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    VWVortex


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    Thread: Mk3 2.0 overheat

    1. Junior Member
      Join Date
      Jul 9th, 2009
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      Eastern Montana
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      00 GTI, 95 Jetta
      10-03-2012 07:46 PM #1
      Hey everyone,

      I have a Mk3 Jetta 2.0 and am having some problems with it getting hot. I heard that when you turn on your A/C that the radiator fans should come on. I gave it a try and no dice. What is the first step I should take in fixing this?

      Thanks!

    2. Member
      Join Date
      Mar 6th, 2002
      Location
      Morris Plains, NJ
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      1998 GTI 2.0T
      10-04-2012 10:18 AM #2
      Define "getting hot". Is the gauge just creeping to the 3/4 mark, or pegging with boiling coolant pouring out?

      Does the A/C work?

      Does the car overheat in traffic or while at idle? While moving at 70mph on the highway?

      Is the coolant level full?
      2012 Corolla
      1998 GTI 2.0T

      World Automotive
      Need any VCDS (VAG-COM) diagnostics or coding in the North NJ area? PM me.

    3. Junior Member
      Join Date
      Jul 9th, 2009
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      Eastern Montana
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      00 GTI, 95 Jetta
      10-04-2012 12:54 PM #3
      Quote Originally Posted by Anony00GT View Post
      Define "getting hot". Is the gauge just creeping to the 3/4 mark, or pegging with boiling coolant pouring out?

      Does the A/C work?

      Does the car overheat in traffic or while at idle? While moving at 70mph on the highway?

      Is the coolant level full?
      Hot as in going to 3/4 of the gauge, almost all the way

      A/C hasn't worked as long as we have had the car, heat works great though lol

      In traffic/around town and at idle, haven't taken it on the freeway long enough to check if it does it then. Don't want to take it too fast right now as I am getting a weird clunking/rubbing sound/vibration from the front since having a new clutch installed.

      Thanks!

    4. Member
      Join Date
      Mar 6th, 2002
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      Morris Plains, NJ
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      1998 GTI 2.0T
      10-04-2012 02:22 PM #4
      If the A/C doesn't work, the fans won't turn on when you turn the switch on. The FCM commands them with compressor clutch engagement.

      When the needle passes the 3/4 mark, are the fans running?

      Do both radiator hoses get hot, or just the upper?
      2012 Corolla
      1998 GTI 2.0T

      World Automotive
      Need any VCDS (VAG-COM) diagnostics or coding in the North NJ area? PM me.

    5. Junior Member
      Join Date
      Jul 9th, 2009
      Location
      Eastern Montana
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      00 GTI, 95 Jetta
      10-12-2012 01:47 PM #5
      The car does cool off when you go on the interstate even briefly, haven't checked the bottom hose yet though.

    6. Junior Member
      Join Date
      May 3rd, 2011
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      22
      Vehicles
      98 VW Golf GL 2.0L
      10-12-2012 05:58 PM #6
      Don't wait until you blow the heater core. Believe me. Take care of that asap!

      You might need to replace the thermostat if the lower hose is still "cool".

      You might have to replace the fuse(s) in the fan module or the whole fan module.

      check the fans by doing this:
      http://www.youtube.com/watch?v=JZCrTHcXo6Y

      Run the "Heat" to help cool the water in the meantime (Little trick).
      OBL Dead = EPIC WIN!

    7. Junior Member
      Join Date
      Jul 9th, 2009
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      Eastern Montana
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      00 GTI, 95 Jetta
      10-13-2012 04:31 PM #7
      Quote Originally Posted by juancarv View Post
      Don't wait until you blow the heater core. Believe me. Take care of that asap!

      You might need to replace the thermostat if the lower hose is still "cool".

      You might have to replace the fuse(s) in the fan module or the whole fan module.

      check the fans by doing this:
      http://www.youtube.com/watch?v=JZCrTHcXo6Y

      Run the "Heat" to help cool the water in the meantime (Little trick).
      Does that work on a 2.0 as well?

    8. Junior Member
      Join Date
      May 3rd, 2011
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      98 VW Golf GL 2.0L
      11-02-2012 10:53 AM #8
      Yes.

      My 2ltr was not lowering the temp while driving and I waited a little too long to replace the thermostat, that sucker wasn't opening so the coolant was not flowing through the system and was building pressure in the engine block. Blew up my heater core, not to mention the disaster the steam and coolant caused inside the cabin.
      OBL Dead = EPIC WIN!

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