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View my fuel log 2015 Mirage DE 1.2 manual: 48.5 mpg (US) ... 20.6 km/L ... 4.8 L/100 km ... 58.3 mpg (Imp)
What you could do:
Push the driver seat all the way back, and remove the horizonal piece of plastic cover that would be above your shins. It is held by three small plastic clips that need to be unscrewed with a very small screwdriver. Take them out carefully for reuse. When the clips are out, the cover is loose.
Then get your head right next to the gas pedal, looking towards the heater assembly, which is most uncomfortable.
There you can see two shiny coolant pipes coming through the firewall towards the cabin and going into the heater assembly and the heater core. There is one sort of bulge in each pipe.
That bulge is the crimped connection with O-rings as a seal.
If some goof bent or twisted it too much during installation, it will have become deformed and leak. Probably that can be repaired with the help of a variety of good pliers. If you take a good look you will see.
If the leak actually does come from the heatercore itself, you may want to consider bypassing it, provided your Florida climate lets you get away with that. Heater core replacemaent is not trivial, see a few threads in this forum.
Last edited by foama; 09-06-2021 at 12:34 PM.
Casey (09-06-2021)
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View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)
Casey (09-06-2021)
Are these o-rings on the engine side of the firewall?
See post number 22
Last edited by Eggman; 09-06-2021 at 12:33 PM. Reason: Fixed BB Code
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View my fuel log 2015 Mirage DE 1.2 manual: 48.5 mpg (US) ... 20.6 km/L ... 4.8 L/100 km ... 58.3 mpg (Imp)
We are finally getting some sub 40F temps here in Florida and I got motivated to check this out. Bummer that it doesn't look like the crimp connections are a problem. Unless, it's leaking on at the connection on the inside of the plastic box. When it's running I can see coolant leaking out the seam of the plastic box on the same side as the connections and the lower side of the box. Was hoping to drive with heat tomorrow morning!
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View my fuel log 2015 Mirage DE 1.2 manual: 48.5 mpg (US) ... 20.6 km/L ... 4.8 L/100 km ... 58.3 mpg (Imp)
If it is the heater core leaking, (which it sounds like it is) at least there's a faster way to replace it now without tearing your entire car apart. There's a thread about it somewhere here.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)
mohammad (01-17-2022)
Thanks. I did see that thread. I'm not convinced it's not the o ring. It almost seems like the leak is intermittent. I tried squeezing on the connections and thought for awhile I had it fixed. Such a hard place to get access I couldn't tell if my squeezing was doing anything or not. I'm going to have heat in the morning tomorrow though! I left it all connected but carrying my bypass and a jug of coolant with me on my long commute.
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View my fuel log 2015 Mirage DE 1.2 manual: 48.5 mpg (US) ... 20.6 km/L ... 4.8 L/100 km ... 58.3 mpg (Imp)
I'm not celebrating yet but monkeying around with those crimped fittings may have helped. I couldn't really tell if I was accomplishing anything but I made my 80 mile drive this morning with blazing heat and no sign of a leak.
I also added a screw down hoseclamp to the hose on the engine side of the firewall. After testing it, it was leaking out there too. I'm pretty sure it wasn't leaking there before and it was just an anomaly after taking out my bypass but perhaps that was the original issue and I just couldn't see it leaking there before. Keeping my fingers crossed!
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View my fuel log 2015 Mirage DE 1.2 manual: 48.5 mpg (US) ... 20.6 km/L ... 4.8 L/100 km ... 58.3 mpg (Imp)