jhbrennan

What version cap do you have - I believe the most current part number on the cap ends with 04.

atcbi5

Had the same leak and I fixed it. It was one of the elbows. Well guess what, other ones started leaking. But to get those repaired, my engine has to come out. This is occurring on many of these cars right now. I will be dropping my engine around September. It will happen to all of you so be prepared. I was thinking of using the sharwerks metal elbows. It is not your cap trust me, it's the elbows and hoses that attach to them. I have a Cen-tech video camera and took video of the leaking parts. You can see the coolant pudding on the top of engine. It stays atop until it spills over. That's when you notice the leak. If you want to know if you have this problem, do this test. After you drive for 15-20 minutes, open your engine and smell. If you smell coolant------engine out time! I guarantee it!

AlexluvsTTs

Thanks for all your input gentlemen!

OK, so why didn't the leak show up when I performed the coolant pressure test? I tested it at 16 psi and let it sit for close to a half hour and the pressure held steady.

Macster

It is not uncommon for a cooling system leak to not show up under a cold pressure test. If the leak is "under water" so to speak the cold pressure alone may not be enough to push any fluid out let alone enough to allow the pressure to drop.

A "hot pressure" test sometimes will turn up a leak while a cold pressure test doesn't.

AlexluvsTTs

Macster how does one perform the hot pressure test accurately and safely?

Dennis C

Mine is a blue cap that ends with "02".

There isn't any sign of a leak around the cap, so I wonder if it's something else? The dealer couldn't find anything...

atcbi5

Drive and smell. Got new wheels,springs, rotors and brakes. Car sits in garage until I can get to it. It sucks for me! Too many other projects around the house. September is when my calendar is free from work related stuff.

jhbrennan

Going to the newer cap is less expensive than dropping the engine so maybe that's step 1 in your diagnosis.

flyjets

whats the cost of this repair?

ian

ljpviper

Guys as silly as this sounds be careful of not cross threading the plastic cap. If you put on normal clockwise it appears to tighten. Well my car smelled like coolant and was loosing just a small amount with no apparent leaks.

I went to a new porsche independent showed me how the system was not holding pressure yet the cap appeared to be on correct. He took the cap off went counter clockwise then clockwise. The smell went away and no more coolant evaporating, the few times I drove the car. He tells me he sees this a lot.

Best 20 ever spent as he did not even want to charge me. I have the newer suncoast cap as well.

nzskater

This has nothing to do with the leak, but: Change the bolts on your headers, they're pretty rusty and will only get worse. Check over the rest of the exhaust as well. The longer you leave it the more time and effort it will take. And the part number for the turbo studs is on the turbo page of the catalog, not the exhaust page...

AlexluvsTTs

Thanks for the recommendation nzskater...I'll put that on the list when I get the TT serviced!

AlexluvsTTs

UPDATE!

I drove it a little more aggressively last week...still no leak, BUT two days later there was the puddle again! I pressure tested it again and sure enough, it began leaking coolant again...arrggh! So there it is, my TT has a leaking coolant hose!

I'm having it serviced in mid April at one of our indie shops here in Calgary (Alpine Autowerks). I'll have them TIG weld the connections. Now, what else should I address while I'm in there with the engine being out guys?

Ironic in that I traded in my 2006 C4S on this car last June as I was somewhat concerned about the whole IMS issue with the 2005-2009 997.1 Carreras. AND now I get this issue on my TT???

jumper5836

Don't worry about that man, you avoided a huge hit if that crap m97 engine would have failed. Pinning your coolant fittings is only a couple k and it will be fixed for good. Other then that the engine is bullet proof. Though while the engine is out maybe looking into preventing a future spun camshaft.
https://rennlist.com/forums/997-turb...-camshaft.html

AlexluvsTTs

Thanks jumper for the link! I'll look into it.

Incidentally, when did you have your TT coolant hose issue addressed? No probs since?

Cheers!

Alex