So the other day noticed a huge amount of white smoke when starting the car cold, and a very high idle (1500rpm) when in neutral or park.
Monday, 22 November 2021
2004 cayenne turbo white smoke - not AOS but broken crankcase breather hose DIY repair
Read codes and got this
P2187 P2189 and P0507 - some google-fu says it's most likely a torn AOS diaphragm, located under the black cap here. Also checked oil level - was very very low!
Apparently Porsche won't sell you the 50c diaphragm, wanting to sell you the entire valve cover instead for a kidney and liver.
Anyway, I removed the plastic cover and found a very obviously broken crankcase breather hose, which has a connection to the AOS as well. Broken hose = no vacuum = defective AOS operation.
Also removed the AOS cap after a great deal of swearing, and found the diaphragm was sound - removed it from the cap and checked it inside and out.
Anyway, found a seller on Aliexpress who would send me a new cap, diaphragm, plastic mount and spring for just USD $30 delivered - bargain! And only took 2 weeks to Melbourne.
To repair the broken crankcase breather hose, I'm not going to spend $100s on another thin plastic hose that'll break - instead, I removed the piping from the end connectors, grabbed some 16mm PEX pipe from Bunnings and used a little bit of gasket maker to seal the ends - this will never break.
Replaced the AOS with the Aliexpress one, replaced the crankcase hose and engine cover. All is good - no white smoke, plenty of power, and we're back in action again for about $50!
So the other day noticed a huge amount of white smoke when starting the car cold, and a very high idle (1500rpm) when in neutral or park. R...
Porsche 911 996 fix low battery charging voltage problem - replacing starter-alternator Y cable, changing drive beltSo another annoyance I had was that my 911 would charge the battery at 14V when I initially started the car, then as it warmed up (after abo...
Porsche 911 (996 and 997) convertible cabriolet roof fix. Not opening or closing due to hydraulic fluid leak repairs DIY fixDuring 2019, the roof in the 911 was getting slower to open and close. Checking the hydraulic fluid reservoir, it was slowly dropping indic...
Love the sound of my cayenne turbo - but it's a pity you can only hear that V8 burble when you're right at the exhaust. Many peopl...