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Rennlist - Porsche Discussion Forums (https://rennlist.com/forums/)
-   Cayenne 958 - 2011-2018 (https://rennlist.com/forums/cayenne-958-2011-2018-242/)
-   -   Recommended maintence with intake manifold (https://rennlist.com/forums/cayenne-958-2011-2018/1128527-recommended-maintence-with-intake-manifold.html)

Slickdvl 02-10-2019 12:09 PM
Recommended maintence with intake manifold
 
Looking to do the e81 upgrade to my ‘12 CTT - primarily the intake manifold and diverter - however I figure that with everything off I may want to replace some things underneath. The car has 100k and I don’t know much about previous history on it - so assume it’s all original. Ive been looking at YouTube for DIY and here as well but don’t see anything specific to this other than fixing the leaking pipe. I’m thinking coolant pipe weld fix and thermostat should be on the list - anything else? Maybe the belts may be easier to access, starter?
Also looking for the oxygen sensors - anyone know or have pictures or DIY on that?

deilenberger 02-10-2019 02:34 PM
What exactly is the "e81 upgrade" ??

Slickdvl 02-10-2019 02:52 PM
https://www.6speedonline.com/forums/...rkit-pics.html

essentially it’s a partial conversion to a turbo s

deilenberger 02-10-2019 04:41 PM
Originally Posted by Slickdvl (Post 15629134)
https://www.6speedonline.com/forums/...rkit-pics.html

essentially it’s a partial conversion to a turbo s
That kit was for a 957 CTT right? Is the 957 intake any different than that fitted on the 958 turbo engine? Has anyone done this to a 958 CTT?

Interesting thread..

Slickdvl 02-10-2019 05:14 PM
There’s a guy that has done it on here, it will fit the 958

Slickdvl 02-11-2019 02:46 PM
Not a whole lot of diy’ers here?

deilenberger 02-11-2019 03:17 PM
Originally Posted by Slickdvl (Post 15631436)
Not a whole lot of diy’ers here?
Lot of DIY'ers - but not a lot of modifiers for performance. There are a few who have done some impressive things with the 955/957 series. Not so much on the 958.

Slickdvl 02-11-2019 03:52 PM
I’m asking for what to replace under the intake manifold from a preventative approach - not performance. Same goes for oxygen sensors. I may have to film this if I get a camera in time.

quickster2 02-11-2019 05:43 PM
If your fix of the coolant pipe is a new style bolted pipe and housing then I would recommend water pump, t-stat, and serpentine belt.

Slickdvl 02-11-2019 07:02 PM
I was planning to JBWeld, are you saying there are newer pipes that replace everything?

deilenberger 02-12-2019 12:08 AM
Originally Posted by Slickdvl (Post 15632094)
I was planning to JBWeld, are you saying there are newer pipes that replace everything?
The new thermostat housing (which has the two pipes coming out of it) was redesigned with pipes that bolt in. They are not coming out. If you look at the thread on the topic - there are photos. If you're replacing this - you'll R&R the water pump and the thermostat in order to replace the housing. To me putting the old ones back in would seem penny wise and pound foolish. Doing the labor twice when one of them fails really isn't that appealing. You also need all new seals for the thermostat, and it's not trivial to remove it from the housing in an undamaged condition.

Also curious - do you have an AllDataDIY subscription? If you're serious about DIY on a Cayenne you should. It will avoid having to ask questions like this - there will be step by step directions on this procedure.

deilenberger 02-12-2019 12:11 AM
Originally Posted by Slickdvl (Post 15631606)
I’m asking for what to replace under the intake manifold from a preventative approach - not performance. Same goes for oxygen sensors. I may have to film this if I get a camera in time.
The confusion comes about since you started out the thread with a performance modification. Sorry.. And cell phone pics work just fine for DIY's.

As far as how many serious DIY'ers there are here - have you looked at the Cayenne DIY subforum? That should answer that question for you.

Slickdvl 02-12-2019 10:20 AM
Yes I looked at the diy, not as much for 958’s as the 955/957’s; nothing at all on oxygen sensors. I’m considering all data but i sometimes find them hard to follow and the pictures are not always clear as to what you are looking at. Thanks for the info on the tsat and pump - I’ll have to look at what’s involved with all of this. Camera is more for everyone else - something I can post up and share on YouTube and then here
EDIT: useful
https://rennlist.com/forums/cayenne-...you-think.html
https://rennlist.com/forums/cayenne-...-firewall.html (note: diesel)
https://rennlist.com/forums/cayenne-...d-adaptor.html

Looks like ill sign up for alldataDIY - only 30 bucks for 1 car for 1 year

Joe Weinstein 02-12-2019 02:31 PM
Subscribed to thread. I would be interested in a 40hp gain, for sure.

CarGuyNVA 02-12-2019 04:23 PM
Originally Posted by deilenberger (Post 15629354)
That kit was for a 957 CTT right? Is the 957 intake any different than that fitted on the 958 turbo engine? Has anyone done this to a 958 CTT?

Interesting thread..
As I understand it, there's an E81 'powerkit' available for the 957 Turbo V8 and one for the 958 Turbo V8 that includes H/W and S/W (tuning) specific to each gen. It's most of the engine enhancements that are done to the Turbo S models, although the factory power rating on the E81 Turbo motor and the Turbo S motor for a given gen are not exactly the same (Turbo S a little higher IIRC). This powerkit was available as a factory option or added after the fact, available through Porsche's Tequipment program. The E81 powerkit includes the larger front brakes of the Turbo S model as well.

I'm not certain but I believe Porsche might have discontinued the 957 and 958 E81 kits already, although they might still be located as NOS somewhere.


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