Turbo Turning Red Hot On 97' A4

Discussion in 'OT Driven' started by RalphL, Jun 29, 2008.

  1. RalphL

    RalphL Active Member

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    My buddy has a 97' a4 1.8t and was fucking around in a parking lot when his transmission started acting up (auto). It would take off slow and struggle (imagine taking off in 2nd gear on a manual transmission) and take a while to shift. We popped the hood and his turbo was red hot. He let it cool down and doesnt have any problems now, except when the car down shifts when he slows down you can feel it down shift (best way i can describe it). Now my 89' 525i did this (being able to feel it down shift) before its transmission died. Anyone got a clue what the problem is? The car has about 120,000miles and is bone stock
     
  2. laydback

    laydback New Member

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    tranny issues.... turbos are supposed to turn red when their boosting hard
     
  3. ittech

    ittech "If You're Not Part of the Solution, There's Good OT Supporter

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    turbo's get red hot, I would just be happy that a VWAG automatic lasted to 120k
     
  4. zmiller91

    zmiller91 New Member

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    haha, youd be suprised. i have 110k and im going strong. dont fuck around in a turboed automatic car, its virtually pointless, chances are youll confuse the computer and fuck something up.
     
  5. art_VW_shark

    art_VW_shark OT Supporter

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    :o
     
  6. RalphL

    RalphL Active Member

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    so his transmission's on the verge of dying? :o
     
  7. deusexaethera

    deusexaethera OT Supporter

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    I don't think it's either of those problems.

    1. It's normal for the turbo to get red-hot (or even orange) , because there's this thing sitting in the way of 1000-degree exhaust gases and not letting them go out the tailpipe until they do more work first. That gives the gases plenty of time to conduct their heat into the turbo. I installed a cooldown timer in my Passat for this very reason, so I can jump out of the car when I get to work and not have to worry about my engine oil sitting in the turbo and turning into tar.

    2. The symptoms you describe sound like a classic vacuum leak problem. My Passat has an AEB engine (which is the same yours has, IIRC), and I had all kinds of problems until I replaced all the small vacuum hoses and one-way vacuum valves, and also replaced the main PVC breather hose coming out of the side of the engine. Damn thing was broken completely in half.

    Post a complete list of repairs that have been done on the car and I'll tell you what's left to do.
     
  8. dr.zed

    dr.zed DR.ZED OT Supporter

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    Plugged cat.
    Running lean.
     
  9. dr.zed

    dr.zed DR.ZED OT Supporter

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    ...oh yeh... fuck you Dex.
     
  10. deusexaethera

    deusexaethera OT Supporter

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    That was just uncalled for. I was offering to help.
     
  11. dr.zed

    dr.zed DR.ZED OT Supporter

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    Its always called for when it comes to you.
     
  12. deusexaethera

    deusexaethera OT Supporter

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    Go to hell.
     

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