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Coolant smell through vents... 1.2 TSI

Discussion in 'Ibiza Mk5 (2008-2017)' started by raveydave76, Oct 18, 2019.

  1. raveydave76

    raveydave76 Active Member

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    Hi folks,

    2014 Seat Ibiza 1.2 TSI FR ST (50k miles)

    Looking for a bit of advice. About a week ago I began to smell what I'm fairly sure is coolant coming through the air vents. It's pretty distinctive and occurs after the car has warmed to temperature and is stopped (e.g. in traffic).

    Some weeks prior to smelling this for the first time I had to top-up the coolant from minimum to maximum and since then the level has dropped slightly so it would appear that she is losing coolant somewhere in the system. There is no sign of any leak beneath the engine.

    I took her into the garage this week and they identified and replaced a failing water pump. However there has been no change in the symptoms as in the way into work this morning exactly the same thing happened.

    Has anyone else with this engine experienced this? Could this be a failing heater core? If so is this a big effort on the Ibiza (as with some other cars).

    Any pointers gratefully received.
     
    ITzadamZz likes this.
  2. ITzadamZz

    ITzadamZz Active Member

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    I have a 2016 Seat Ibiza FR with 50,000K Miles.

    The Air Conditioning problem I HAVE is that smelling burning while driving with the Heating on maxium Heat. This smell does not occur while AirConditioning is on cold.

    Inital thought, I put this fault down to installing an Performance intercooler, which is dragging warm air in from the engine bay, that is hot and then is getting re-heated by the radiator. And this was down to the burning smell.

    However, I think this is down to needing an AirConditioning 'recharge'. I am going to take down to the local QickFit as i drive past every morning and inform them of my issue as they advertise 'Full Airconditioning recharge service'.

    But Any Ideas?
    (Intresting we both have the same millage.
     
  3. RUM4MO

    RUM4MO Active Member

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    I'd start with using an AC "bomb" to kill any bugs in the air box-evaporator area as sometimes these smells come from that, plus you are normally advised to sanitise that area every year or so to avoid the growth of bugs in there.
     
  4. RUM4MO

    RUM4MO Active Member

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    If you are lucky, it might just be some coolant that has been spilt in the engine compartment which should eventually go away, or the smell will.- if not you probably know what else it could end up being!
    Again, after checking for any spilt coolant from before or at the repair time I'd use an AC "bomb" to try to kill that smell, they don't cost much from ECP and if the smell comes back then you know that you have another nastier problem.
     
  5. raveydave76

    raveydave76 Active Member

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    Hi there - just back to this after a while and symptoms are exactly the same. I don't suppose it is possible to diagnose a bust heater matrix...?
     
  6. RUM4MO

    RUM4MO Active Member

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    I'd expect that you would have to open up the plenum airbox thing that the heater matrix is located within before coming to any conclusions, though if you have carefully examined all the rest of the cooling system for signs of leakage, then the matrix being hidden, is the most likely source of this problem. Getting the system pressure tested by a garage might help a bit, though it does sound like it is a minor but annoying leak.

    Edit:- also, it is quite a time consuming job to replace a heater matrix in these cars I think - no experience of doing that, just worked that out from looking at these heater assemblies.
     
  7. ITzadamZz

    ITzadamZz Active Member

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    This is a very Strange Occurrence, theres obviously a common fault somewhere?
     

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