bigbuzuki

Forgot to mention the fuel pumps.

They will fail and changing them both will give you another 75,000 miles if not more.

Water pump, thermostat, air suspension compressor piston ring, if your keen.

These will greatly reduce the chance of you being stranded.

The one thing that would complement your preemptive maintenance philosophy and will provide maximum longevity is to change all your fluids. Definitely worth it as the extended life you will have far exceeds the cost of the fluids. Don't get caught up in the alternative fluid mantra, use the Porsche approved fluids and all will be good.

Some of these fluids are lifetime fluids or 150,000 miles, change them at half life and enjoy the benefits.

The scenario I described typically happens after the coolant pipes burst, it may not be in your circumstance.

If the transmission fluid leak is coming from a hole at the bottom of the transmission bell housing it probable is your front seal.

Transmission leaks usually happen after a coolant leak from the pipes.

The coolant finds it's way to the input shaft of the tranny and dries into a hard abrasive residue which wears the front seal.

The transmission has to be removed to replace the seal for the repair.

Did you change the coolant pipes before or after they leaked?

Hahnmgh63, I am not sure if there is a Torsen setup inside the transfer case. Here is an excerpt from the Porsche Service Information Technik manual regarding transfer case operation.

Using sensors, the active electronic system continuously measures traction at the wheels, as well as vehicle speed, lateral acceleration, steering angle and operation of the accelerator pedal. From this, the system automatically calculates the optimal degree of locking for the differentials at the drive axles. In this way, more power is applied at the front or rear wheels, depending on the driving situation. If, for example, a difference in speed is detected between front and rear axles through the wheel speed sensors (both in High Range and in Low Range), the electric motor (8) is activated and the curved disk is rotated. The disk presses on the lever (10) with a cam and the lever compresses the clutch disc pack (15). Engine torque is now transmitted to the axle which can transmit torque.

Check your fuses that supply power to the transfer case control unit and servo motor.

Some variants also have a servo motor on the rear differential. Check.

Although you don't use low range, the servo motor is always active even in normal range.

The servo motor drives a cam assembly inside the transfer case, which controls the torque split between the front and rear differentials via friction disc assembly.

Get it fixed promptly, as more serious transfer drive issues can result as the cam will not be in its optimum position, which can lead to premature failure of your friction discs inside the transfer case.

Check fuses F1, F2, F10 in the motor compartment fuse box.

The smaller fan always comes on when you turn on the air conditioner.

Try this first.

She looks good and no doubt she performs well.

With her panorama roof and alternator now fixed, you are ready to enjoy the European summer.

What was your outside temp?

How high did your temp needle go?

As mentioned previously, If the noise stops when your stationary it's sure looking like the cardan shaft bearing failing.

The mirror adjust switch feeds into a door control unit which is located behind the door panel.

Sounds like the control unit may be faulty or someone has previously played with the wiring inside.

Does the passenger mirror behave properly when moving the switch?

Around 14 mpg.

Wrinkled....I can't find where the washer and HVAC recirc mode correlation is listed or described in the operation manual.

Does the recirc light come on for the period the washer is activated?

Maybe the Porsche boys used the old regulator in the new alternator to save some money.

Try this for compressor fix.

http://www.ebay.com.au/itm/Porsche-Cayenne-2002-2010-WABCO-AIR-SUSPENSION-COMPRESSOR-PISTON-RING-REPAIR-FIX-/321370811251?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Model%3ACayenne&hash=item4ad3316b73&_uhb=1

That's the same documentation error on my 2003 turbo as well.

Although they both say left, treat the first section as the Left fuse panel, and the second section as the Right fuse panel.

I'm with JFP on this, there is a requirement to check for any high resistance on the transmission cables from the battery to the alternator.

Check the connections and grounds of the applicable cables.

Disconnect them and ensure they are making good electrical connection. Any intermittant bad connection will drop your voltage in the system.

I have attached a schematic so you can see what cables to check.

Don't feel bad about changing out the starter and alternator, they will provide you with another decade of service.

The vehicle is worth fixing, and won't be long now.

Hi bigbuzuki, do you have the wiring diagram for a Turbo with only a single battery? Thomas said he only had one battery under the driver's seat but no battery in the trunk, where he has the Bose.

I don't have a specific one for single battery.

There is enough detail there for one to work out what cables go where.

I'm with JFP on this, there is a requirement to check for any high resistance on the transmission cables from the battery to the alternator.

Check the connections and grounds of the applicable cables.

Disconnect them and ensure they are making good electrical connection. Any intermittant bad connection will drop your voltage in the system.

I have attached a schematic so you can see what cables to check.

Don't feel bad about changing out the starter and alternator, they will provide you with another decade of service.

The vehicle is worth fixing, and won't be long now.

Grounds and Power.pdf

I change the tensioner every second belt change. No official requirement, just another preventative measure which serves me well.

Ah, the infamous Cowboy belt buckles.

Porsche Recall A506.

Manufacturer: PORSCHE CARS NORTH AMERICA, INC.

SUMMARY:

CERTAIN PASSENGER CARS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 208, "OCCUPANT CRASH PROTECTION." ALL THREE REAR SEAT POSITIONS AND THE FRONT PASSENGER POSITION ARE EQUIPPED WITH SEAT BELT RETRACTORS THAT HAVE A LOCKING FEATURE WHICH CONVERTS THE RETRACTOR FROM AN EMERGENCY LOCKING RETRACTOR (ELR) MODE TO AN AUTOMATIC LOCKING RETRACTOR (ALR) MODE FOR THE PURPOSES OF CHILD RESTRAINT INSTALLATION. THE BELT MAY DEACTIVATE THE ALR MODE WITH CERTAIN CHILD RESTRAINTS.

CONSEQUENCE:

WHEN INVOLVED IN A CRASH, THE CHILD RESTRAINTS MAY NOT BE PROPERLY SECURED INCREASING THE RISK OF INJURY OR DEATH TO THE SEAT OCCUPANT.

REMEDY:

DEALERS WILL PERMANENTLY INSTALL A CLIP IN EITHER OF THE AFFECTED REAR OUTBOARD SEAT BELTS AND PROVIDE AN OWNER'S MANUAL INSERT. THE CLIPS WILL PREVENT UNWARRANTED CONVERSION FROM ALR TO ELR MODE WITH CHILD SEAT INSTALLATION. THE RECALL BEGAN MAY 17, 2005. OWNERS SHOULD CONTACT PORSCHE AT 1-800-545-8039.

NOTES:

PORSCHE RECALL NO. A506. CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-888-DASH-2-DOT (1-888-327-4236).

http://forums.rennlist.com/rennforums/porsche-cayenne-forum/412155-cowboy-belt-buckles-a506.html

If it's only the licensing fee that hasn't been paid, your argument stands.

What we don't know is if that is the case.

Either way do what you wish. .. I've provided chemical comparisons to the best of my knowledge. ...all far as I can see everyone else just provides their two cents.

Unless someone can prove differently. ...I see no reason not to use type 4.....

There are heaps of owners out there who have hundreds of thousands of miles on their Cayennes who are using the recommended fluids. I'm one of them. They all can't be wrong. Change the oil / fluids sooner than later and all will be fine.

If a consumer had an engine or other mechanical failure, the car was still under warranty, and found to be using an oil / fluid that claimed was meeting specification but was not on the approval list. Why would you give Porsche a reason not to honour the warranty?