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  1. #1
    Veteran Member Four Rings arjun90's Avatar
    Join Date
    Dec 27 2014
    AZ Member #
    306064
    My Garage
    2013 Audi Q5 3.0T
    Location
    NY

    Coolant Smell Coming From Front Driver Side Between Engine & Radiator

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    I started the car after such a long time, and sensed a sweet coolant smell coming from the Front Driver Side Between Engine & Radiator. The bottom of my oil pan is a bit moist; used a paper towel and noticed the color pink---indicating coolant leak. Hoses look satisfactory to me, the smell is concentrated between radiator and engine (particularly driver side--near one of the main hoses feeding into the radiator). Can the leak coming from one of the radiator hoses?

    The water pump (and presumably gasket) was replaced last year at the same time when getting the timing belt changed. It would be shocking "if" the shop did not change out all the gaskets and seals; they can never prove it to you if they did unless you, the owner, got to the timing belt area yourself.

    Where should I start in terms of diagnosis?

    Thanks

    (Pictures to posted soon)
    Current:
    | Audi Q5 (B8) 2013 (3.0T, Quattro) |
    70,xxx Miles
    | Audi A6 (C6) Avant, 2010 (3.0T, Quattro) |
    182,xxx Miles
    Gone But Not Forgotten:
    | Audi A6 (C5) Avant, 2004 (3.0L, Quattro) |
    221,386 Miles [April 2014 - March 2022]
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  2. #2
    Veteran Member Three Rings a4kamila6's Avatar
    Join Date
    Sep 30 2015
    AZ Member #
    358945
    Location
    NY

    Leaky thermostat housing? Maybe a tiny leak in hose?

  3. #3
    Veteran Member Four Rings arjun90's Avatar
    Join Date
    Dec 27 2014
    AZ Member #
    306064
    My Garage
    2013 Audi Q5 3.0T
    Location
    NY

    I'm hoping its just a tiny leak in a hose which can be seen visually without removing anything. Thermostat Housing? The thermostat was replaced last year during the timing belt service.
    Current:
    | Audi Q5 (B8) 2013 (3.0T, Quattro) |
    70,xxx Miles
    | Audi A6 (C6) Avant, 2010 (3.0T, Quattro) |
    182,xxx Miles
    Gone But Not Forgotten:
    | Audi A6 (C5) Avant, 2004 (3.0L, Quattro) |
    221,386 Miles [April 2014 - March 2022]
    New genuine Audi/VW parts for cheap within the US - audiusaoemparts.com
    New genuine Audi/VW parts for cheap if you can afford the wait - oemVWshop

  4. #4
    Senior Member Three Rings massboykie's Avatar
    Join Date
    Mar 14 2008
    AZ Member #
    26426
    My Garage
    '16 Audi S6, '16 Audi S5 Cab.
    Location
    Natick, MA

    Hi Arjun

    Mine did the same thing and it ended up being the secondary coolant pump that sits under the intake manifold. If you shine a flashlight in behind the throttle body you should be able to see if there is any pink residue around the pump etc.

    Hope that helps

    Cheers
    Massboykie
    2016 Audi S5 Cab. - ECS Intake, K&N DI
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