My defrost kicks more ass than Steven Segal. The G4 too, even with a crimp pipe on the heater core.
FWIW: just bought digital thermometer at harbor freight and checked passenger and driver vents. 139-140 degrees F at both on 2017 G4 with 29K miles. Will continue to monitor this winter.
Last edited by AtomicPunk; 11-17-2019 at 10:46 PM.
View my fuel log 2018 Mirage ES 1.2 manual: 43.5 mpg (US) ... 18.5 km/L ... 5.4 L/100 km ... 52.2 mpg (Imp)
It’s T-shirt weather here right now, 52f!
View my fuel log 2014 Mirage SE 1.2 automatic: 37.0 mpg (US) ... 15.7 km/L ... 6.4 L/100 km ... 44.4 mpg (Imp)
If you're going to test for a restricted heater core, you need to establish some consistent test conditions.
Here's an excerpt from the unofficial TSB I wrote for the problem...
See my test results in this post. I literally drove around all last winter with temperature probes coming out of my vents.
Last edited by Top_Fuel; 11-18-2019 at 01:36 AM.
View my fuel log 2015 Mirage ES 1.2 manual: 51.7 mpg (US) ... 22.0 km/L ... 4.5 L/100 km ... 62.1 mpg (Imp)