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Errant Spark Plug Listings - Pretty Common Problem


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The 1st generation Cayenne Turbo models (i.e., Turbo, Turbo S) came from the factory equipped with single ground electrode spark plugs (Beru 14F-6DPUR021, Porsche part number 999 170 221 90), while the normally aspirated Cayenne S came equipped with four ground electrode spark plugs (Bosch FGR 6 KQE).

I was recently looking at a variety of websites for plugs equivalent to the original Beru plug and noted that many of them that have "vehicle parts finder tools" will display the incorrect four ground electrode plugs as the "correct" plug for the Turbo engines. The attached extract from a Porsche Cayenne training manual explains why the four ground electrode style plugs should NOT be used in the turbo engine. I tend to trust the Porsche engineers when it comes to stuff like this, since they could have spec'ed any spark plug they desired.

If you want to go with a Bosch plug in your turbo engine, use the FR6DPP332S plug; it's a single ground electrode plug and comes gapped (.8mm) correctly for the turbo engines. Otherwise, stick with the Beru 14 F-6 plugs. All in my opinion, of course.

Cayenne Turbo Spark Plugs.pdf

Edited by spooltime
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  • 4 years later...
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On 7/16/2013 at 3:13 PM, spooltime said:

The 1st generation Cayenne Turbo models (i.e., Turbo, Turbo S) came from the factory equipped with single ground electrode spark plugs (Beru 14F-6DPUR021, Porsche part number 999 170 221 90), while the normally aspirated Cayenne S came equipped with four ground electrode spark plugs (Bosch FGR 6 KQE).

I was recently looking at a variety of websites for plugs equivalent to the original Beru plug and noted that many of them that have "vehicle parts finder tools" will display the incorrect four ground electrode plugs as the "correct" plug for the Turbo engines. The attached extract from a Porsche Cayenne training manual explains why the four ground electrode style plugs should NOT be used in the turbo engine. I tend to trust the Porsche engineers when it comes to stuff like this, since they could have spec'ed any spark plug they desired.

If you want to go with a Bosch plug in your turbo engine, use the FR6DPP332S plug; it's a single ground electrode plug and comes gapped (.8mm) correctly for the turbo engines. Otherwise, stick with the Beru 14 F-6 plugs. All in my opinion, of course.

Cayenne Turbo Spark Plugs.pdf

 

Hi, great info.  Any way you can post the page listing the correct gap?  I've seen both 1.6mm and 0.8mm listed on different forums.  Emailed vendors and they also go back and forth between 0.8mm and 1.6mm.

 

Called Suncoast service dept.  Tech answered that they never gap plugs, they use right from the package.  He didn't know how much the gap from factory is (should be 0.8 mm).  I think Porsche specifies a lot of crap (maybe to justify service cost or maybe as a reflection of their German-ness), but a lot of the work, even at the dealer, is not done at a detailed level.  I recently had ATF service done and they only used 7qt instead of the 9qt in the manual.

 

 

1.6 mm

 

thanks

Edited by rchen404
added link, other info
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  • 2 weeks later...

I ran into trouble with this too - ended up using NGKs website and their recommended plugs. My CTT had 4 prong plugs in it from the PO. I switched back to single prong - didn't notice any difference although the 4 prong ones were def due for the swap when I got to them. 

 

I ordered a coil pack kit for my CTT and it came with the single prong plugs for the NA V8 and those were gapped to 1.6mm. I returned the plugs and then ordered the NGK recommended plugs for the turbo which came gapped to 0.8mm....Although their website doesn't reflect this difference.

 

ngk_5bf7eb47cb80ebc20db2aa91c490324dfb520e12.png

Edited by dpatel710
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