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Half assed plug replacement

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Old Sep 8, 2022 | 08:45 PM
  #16  
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From: linker Fahrbahn
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What are the torque values for the engine support arm bolts? And for the ignition coil screws?
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Old Sep 8, 2022 | 09:12 PM
  #17  
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Several sources all state 10 Nm (7.5 ft/lbs) for the coil screws on several other Porsche engines.
https://www.youcanic.com/vehicle/por...il-replacement
https://www.planet-9.com/threads/coi...e-spec.110926/
http://forums.pelicanparts.com/boxst...il-screws.html

For the dog-bone bolts, this might help. From this thread:
https://rennlist.com/forums/cayenne-...que-specs.html

Originally Posted by Schnave
Sorry, couldn’t find spec for current generation. Here’s something for the Torque Strut fasteners on previous Gen Cayenne V8.
NOTE: Porsche recommends replacing the nut each time (one time use).

When installing the new torque support, attach it to the engine first. This will allow you some play when attaching the other end to the bracket on the body. Keep in mind that Porsche also recommends replacing the nut securing the torque support in place. Once both sides are in place, torque the fasteners to 60 Nm (44 ft/lbs.).

https://www.pelicanparts.com/techart...eplacement.htm
https://www.hotcars.com/porsche-caye...-engine-mount/

Last edited by Schnave; Sep 8, 2022 at 09:26 PM.
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Old Sep 8, 2022 | 09:33 PM
  #18  
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From: linker Fahrbahn
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Thanks. MB coil screws are 8Nm and spark plugs are 23Nm. 30Nm seems high.

Does Porsche make a fuss about spark plug indexing the way MB does? MB put out a technical paper talking about the risk of valve edge erosion if the spark plug electrode is not properly oriented. Orientation is achieved by buying OEM plugs from the dealer, torqued to MB specs.

Guys on the MB site wrap themselves around the axle on this, marking spark plugs and sorting through and sanding copper washers until they think the electrode is perfectly aligned.
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Old Sep 8, 2022 | 09:55 PM
  #19  
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Originally Posted by dgjks6
The plugs are 17 ft/lb.
17 ft/lbs converts to 23 Nm.

Also check out this thread. You will need a thin-wall socket to access the plugs.
https://rennlist.com/forums/cayenne-...ug-change.html

EDIT: Never-mind; I see you also posted on that thread!

Last edited by Schnave; Sep 8, 2022 at 10:02 PM.
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Old Sep 9, 2022 | 12:44 AM
  #20  
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From: linker Fahrbahn
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Whoops the unit conversion got me, thanks. For inquiring minds, BMW coil screws are 7Nm and spark plugs are 23Nm.
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Old Sep 10, 2022 | 09:43 AM
  #21  
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or do what I did ... when my water pump , t-stat , and temp sensors failed under warranty ... said to the service manager while it was there for 3+ weeks and he called and said they finally have all the parts .. I said to him " so while the engine is torn down , air cleaner, bumper, frontend is off... go a head and do the spark plugs, I'll pay for the parts only " ... he was hesitant ... I said " Porsche f'd me with parts delays, middle of a trip... I don't want ot hear excuses. 2 birds 1 stone " ... he called porsche and got the plugs completely covered by them
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Old Sep 19, 2023 | 09:31 AM
  #22  
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Would not have been able to do this on my 2020 Base without breaking at least a couple of things without this forum/thread.
2 hours start to finish with nothing broke! Thank you to all the contributors here. If anyone in NE Ohio and needs help I am happy to now pass on my knowledge
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Old May 11, 2024 | 05:55 PM
  #23  
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Changed my plugs today using the instructions above, THANKS @dgjks6 and others. Took about 2 hours, not too difficult, but hard to work around the wiring harnesses, remove the engine brace, pulling coils out, etc.

I noticed a hose connector underneath the air filter (near the oil filler) with no hose attached. However, looks identical to the picture post by @dgjks6 , see red arrow in pic below? What is this, and can someone confirm there isn't supposed to be a hose attached? Am I missing something obvious?



Thanks

Lee
2019 Cayenne Base
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Old May 11, 2024 | 06:21 PM
  #24  
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Originally Posted by lee.jones
I noticed a hose connector underneath the air filter (near the oil filler) with no hose attached. However, looks identical to the picture post by @dgjks6 , see red arrow in pic below? What is this, and can someone confirm there isn't supposed to be a hose attached? Am I missing something obvious?
No worries. From this thread:
https://rennlist.com/forums/cayenne-...sing-hose.html

In Audi installations, these fittings are for the Activated Charcoal Filter (ACF) purge line. The ACF absorbs fuel vapors when the engine is off. It is purged during engine operation by venting those vapors into the intake system. In this case, the vapors are vented into the fitting on the air / oil separator.

Reference: Pages 21-23 of Audi EA 389 Self Study Program, attached below.






However, in each photo I could find online, the Cayenne configuration does not use this hose. Presumably, Porsche uses a different hose connection to purge the ACF canister. I’ll save that research for another day.

Photo posted by @95_993 here: https://rennlist.com/forums/cayenne-...-change-3.html



​​​​​​​
​​​​​​​Screen grab from @PorscheACC video in same thread:

[/

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Attached Files
File Type: pdf
V6 Study Guide.pdf (11.53 MB, 171 views)
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Old May 11, 2024 | 09:46 PM
  #25  
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From: linker Fahrbahn
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On the V6, fuel tank vapor ventilation (purge) is done via small diameter tubes with check valves. There is a no-boost tubing circuit and boost circuit. One circuit enters the induction system at the turbo(s). I don't recall the entry point of the other circuit.

The purge line enters the engine bay from the right rear and is routed fore-aft along the right cam cover, then across the engine to the turbo(s) and intake ducts. The line is protected in a foil fabric heat shield near the high pressure fuel pump.
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