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mcbit500 last won the day on January 28

mcbit500 had the most liked content!

About mcbit500

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  • From
    Abu Dhabi
  • Porsche Club
  • Present cars
    04 996 turbo
    09 Cayenne turbo
  • Future cars
    996 TurboS
  • Former cars
    03 Carrera 4s
    09 Cayenne GTS
    05 Cayenne turbo
    72 Triumph Stag

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  1. My rear deck fan will start up, not immediately but, up to about 15-20 mins after shutting the engine down and may run for 5 -10 mins. I'm in very high ambient temperatures though.
  2. Is the car a 2006 CttS? There was no 2008 turbo S and the standard tyres on the 2009 turbo S were 295/35-21. From the choices above, I'd probably opt for the Pirellis, as I tyre I prefer the Michelin Latitude Sports, but I don't believe that they are available in your size.
  3. I wasn't questioning your methodology, I was merely stating that I would not base a diagnosis on a single reading which is why i have 100% confidence in the results I received. Fact is that during the test, hot engine at idle, the readings were consistently 13.6V and 12.3V and the alternator will maintain a constant voltage for minutes at a time. This a simple test from an easily accessible point which has three fundamental outcomes which can immediately point to the area which needs further investigation.
  4. There is more than one way to skin a cat. :) I would never advocate basing a diagnosis on a single reading; you can repeat the same test about 5 times in a minute and if the values measured are consistent then the test is reliable. The results from the OPs test on the jump terminal, tell him that the earth is OK and that the voltage is either low at the alternator or that the voltage drop is in the cable between the alternator and the jump terminal.
  5. Mine did this and it was a very easily and cheaply fixed selector issue.
  6. It would appear that 158 51 is the US version and 158 31 was fitted to European/ ROW cars from 2005 onwards. I don't what the physical differences are but lighting is one of the areas where US cars often differ from ROW. US PET 955 631 158 51 headlamp /R 1 I8JD I8JD Main headlights with gas-discharge lamps U.S. version, XENON RHD European Pet 955 631 158 31 headlamp /R 05- 1 I8BC I8BC Main headlights with gas-discharge lamps + direction indicators, XENON, right-hand traffic
  7. Before my engine was rebuilt I had the low voltage issue, so while the engine was out I had the voltage regulator and earth strap as a preemptive attempt at a cheap cure. When the engine went back in I still had the issue, so one after another every HD cable in the starter / charging circuit was changed including the front to rear ones; no result, voltage was still low. Completely frustrated I decided to take a look myself. Taking the easy route first, with the engine hot and on load I measured the voltage across the battery directly and then from the +ve terminal to the chassis, both were exactly the same. Moving to the engine bay I measured from the +ve jumper terminal to the engine (13.6V) and then from the jumper terminal to chassis (12.3V) and concluded that the earth strap was faulty. Took the car back to the shop and demonstrated my findings and they said that they had actually checked the earth connections and found that the connections were good. They agreed to test the car using the earth strap from another car in the shop which worked just fine; the shiny new Porsche original earth strap on my car was faulty. A temporary fix was made using a (not very well made up) earth strap from a local electrical shop; I ordered a heavier duty, marine quality, ground strap online and this is what is now fitted to the car. As Ahsai says above, just because it is new or looks OK, don't ignore it when checking.
  8. Good to hear that, I hope you're now enjoying the turbo!
  9. Did you also solve the oil pressure issue?
  10. This, along with the short inner harness, has been an issue on all of the Cayennes I have seen here in the middle east.
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