile
 
  
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17144
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 29, 2015 7:50 pm    Post subject: Reply with quote

Pop Corn Thumb
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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Sun Apr 19, 2015 10:03 am    Post subject: Reply with quote

Got a bearing off eBay for now.....£10

3202-2RS

Pressed into revitalised pulley......





Have also given other two pulleys a clean, prep and paint.

The belt contact surface on all of them was "rusted" so have just cleaned it down with wet/dry media and then wd40'd it for now.



All refitted now and feel great - nice and quiet unlike the one original bearing that was loose and dry / noisy.
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Mac996t
Montreal


Joined: 26 Mar 2011
Posts: 515


2004 Porsche 996 Turbo

PostPosted: Sun Apr 19, 2015 2:04 pm    Post subject: Reply with quote

Good work, I love threads like these where people find ways to make Porsche ownership cheaper and avoid the dreaded Porsche tax!!!

PS did you think about painting the surface you've wet and dried to slow down the rust coming back?

Mac
 
  
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diverzeusy
Suzuka


Joined: 10 Nov 2012
Posts: 1050
Location: Doncaster UK


PostPosted: Sun Apr 19, 2015 7:57 pm    Post subject: Reply with quote

Just curious but,
does is it not make more sense to fit the more expensive bearing that will probably outlast the car?, i.e.last 'forever' or are they vastly more expensive for a slight gain in quality? Confused
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steve r
Monza


Joined: 26 Sep 2011
Posts: 227



PostPosted: Thu May 07, 2015 9:36 pm    Post subject: Reply with quote

What sort of noise were you getting before changing the bearings?

I'm getting a loud squeaking from my belt area. The belt and water pump were replaced a few years ago and the alternator is only around 6 months old so i'm suspecting an idler bearing.

Did you ever track down a supplier of the original part number bearings?
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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Fri May 08, 2015 1:10 pm    Post subject: Reply with quote

Mac996t wrote:

PS did you think about painting the surface you've wet and dried to slow down the rust coming back?

Mac


I am going to see how it goes......I just assumed the original wasn't painted.
I'll coat with PTFE or similar for now.
Good point though!
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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Fri May 08, 2015 1:12 pm    Post subject: Reply with quote

steve r wrote:
What sort of noise were you getting before changing the bearings?

I'm getting a loud squeaking from my belt area. The belt and water pump were replaced a few years ago and the alternator is only around 6 months old so i'm suspecting an idler bearing.

Did you ever track down a supplier of the original part number bearings?


Not a squeake - just a dry bearing race kinda sound.....like an old rollerskate.
If your tensioner / idlers are dried out severely, it could squeake I guess.

The original bearing is a FAG make and the number is a "protected" spec, specially made apparently......just to ensure people don't do what I've just done!
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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Fri May 08, 2015 1:13 pm    Post subject: Reply with quote

diverzeusy wrote:
Just curious but,
does is it not make more sense to fit the more expensive bearing that will probably outlast the car?, i.e.last 'forever' or are they vastly more expensive for a slight gain in quality? Confused


I can replace it three times before I get close to the cost of a supposed "lifetime" bearing.......and who's to say what "lifetime" equates to in terms of revolutions?
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DaveR6
Trainee


Joined: 19 Feb 2015
Posts: 96
Location: Stoke on trent


PostPosted: Fri Aug 28, 2015 12:47 pm    Post subject: Reply with quote

Hi systemiser, we're all tension era 3202 bearings, mine sound a bit iffy, so want to replace them,
Cheers
Dave
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systemmeister
Spa-Francorchamps


Joined: 25 Jun 2014
Posts: 321
Location: Northants


PostPosted: Fri Aug 28, 2015 1:18 pm    Post subject: Reply with quote

DaveR6 wrote:
Hi systemiser, we're all tension era 3202 bearings, mine sound a bit iffy, so want to replace them,
Cheers
Dave


Did you mean - "are all tensioners same 3202 bearing" the answer's yes! lol
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Harv
Suzuka


Joined: 18 Sep 2014
Posts: 1204



PostPosted: Fri Aug 28, 2015 3:03 pm    Post subject: Reply with quote

Identical type of bearing to the single row IMS one.

If you do this before they dry out and fail the bearings can be regressed, pick the dust shield and re-pack

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DaveR6
Trainee


Joined: 19 Feb 2015
Posts: 96
Location: Stoke on trent


PostPosted: Sat Aug 29, 2015 7:37 am    Post subject: Reply with quote

Thanks gents, new job on my to do list, apologies for typos, iPad self correcting is great Question
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Ghaur
Newbie


Joined: 30 Nov 2019
Posts: 1



PostPosted: Sat Nov 30, 2019 11:39 am    Post subject: Reply with quote

Hello Systemmeister,
I dig up this post but I wanted to know if the new bearing that you had put in place had worked well over time because it seems that the original bearing FAG 575168E is a piece specially made for Porsche and that maybe it was necessary special specifications for working on a pulley ...
In addition, do not you think that a 3202-2RS-C3 bearing with a larger residual clearance and thus a higher rotational speed tolerance is not a better choice for this part?
Thanks for your feedback.
 
  
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NedHan79
Hockenheim


Joined: 08 Nov 2018
Posts: 679



PostPosted: Sat Nov 30, 2019 11:59 am    Post subject: Reply with quote

Just found this thread. I have a whine which I suspect is possibly an idler or ps pump. I’ll be dropping the engine so will give them a once over then. Thanks for the bearing info. Great job
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