pvanosta

As evidenced in my other threads, I have had issues with my (Euro) CTT 2007, related to oil consumption, smoking under decel/accel, needing coils and plugs, then do it all over again.
I am the second owner of this '07 CTT with 123,000 KM (63,000 miles). Never lived in cold climate, dealer maintained.

Finally got the indy to scope cylinder 8 and sure enough, another one for the 'scored cylinder' list.
Expecting a quote by Friday on the 2 options:
- rebore and resleeve the cylinders and replace the pistons
- find a used replacement block

Any other ideas/suggestions, I am open to them.
Note: my profile says Daly City, CA, because I can't figure out how to reset it to a new country. I am based in the Netherlands now, near Amsterdam...

Andy E.

Does the '07 M.Y. have the 4.5 or the 4.8 fitted?

NelaK

Sorry to hear that. It really is kind of absurd that Porsche got away with selling such a flawed engine.

It scares me but it seems like almost every 955 and 957 will eventually suffer this fatal failure.

Depending on what the pricing works out to - I'd say try to get it repaired. A used or even new block will probably have the same issue eventually. At least from what I understand, repaired properly - they can adjust the clearances so it won't be an issue in the future.

Dilberto

ouch...

Tom M

Can't help with the scored cylinder but to change your location use the drop down on your login at the top of the page and select MY PROFILE. Once there select the About Me tab and then click the pencil icon on the Location line.

J'sWorld

Because you have such low miles I think it would be worth a rebuild. The original pistons are coated to run in the aluminum bore and they probably will not be re-usable anyway. By the time you have a set of pistons made, add up all the seals and gaskets and up all the "while your in there stuff", you will find it gets very expensive fast. Most importantly- make sure that a flanged type sleeve is used in the rebuild. Melling makes sleeves that will work for a nice price.

Petza914

If I ever face this issue in either my Cayenne or 997 engines, I will send the block to Charles at LN Engineering for their Nikasil reworking of the block. Their sleeves are also flanged as Jayme recommends, so no way for them to slide up in the bore and cause a D-chunk failure. I'd look into that option as part of the rebuild.

pvanosta

Thanks all.
To answer an earlier question: it is a 4.8 engine. Awaiting the quote(s) tomorrow...

Petza914

So the 4.8 with DFI was released in Europe the model year prior to the US release? The 4.8 wasn't offered over here until the 957 generation in 2008.

TomF

The 957 4.8 was released in Europe as a MY 2007... search is your friend.

Cheers,
Tom

Petza914

Rennlist is my better friend

pvanosta

Yes the 957 / 4.8 engine was released in Europe mid 2007.

pvanosta

Engine needs full rebore/resleeve, new pistons and new bearings.

12,000 $

ouchie

stefan063

Nope. In the beginning of 2007.

Jonathan H

To the OP, did they give a quote for the used replacement block?

To others, how long could owner theoretically expect to drive this vehicle as-is?