Engine temperature

Discussion in 'Gen 3 Prius Main Forum' started by livein, Sep 22, 2009.

  1. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    12,471
    6,039
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    Go to ScanGauge's Toyota-specific support page, which happens to point back here to PriusChat and to CleanMPG.com.
     
  2. macman408

    macman408 Electron Guidance Counselor

    Joined:
    Mar 21, 2010
    1,179
    355
    1
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    V
  3. kithmo

    kithmo Couch Potato

    Joined:
    Apr 25, 2010
    2,086
    2,331
    44
    Location:
    South Yorkshire, UK
    Vehicle:
    2016 Prius
    Modern engines mostly have cooling systems that flow through the heater all the time, using flaps to guide the air rather than stopping the coolant flow through the heater core. Although you can't dump the heater core into the system, turning the heat on will still have a cooling effect as you described, due to the extra fan in the heater, but not to such a great degree.
     
  4. ken2116

    ken2116 New Member

    Joined:
    Jun 18, 2019
    7
    5
    0
    Location:
    Northern CA
    Vehicle:
    2019 Prius
    Model:
    LE
    Many reasons to show engine temperature:

    1. Knowing when the engine is warmed up and it's safe to accelerate harder, if desired.
    2. Indicating when one is creeping above normal operating temperature, such as when climbing a long hill at high altitude on a hot day, in time to turn off the AC and turn on the heater, or slow down.
    3. A wide variety of incipient problems often are indicated by anomalous temp gauge behavior, giving time to address them before they leave one on the road. The same goes for knowing ones oil pressure, oil temperature, and charging system voltage.

    Given the choice, I'd much rather have the above information than the cost per gallon calculator and some of the "feel good" mileage history indicators.
     
    davecook89t and CR94 like this.
  5. ken2116

    ken2116 New Member

    Joined:
    Jun 18, 2019
    7
    5
    0
    Location:
    Northern CA
    Vehicle:
    2019 Prius
    Model:
    LE
    What do you consider "better oil", higher viscosity? How high can one go?
     
    CR94 likes this.
  6. dominicIOWA

    dominicIOWA New Member

    Joined:
    Jul 2, 2019
    2
    0
    0
    Location:
    Iowa
    Vehicle:
    2010 Prius
    Model:
    IV
    I use a Bluetooth obdII dongle plugged in and use the torque app on my phone to monitor temps and other things.

    Posted via the PriusChat mobile app.
     
  7. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    2,359
    2,095
    1
    Location:
    BOY
    Vehicle:
    2012 Prius
    Model:
    Four
    Pulease, just drive it.
     
  8. Mendel Leisk

    Mendel Leisk Obtuse Angler

    Joined:
    Oct 17, 2010
    34,577
    23,540
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I found coolant temp informative. It's in there, would love to see it displayed on the dash. In the intermim, ScanGauge or myriad phone apps in conjunction with a OBD dongle can show it. Still, I don't think the OBD port is designed for constance connection; I started getting error messages on the dash (Check Hybrid System) so discontinued use.
     
  9. CR94

    CR94 Senior Member

    Joined:
    Dec 2, 2014
    1,705
    639
    0
    Location:
    Northwestern S.C.
    Vehicle:
    2011 Prius
    Model:
    Two
    I have had my Scangauge connected over 4 years and have never seen such complaint from the car.
     
  10. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    7,503
    5,142
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Robert Holt likes this.
  11. Robert Holt

    Robert Holt Senior Member

    Joined:
    Aug 3, 2013
    1,239
    784
    0
    Vehicle:
    2012 Prius
    Model:
    Three
    I’d agree with Ken2116, because when I tried storming up the ridges of the Appalachians at a constant 70 mph, the Scanguage II reported ICE coolant temp rising slowly to 204 degrees Fahrenheit, which is noticeably higher than the normal 194-196 range. Slowing down to 60 mph for the next ridge climb kept the coolant temp under 200, so that info helped alter my driving tactics.
    Similarly, when the #2 HV battery temperature sensor gets over 40 degrees Celsius and the battery fan motor goes to level 4 or 5, I try to avoid any sharp charging or discharging from the HV battery to try to moderate those higher battery temps.
    (This can be interpreted as either simple obsessive-compulsive disorder, or just a residual habit based on continuously monitoring aircraft systems whilst flying over many years, but some types of complex , human-controlled systems do better when monitored for boundary conditions.j
     
    kc410 and davecook89t like this.
Loading...