Engine Overheating @ Idle

Discussion in 'SN95 4.6L Mustang Tech' started by Bob Hughes, Nov 29, 2012.


  1. Bob Hughes

    Bob Hughes Member

    Joined:
    Dec 27, 2011
    Messages:
    327
    Likes Received:
    15
    Trophy Points:
    19
    Location:
    Mount Laurel, NJ
    Having an issue with my car....since its getting colder I start it and let it warm up before I drive. It has now twice coughed out fluid through the reservoir cap, and began to overheat....New 180 degree thermostat....never had a problem before supercharger install...reservoir not overfilled...I'm gonna start with the fan see if its coming on...any ideas would be great
  2. pmanchin

    pmanchin New Member

    Joined:
    Aug 18, 2012
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    2
    The cooling system is self pressurized and aides in maintaining a cool temperature. If your pressure cap is faulty, it may need replacing if its not holding proper pressure.

    PDM Designers


    Sponsored Ad

  3. trinity_gt

    trinity_gt Advanced Member

    Joined:
    Jan 31, 2003
    Messages:
    3,035
    Likes Received:
    64
    Trophy Points:
    69
    Location:
    Canada
    Does the cooling fan run?

    Does the fan turn easily?

    What does the temperature gauge do?
  4. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

    Joined:
    Nov 30, 1999
    Messages:
    6,116
    Likes Received:
    709
    Trophy Points:
    164
    Location:
    Somewhere on a hill in the PA wildnerness
    is your water pump leaking out the week hole?
  5. Bob Hughes

    Bob Hughes Member

    Joined:
    Dec 27, 2011
    Messages:
    327
    Likes Received:
    15
    Trophy Points:
    19
    Location:
    Mount Laurel, NJ
    I haven't seen any leaks...if I start it and let it warm up it will just continue to get hot and blow coolant out of reservoir. I'm gonna check the fan in the daylight tonorrow....pretty sure it kicks on. I picked up a new reservoir cap today.
  6. pmanchin

    pmanchin New Member

    Joined:
    Aug 18, 2012
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    2
    Is the system free of air?

    PDM Designers
  7. Bob Hughes

    Bob Hughes Member

    Joined:
    Dec 27, 2011
    Messages:
    327
    Likes Received:
    15
    Trophy Points:
    19
    Location:
    Mount Laurel, NJ
    Something I never thought of....how would you purge it?cuz it started sfyer i installed the supercharger.
  8. pmanchin

    pmanchin New Member

    Joined:
    Aug 18, 2012
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    2
    There should be a bleeder valve on the housing. A basic Phillips or flat head that you screw out. Bleed it until its only coolant.

    PDM Designers
  9. Bob Hughes

    Bob Hughes Member

    Joined:
    Dec 27, 2011
    Messages:
    327
    Likes Received:
    15
    Trophy Points:
    19
    Location:
    Mount Laurel, NJ
    Ok....so I popped the bleeder out seemed to get some air before fluid....for heck of it put Di-electric grease on the plug for the fan. Let car run for 30 minutes thermostat opened as it should fan kicked on no fluid blowing out....crossing fingers for a permanent fix
  10. pmanchin

    pmanchin New Member

    Joined:
    Aug 18, 2012
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    2
    Keep us posted. I'm hoping its all fixed. Sometimes its just simple things.

    PDM Designers
  11. Bob Hughes

    Bob Hughes Member

    Joined:
    Dec 27, 2011
    Messages:
    327
    Likes Received:
    15
    Trophy Points:
    19
    Location:
    Mount Laurel, NJ
    Let the car sit and idle for an hour this morning...no issues....drove all morning doing Christmas shopping...stop and go no issues...hopefully its resolved.
  12. pmanchin

    pmanchin New Member

    Joined:
    Aug 18, 2012
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    2
    Awesome!

    PDM Designers

Share This Page