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I recently bought a Cayenne S 4.8 from 2008. After a month the HPFP went down so I repaired that (900 euro), no problem if it is just a standalone incident but it seems to be very common for the 4.8 engines. Mine was already replaced with the former owner in 2010 and 2011.
My engine was replaced in 2010 by Porsche and now this engine has around 100k kms (so the second HPFP failed just after a couple of thousand miles). This made me thinking about the build quality of the Porsche engines. The HPFP is not Porsche made I guess (Continental is written on it) but if "I would be" Porsche, I would look for another manufacturer for these parts. So I already got the impression that they are not as typically German as I thought. Then I got in touch with other Cayenne owners over the internet/facebook etc. And the first 10 owners (with a 4.8 engine) warned me for cylinder scoring because they all had their engine replaced or sold their car because of this problem. I knew the 4.5 had this problem but I remember calling a Porsche dealer a couple of months ago to ask if the 4.8 was better build and they said it didn't have any issues like the 4.5 had with the cylinder walls. So I checked again why my car had a new engine and indeed, also mine had scored cylinder walls at the time.
Some people say it happens because of starting the car in freezing conditions but in Belgium, it doesn't get that cold like in Alaska or Scandinavia. I suspect just a bad build engine or the wrong use of materials for the cylinder walls.
It would be nice to know how common this is on the 4.8. I am very interested in how a car works and why an engine can fail so I would like to know who has or had an Cayenne 4.8 (S, GTS or Turbo) and if you ever encountered this problem.
Hi, I'd like to ask a question that has been asked, discussed, youtube videoed etc... My apologies, but I've read most of them and haven't found anything similar. I'm looking at a 2004-2006 Cayenne Turbo that I don't want to turn into an engine money pit. I've listened to 8, all cold and most have a very slight knock on the drivers side of the engine. I'm wondering if this is the beginning to the end or some explainable sound. You can only hear it once it drops to a low idle. I went to my local dealer in Denver and they stated they have no way to diagnose, would not perform a new car inspection, but would do a compression check. I realize this is tough to know when the dreaded engine knock may come due to extreme cold, piston expansion, etc...etc... I'm also aware that the turbos were less prone. If I'm going to drop a new engine into an old cayenne, I'd rather do it on a $10k one than $18k which is the present range for a 2004-2005 in CO. Thanks for anyone's help and as a newbie, I hope to purchase a Cayenne and give back via DIY but don't really want to deal with engine issues for 200k+. Thanks again, Frank
Just found some instructions for changing spark plugs without having to remove the rear bumper/license plate light, and intercoolers.
The process is more or less - remove rear wheels, and then remove various heat shields - does this seem viable?
Here is the link I found: http://bd8ba3c866c8cbc330ab-7b26c6f3e01bf511d4da3315c66902d6.r6.cf1.rackcdn.com/Porsche996TMajorMaintenanceupdate.pdf
Using this method will save a bunch of time
let me know,
I am bit confused because 2 different Porsche Indys had different suggestions to the problem.
My car, when cold after sitting 5-6 days when I get in and start it, it starts flawlessly. After driving for about 5-10 minutes to get to the grocery or gas station the car needs 2-3 turns of the key to start. Sometimes it starts with 1st turn (very rare when hot).
Battery 6 months old, although it doesn't seem as a power problem. When the car was in for a PDCC line leak, I mentioned the problem to the mechanic who noticed it and told me next time we should clean the starter (don't know what that means). He asked 250 Euros for cleaning! wtf!!!!!!!
I was passing by another reputable Indy which is 70km far from where I leave, stopped and mentioned the problem to get a second opinion and from what he felt, he told me close an appointment cause it might be something fuel related.
P.S No boost leak, constant idle rpm, no reduced power or so, car runs great but I am bit concerned about the start issue in fear of getting stuck during a trip.
Car has 125k miles, fully serviced in July 2015 (spark plugs, oil, belt, filters,etc)
Just purchased a 2008 CTTS and the previous owner is running a staggered set up Front:275/40/20 Rear:315/35/20. The current tyres Goodyear Wrangler F1 need replacement and I would appreciate some suggestions from the members here.
-The 1st and expensive choice: P-Zeros at 1250 Euros
-Continental Contisport SUV: at around the same price
-And a guy at a local store suggested Atturos AZ850 which are at around 630 Euros.
What do you guys think? Any other suggestions??
Thanks in advance