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‘19 S5 Coolant Leak Has Local Euro Shop Stumped
Recently had my car serviced at a local Euro shop as the coolant temp warning kept coming on every day. The image is the work they performed on the car.
https://cimg5.ibsrv.net/gimg/www.aud...34e89701b.jpeg Got the car back and everything was fine, but 2 weeks later the light came back on briefly just once. I then noticed the car was leaking coolant under the passenger side overnight. I brought the car back the shop and they have been unable to reproduce the leak, even after pressure tests, running the car for a while and then leaving it overnight. Nothing I took the car back as they were stumped and of course it's still leaking. I’ve lost enough fluid now that the add fluid light has come on. Any ideas? I just called them and they really seem bewildered. Thanks! |
Why don't they do a dye test so they can trace the leak?
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Originally Posted by JohnEnglish
(Post 25901563)
Why don't they do a dye test so they can trace the leak?
i put down cardboard down last night and I can see drips landing in 4 different locations. I should add that these are significant leaks. There’s a bunch of fluid on the ground. I need to refill the coolant before I bring it back to the shop as the light has come back on. |
I had a coolant leak coming from the turbo. There's 2 pipes that bring coolant in and out and the seals wore out and needed to be replaced.
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Originally Posted by wiltedjoint
(Post 25901608)
I had a coolant leak coming from the turbo. There's 2 pipes that bring coolant in and out and the seals wore out and needed to be replaced.
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It wasn't pouring out but it was all over the underside of the engine.
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Ah, mine is leaking quite a bit on to the ground, passenger side.
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On my 2018 A5, I put in UV dye, ran engine short while, and with a blacklight could see immediately my leak. Even trace it to a 2mm weep hole in the water pump.
Replaced for free as there is a history of water pump premature failures and Audi has a free repair policy thru 80k miles iirc. Others have reported cracks in coolant reservoir, but leak should be more on driver's side. Of course, can come from many other places. Try the dye test.
Originally Posted by djwins
(Post 25901544)
Recently had my car serviced at a local Euro shop as the coolant temp warning kept coming on every day. The image is the work they performed on the car.
https://cimg5.ibsrv.net/gimg/www.aud...34e89701b.jpeg Got the car back and everything was fine, but 2 weeks later the light came back on briefly just once. I then noticed the car was leaking coolant under the passenger side overnight. I brought the car back the shop and they have been unable to reproduce the leak, even after pressure tests, running the car for a while and then leaving it overnight. Nothing I took the car back as they were stumped and of course it's still leaking. I’ve lost enough fluid now that the add fluid light has come on. Any ideas? I just called them and they really seem bewildered. Thanks! |
TSB: "Technical Service Bulletin: 2070349, rev 3, December 12, 2023
https://static.nhtsa.gov/odi/tsbs/20...47198-0001.pdf 19 loss of coolant from coolant pump - V6 TFSI 2070349/3 December 12, 2023. S4, S5, S5 Cabriolet, S5 Sportback, and SQ5 2018 – 2024 Customer states: • Coolant loss/leak. • Coolant warning lamp. Workshop findings: The coolant pump is suspected to be the source of the leak." |
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