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Must admit I had my fingers crossed!

Peter_Bull

Peter_Bull

PCGB Admin
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I am pleased to say that the Cayenne passed it MOT with absolutely o advisories!!

It a long time since I had a car this old and it has always been my worry that it may need expensive work to get through. I needn't have worried at all. Phew!!

Last year, not long after I purchased it, I put on a set of Continentals all round but the rear ones lasted only 7.5 k miles. A couple on months ago I decided to replace them with Pirelli's all round this time to see how they might last. I managed to sell the two front Continentals with 4-5mm tread for £100 so that helped offset the cost of the Pirelli's.

Before I got the Cayenne there was an advisory that the rear sub frame had slight corrosion. I had a look and it really wasn't too bad, but I wire brushed it off the best I could and treated it with FERRO-BET Rust Remover Converter. Certainly changed the look from rust to converted grey that's for sure. Then I applied Lanoguard Underbody Rust Protection which seems to help protect all the whole underside and remove any need for the said advisories in the future :)

I must say that I am so impressed with the diesel Cayenne that I feel its a real pity that they no longer make them. I was offered a 2.5 year old petrol Macan at a very reduced price from a relative, but I declined with thanks, as I love my Cayenne too much to part with it just yet.
 
Congratulations Peter,

Many more months of happy motoring then.

I must say the diesel Macan we purchased back in 2014 and ran for 6 years was a superb and I would certainly have ordered another had it been available.

Interestingly Audi continues to offer diesel power in its latest sister car range, the Q5, being launched soon.

Regards,


Clive
 
Pleased to report that our 2014 model year Cayenne Diesel (aka Elsie) also passed her MOT this week, albeit with one advisory for tyre sidewall damage. Elsie was wearing a set of 19 inch Pirelli Scorpion Porsche “N0“ rated all-season tyres when purchased a year ago. These have worn very evenly and took us safely around Europe on last September’s PCGB 75th Anniversary factory tour, including back to her Leipzig birthplace.

Elsie is factory fitted with the Porsche tyre pressure monitoring system (TPMS) which seems to work well. Does anyone know if the special valves on this system need servicing when new tyres are fitted? I’ve noticed that the big tyre retailers are now advertising TPMS servicing as an option. Are these TPMS valves generically manufactured, or do the ones fitted to Porsche Cayennes need anything more Porsche specific by way of maintenance?

Regards

David
 

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Hi David, the biggest reason for valve replacement on TPMS alloy valves is owners fit groovy metal dust caps then don’t bother to check their tyre pressure because in a modern world, they just wait until the car tells them they have an issue. Consequently when they do get round to trying to remove the valve caps they more often than not find the two metals, alloy valve and dust cap have corroded to the point you can no longer remove the cap without damaging the end of the valve or when going to get tyres fitted the technician can no longer get the little Schrader valve out of the stem to let the tyres down, if they show no signs of this and the valve is in good condition there is actually no reason to change the clamp in valve.

The good news is most but not all TPMS systems, depending on specific types have the option to remove the valve from the main sensor and refit a new valve or if an alloy one fit a new seal kit at a relevantly low cost and refit the electronic part. If this too has failed due to age as they only have a small camera battery inside them, again that too is easily replaced. In case you are wondering the average life span of a spurious replacement sensor is somewhere around five years due to quality of the sealed internal battery although the original ones do seem to last somewhat longer at around ten years in most cases but are hugely more expensive, hope this answers your question.

Also great to read that Elsie has a clean bill of health. :)
 
greg_harm said:
Hi David, the biggest reason for valve replacement on TPMS alloy valves is owners fit groovy metal dust caps then don’t bother to check their tyre pressure because in a modern world, they just wait until the car tells them they have an issue. Consequently when they do get round to trying to remove the valve caps they more often than not find the two metals, alloy valve and dust cap have corroded to the point you can no longer remove the cap without damaging the end of the valve or when going to get tyres fitted the technician can no longer get the little Schrader valve out of the stem to let the tyres down, if they show no signs of this and the valve is in good condition there is actually no reason to change the clamp in valve.

The good news is most but not all TPMS systems, depending on specific types have the option to remove the valve from the main sensor and refit a new valve or if an alloy one fit a new seal kit at a relevantly low cost and refit the electronic part. If this too has failed due to age as they only have a small camera battery inside them, again that too is easily replaced. In case you are wondering the average life span of a spurious replacement sensor is somewhere around five years due to quality of the sealed internal battery although the original ones do seem to last somewhat longer at around ten years in most cases but are hugely more expensive, hope this answers your question.

Also great to read that Elsie has a clean bill of health. :)
Click to expand...

greg_harm said:
Hi David, the biggest reason for valve replacement on TPMS alloy valves is owners fit groovy metal dust caps then don’t bother to check their tyre pressure because in a modern world, they just wait until the car tells them they have an issue. Consequently when they do get round to trying to remove the valve caps they more often than not find the two metals, alloy valve and dust cap have corroded to the point you can no longer remove the cap without damaging the end of the valve or when going to get tyres fitted the technician can no longer get the little Schrader valve out of the stem to let the tyres down, if they show no signs of this and the valve is in good condition there is actually no reason to change the clamp in valve.

The good news is most but not all TPMS systems, depending on specific types have the option to remove the valve from the main sensor and refit a new valve or if an alloy one fit a new seal kit at a relevantly low cost and refit the electronic part. If this too has failed due to age as they only have a small camera battery inside them, again that too is easily replaced. In case you are wondering the average life span of a spurious replacement sensor is somewhere around five years due to quality of the sealed internal battery although the original ones do seem to last somewhat longer at around ten years in most cases but are hugely more expensive, hope this answers your question.

Also great to read that Elsie has a clean bill of health. :)
Click to expand...
Greg, Thank you for your detailed info re TPMS. no issues at all with mine so far, and pleased to say they have standard plastic valve caps on
 
Greg, Thank you for your detailed info re TPMS.

Pleased to report, no issues at all with mine so far, and also pleased to say they have standard plastic valve caps.

Conscious that our car is now over 10 years old though, so thank you for advancing my understanding of this topic.

Kind regards

David
 
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