Help identifying coolant pipes

Hi all, Pretty much as the title says. Came out from the pub last night and noticed a stream of coolant from under the car. Checked and the car had lost about 1.5 litres of coolant. So topped it up with bottles of water, drove home and put a tray under the car. Removed the rear most under Tray and found the leak to be come from a connection were a rubber pipe is clamped onto a small metal pipe. I've included pictures below. Just wondering if anyone could help me identify the pipes I need to change and offer any advise? Thanks, Lewis

The aluminium pipes sometime corrode and the corrosion swells the rubber pipe, they can then leak between both, not sure if this is your problem or if the rubber pipe has split but I think you may find the part number of that pipe printed on it at the engine end. When fitting a new pipe make sure the aluminium pipe is cleaned up to stop the same thing happening.

Managed to squeeze a bit further under the car and dry things off for a better look. Tiny pin hole in the Aluminium pipe right where it meets the rubber part. Can't find any parts numbers on the pipe. Runs from near the gearbox up the drivers side of the car to the front.

Have you downloaded the Porsche parts catalogue? That will help you identify the part number. Download it here: https://www.porsche.com/uk/accessoriesandservice/classic/genuineparts/originalpartscatalogue/

Thank you for your help. Suspect the rubber section to be number 42 on that diagram, now to find where the Aluminium pipe is located.

That pipe runs front to rear and I expect it to be an expensive part. I would be tempted to remove it and have someone ally weld the pinhole unless you can find a garage that'll drain the coolant and weld it for you.

Managed to squeeze a bit further under the car and dry things off for a better look. Tiny pin hole in the Aluminium pipe right where it meets the rubber part. Can't find any parts numbers on the pipe. Runs from near the gearbox up the drivers side of the car to the front.

No. 42 goes onto the front to rear pipes so No.40 ? Or do you mean the pipes that 42 go onto around the gearbox ? From your picture it seems like the front to rear ones though. yellow arrow on the image . Pretty big job to change them .. there is a cheating alternative if you have enough rubber pipe ... .. cut the ally pipe at the pin prick hole and fit the rubber pipe back on. Or you could cut it further back and with another rubber pipe make up a joiner piece .. not ideal but it would do for now . Edit .. actually thats the wrong end .. looking into it atm .. Ok try this link .. i think these are the pipes you need.. https://www.deroure.com/diagrams.asp?TBL=2687&MAK=3&MDL=25&SMA=0&SMO=0&ST=&SC=0

Thanks for the link, I've been looking for that!

Hi Demort, Thank you for the reply. Never thought about that actually. May be able to push the rubber pipe about an inch further up the metal pipe. Will give it a try tomorrow and see how I get on. I've circled the area on that picture so you've got an idea where the leak is. Thanks, Lewis

Yep .. ok look at the link on my post Edit .. those are the pipes i think you need .. they goto the heater so the battery basically. Big job to replace .. fuel tank i think will have to come out . Trust me .. trying to get the correct pipes from a Porsche list is a nightmare !! Youll need a bucket to catch the coolant and a jubilee clip .. dont reuse the clamp band type .

Just looked at the link, yeah that looks like the every boy. Thanks. Wow think that will be a big job as youve said. Probably best to try other alternatives to replacing it first! Lewis

You could try a breakers. These are the kind of parts that never sell. If its the same part on a 997, ask for the 997 part as it will be much newer. But yeah looks faff to replace.

What a great link! It gives the cost for virtually any Porsche part. :worship: