Originally Posted by xhifer

When did dealers start installing the new screwed on pipe design? I just bought a 2010 Turbo and records showed a coolant leak fix and thermostat housing replacement, but no other details. This was done early 2014.

Or does anyone know how the dealers were fixing them?

Originally Posted by sjg1138

FYI,

My 2011 S with 83K miles on it had a failure of the glue (Loctite 638/648) that holds an aluminum coolant pipe into the thermostat housing on the front of the engine. As a result I lost an unknown amount of coolant and the engine temperature rose. I would not be surprised if we start to see more of these failures as our cars age and the glue is exposed to more and more heat cycles.

The reason for this failure was the failing of the glue. Porsche had the exact same problem on GT2/3s and there was an NHTSA investigation. At the end of the investigation, Porsche convinced the NHTSA that there were no safety issues with this failure. The link below at the NHTSA will download a very interesting doc on this. One nugget in here is that 2011-2014 Cayennes and 2010-2014 Panameras used the same glue.

https://static.nhtsa.gov/odi/inv/201...009-57948P.pdf
https://www.nhtsa.gov/vehicle/2007/P...investigations

Porsche says that they introduced a glue application metering system to make sure the fittings received the correct amount of glue in 2008 implying that the failures were due to not enough glue being used. Obviously this is not the case.
Also Porsche mentions that there isnt a safety issue because in the GT2/3s the coolant comes out behind the rear wheels - this is obviously not the case for Cayennes and Panameras.

Anyway, if anyone here has had this failure, please post in this thread. If there is enough evidence that this is a big issue, maybe we can get the NHTSA to take a look. One idea would be to build a list of all the failures for all cars that have had this failure - across all Porsche models.

BTW, Porsche has a "fix" for this issue that uses threads instead of glue. Go figure. The cost is $1,800 to have a dealer implement the fix. Ask me how I know.

Originally Posted by cbracerx

Looks like it might be the rear fitting. If so, you're in luck - there is an easy way to repair this! I did it this fall - see the thread where this post is from. Note that my post describes a fast and simple way to make the repair https://www.6speedonline.com/forums/...ml#post4862550

EDIT: For those that don't click on the link here is my post: "I just did this repair on my 2011 S. Found that by lying under the car head toward the rear I could use my right hand through “the hole” and then easily see the repair area from an opening where the control arm attaches to the frame. Had the hood up and daylight shining in. Using that view I was able to clean the insert pipe “in situ” with a razor blade and battery terminal post wire bush (*this was a perfect fit). Final clean with brake solvent. Applied the Marine JB Weld adhesive and plugged the hose insert back into the fitting. Total repair time was less than an hour. Did not have remove hose clamps, My rubber hose was in perfect condition."