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Coolant leak found..not sure what to do.. pics

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Found the smell. Lot to be said for the pepto bismal coolant stalagmites. Followed the pepto trail drivers side. It's rubber down low then goes verticle on engine side of heat shield with multi bend metal lines. These lines run as a pair. Up high where it goes back to rubber from metal..it is leaking at a banjo clip and running down same metal line and dripping off where they go back to rubber. One line is leaking...not both. Can see it with an extended mirror from the bottom and the top but not great. Why would it leak here? Am I over pressured somewhere and this is the weak spot? The banjo clip seems to be where it is supposed to be. I can not see the hose that well but looks as though it is leaking rubber to metal unless there is a bad spot in rubber. Can't see it good enough to know. Newer to me cayenne. Had power steering line pop off at a metal rubber transition at a banjo clip when really cold this winter. Fixed it with a stainless hose clamp. This the same type of fix? Problem is how do I get at it? Also anyone know where these lines go to and come from?

Can't tell if these are the notorious T's...does not look like it but hard to tell in the mirror. Been searching for a coolant system diagram and can not find one.



'04 Cayenne turbo 92,000 miles




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The spring loaded hose clamps seem to be a weak point on Cayennes. Dunno why Porsche so loves them (easy to assemble? Cheap? Both?) Back when my P!G was smelling of coolant with no easy source spotted the dealer replaced most of the hoses and the clamps. Didn't fix anything because that's not where the leak was.

A screw clamp is a good replacement. Use a quality one. For sure Porsche didn't.

BTW - one of my power steering hoses to the power-steering cooler was dribbling at the rubber/metal junction. Same sort of crappola clamp. Added a second screw clamp. Leak gone. Sometimes two is better than 1, especially if you can locate the second one on the flare in the metal tubing (it's usually right upstream of the spring clamp.)

Edited by deilenberger
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Thanks for your insight. I was about to post that I got a much better look tonight from below with both pans off. There are trace coolant leaks at both Ts but the more major of the leaks is from the second (lower) T where its hose connects to steel line. leading down. Was going to ask...how do I fix this since its not really broken. I think I wil try to fashion the brass T replacements that fellow from Perth posted recently..then dig into it and put brass in it and replace every clamp I can get at back there with screw clamp...or simply add a screw clamp over the flare. At least I know I am not in for a catastrophic coolant failure on this unless one of those Ts implodes...I must say thay look good and fresh but looks can be unreliable.

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