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Ross997
Newbie


Joined: 20 Sep 2018
Posts: 8



PostPosted: Thu Sep 20, 2018 6:56 am    Post subject: IMS bearing advice 2006 Carrera S Reply with quote

Hi all,

I have just purchased a 2006 car here in Bahrain. It's only done 50k miles and been meticulously maintained with oil changes every 2-3k miles .

Am I right in saying 2006 cars had stronger bearing and failure rate is relatively rare?. Anything to look out for? the exhaust tips are free of black residue and no ticking on tick over .

Regards
 
  
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GMG
Silverstone


Joined: 07 Jan 2018
Posts: 110
Location: Devon


PostPosted: Thu Sep 20, 2018 7:06 am    Post subject: Reply with quote

...from what I have read the 3.8s had issues (common) with bore scoring? Rather than IMS related problems??

Someone from this forum recently commented that he had 5 mates with 997s (3.8s ?) and they all required engine rebuilds?
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13828
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Sep 20, 2018 7:10 am    Post subject: Reply with quote

Ticking and black exhaust tips are signs of bore scoring.

IMS bearing failure is extremely rare on any 911 variants and virtually non existent on yours......forget about it and worry about bore scoring instead thumbsup
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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Ross997
Newbie


Joined: 20 Sep 2018
Posts: 8



PostPosted: Thu Sep 20, 2018 7:41 am    Post subject: Reply with quote

Thanks. Sound advice . So symptoms of bore scoring are ticking and black residue on pipes?.
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13828
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Sep 20, 2018 7:51 am    Post subject: Reply with quote

Yes. Go on youtube for some good (bad) examples.
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Ross997
Newbie


Joined: 20 Sep 2018
Posts: 8



PostPosted: Thu Sep 20, 2018 7:55 am    Post subject: Reply with quote

Thank you .
 
  
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Poker2009
Imola


Joined: 09 Sep 2009
Posts: 843
Location: London


PostPosted: Fri Sep 21, 2018 6:48 am    Post subject: Reply with quote

There are a fair few people on here that have reported IMS failure from around 70k+ miles.

Although larger bearings are much stronger, if originally fitted they will still have the seals on them.

Not convinced it should be written off as a "don't worry about it".
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13828
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Fri Sep 21, 2018 6:51 am    Post subject: Reply with quote

Poker2009 wrote:
There are a fair few people on here that have reported IMS failure from around 70k miles


Question

Really?

I think I can recall about 2 in 4.5 years.
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GMG
Silverstone


Joined: 07 Jan 2018
Posts: 110
Location: Devon


PostPosted: Fri Sep 21, 2018 7:13 am    Post subject: Reply with quote

...My recent rebuild includes the latest IMS shaft,bearing and front cover plate available from Porsche thus hope this version isn't as fragile!
 
  
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Poker2009
Imola


Joined: 09 Sep 2009
Posts: 843
Location: London


PostPosted: Fri Sep 21, 2018 7:28 am    Post subject: Reply with quote

alex yates wrote:
Poker2009 wrote:
There are a fair few people on here that have reported IMS failure from around 70k miles


Question

Really?

I think I can recall about 2 in 4.5 years.


Here is one (GMG) out of your two in the last four years - there are certainly more.

GMG - I am not sure what front cover plate is, but if it were rebuilt at Hartech, they would have taken off the outer seal (maybe inner also, I am not sure) of the bearing, AFAIK.

My car has the smaller version bearing, but I had the outer seal removed at clutch change (40k miles). I am almost at 60k miles now, if it survives 80-90k miles, I will consider a Hartech rebuild then, as other parts in the engine will be worn also. If I decide to get a new car, I will just sell for whatever it is worth.
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13828
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Fri Sep 21, 2018 7:36 am    Post subject: Reply with quote

His bearing didn't fail. The IMS stud snapped. Bearing was fine.
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Poker2009
Imola


Joined: 09 Sep 2009
Posts: 843
Location: London


PostPosted: Fri Sep 21, 2018 7:37 am    Post subject: Reply with quote

come on - isn't that close enough to be classed as an IMS failure?!
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13828
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Fri Sep 21, 2018 7:45 am    Post subject: Reply with quote

Yes agreed, but the Op's concern is about bearings & bearing failures.

GMG's fault could've been down to an over torqued nut or mis-aligned cover plate. It would've been nice for GMG to give us a bit more information on what happened instead of ranting and taving at anyone who questioned the fault.
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