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Flywheel damaged by CPS?

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Old 07-10-2018 | 03:15 PM
  #16  
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Originally Posted by 4W4K3
Nope, manual transmission. Same engine in all pics.

And yeah, that's my hope as well. I've got a scope on order. Fingers crossed this was something simple.
Looks like it has the tiptronic adaptor ring on it (part #14 here).
I also spotted some vacuum connectors that are only for tiptronic cars.
Old 07-10-2018 | 03:47 PM
  #17  
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Originally Posted by Ahsai
Is that engine in the photo from a tiptronic car?
Pretty sure you are right that the first picture in post #11 is a tiptronic.
Old 07-10-2018 | 04:18 PM
  #18  
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Originally Posted by cds72911
Pretty sure you are right that the first picture in post #11 is a tiptronic.
Yeah that's what I thought too. Just found it odd that the OP has a manual trans.
Old 07-10-2018 | 05:09 PM
  #19  
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Could the dual mass flywheel have been on its last legs and the jolt finished it off ?? I believe there is a rubber bush integral to its internal workings , if this has failed throwing the sensor ring out of true it could hit the sensor and I bet has done again I'd pull the new one and inspect for damage also !!
Old 07-10-2018 | 05:57 PM
  #20  
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Could a clutch cover bolt come loose, then get jammed between the flywheel edge and the casing, going past the CPS and mashing it?

You can buy USB boroscope cameras on Amazon real cheap, I'd start there and see what you can find by scoping it.
Old 07-11-2018 | 03:28 PM
  #21  
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Thanks for all the feedback, everyone. Truly appreciate all of your insight.

My first order of business will be to get a borescope in there to see if I can get a better idea what I'm looking at. Hopefully I find a smoking gun.

After that, I will drop the transmission and open up the bellhousing to inspect the flywheel further. I am expecting to find missing/bent teeth. I've been reading up more on the construction of the DMF and it seems plausible that it was a spring/bolt that separated and could have hopefully caused this movement which damaged the CPS. The transmission drop will be uncharted territory, but I found a few how-to's that don't seem too difficult to complete. Please let me know though if you have any recommendations or things to watch for in this process.

Last edited by 4W4K3; 07-12-2018 at 12:07 AM.
Old 07-11-2018 | 09:52 PM
  #22  
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The photo showing the rear of the engine shows the Torque convertor intermediate housing for a Tiptronic transmission , its for 2005 997/1 ( not earlier ) as Ahsai has mentioned , so that engine shown in the photo had up to that point in time had a " A 97;01 or a A 97: 31" Tiptronic ( Automatic ) transmission
Old 07-11-2018 | 09:59 PM
  #23  
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Originally Posted by JET951
The photo showing the rear of the engine shows the Torque convertor intermediate housing for a Tiptronic transmission , its for 2005 997/1 ( not earlier ) as Ahsai has mentioned , so that engine shown in the photo had up to that point in time had a " A 97;01 or a A 97: 31" Tiptronic ( Automatic ) transmission
Very strange indeed. The car had a replacement engine earlier in its life. Looks they must have adapted the tiptronic engine for this car's usage.
Old 07-12-2018 | 11:25 AM
  #24  
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The gap should be 0.0394”. (1mm +/- 0.2mm)
Old 07-12-2018 | 12:01 PM
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Just drop the trans and forget about scoping as it needs to come out one way or the other...Good luck and take pictures!
The trans drop is simple but a little time consuming, just take it slow and be careful.

Last edited by 808Bill; 07-13-2018 at 10:18 PM.
Old 07-12-2018 | 02:46 PM
  #26  
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Originally Posted by 808Bill
Just drop the trans and forget about scoping as it needs to come out one way or the other...Good luck and take pictures!
The trans drop is simple but a little time consuming, jsu take it slow and be careful.
Good idea. Might as well save some time on scoping. My 928 is currently occupying my garage bay but hopefully will be finished in about a week (timing belt, waterpump, cam gears, and everything else in that general vicinity), then I can start on this.

What do you guys think about the replacement DMF's? Is Luk the way to go?
Old 07-12-2018 | 06:27 PM
  #27  
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Luk is the only one that makes them as far as I know. If you buy one in a Sachs box it will have Luk stamped on it. Rockauto sells one labelled Brute Power or something like that, probably a Luk too.
Old 07-13-2018 | 12:01 AM
  #28  
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Originally Posted by 808Bill
Just drop the trans and forget about scoping as it needs to come out one way or the other...Good luck and take pictures!
The trans drop is simple but a little time consuming, jsu take it slow and be careful.
This. You have something banging around in there. You are very lucky the CPS is the only thing that has been damaged. I had the displeasure of seeing what can happen when something gets inside the bell housing and tries to work its way between the flywheel or clutch and the bell housing... things get very expensive. I would not drive this car another inch until this issue is resolved.



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