Diagnosis Needed

Discussion in 'SRT Hellcat Racing Forum' started by Hammer Down, May 21, 2016.

  1. Hammer Down

    Hammer Down Gold Member

    Joined:
    Jan 11, 2016
    Messages:
    400
    Likes Received:
    253
    Trophy Points:
    233
    Location:
    South Jersey
    Vehicle:
    Challenger SRT Hellcat
    Went to Atco last night and made my first passes in the car. First one was a bit embarrassing. LOL. Never launched it before, never on DR's. Never using a helmet. Was nervous as hell...blah blah blah. 2nd pass not the greatest launch, but managed to go 11.8 @ 127mph. After clearing the stripe and slowing I heard a weird whine from the engine bay. It went away by the time slip shack. Back in the pit, heading for home I was pulling out of the aisle. Sitting idle for a few seconds it started again. Very loud. Seems to be some actuator or small motor. Shut car down and it would wind down after shut down. Start car and it would take a few seconds for it to start. As it starts and stops happening there is a noticeable shudder in the car. On the way home it was silent until I got her in the driveway to wipe the front end down. This is just quick video of it just before leaving the track last night around 11pm. Any ideas?

     
  2. dragrcr

    dragrcr Gold Member

    Joined:
    Sep 30, 2015
    Messages:
    846
    Likes Received:
    392
    Trophy Points:
    313
    Location:
    PASADENA, CALIFORNIA
    Vehicle:
    Challenger SRT Hellcat
    Wow, I am sorry to hear that. I think some have had the blower drive come apart or possibly it slipped the crank pulley. Slight chance it is an idler pulley..........Either way I would call the dealer Monday morning and see if they want to tow it or if they want you to drive it in. If it slipped the crank pulley it trashes the crank = New engine.
     
  3. fnkychkn

    fnkychkn swollen member Gold Supporting Member

    Joined:
    Jan 24, 2015
    Messages:
    1,369
    Likes Received:
    486
    Trophy Points:
    368
    Location:
    plastic take-out container
    Vehicle:
    Charger SRT Hellcat
    How about a video of it starting up and shutting down... in better light.
     
  4. MABBRYFL30

    MABBRYFL30 NYS President Hellcat Car Club Gold Supporting Member

    Top Poster Of Month

    Joined:
    Feb 10, 2016
    Messages:
    4,588
    Likes Received:
    1,825
    Trophy Points:
    568
    Vehicle:
    Challenger SRT Hellcat
    I agree with fc. Something sounds wrong
    Post some good info and you will get some ideas. Don't fret though. Always assume that better things are already here. People can help
     
  5. Hammer Down

    Hammer Down Gold Member

    Joined:
    Jan 11, 2016
    Messages:
    400
    Likes Received:
    253
    Trophy Points:
    233
    Location:
    South Jersey
    Vehicle:
    Challenger SRT Hellcat
    Completely pissed. Here you go.

     
  6. TallCool1

    TallCool1 Gold Member Hellcat Car Club Gold Supporting Member Nat'l Hellcat Tech Advisor HCC Charter Member

    Joined:
    Jan 5, 2015
    Messages:
    2,392
    Likes Received:
    791
    Trophy Points:
    458
    Location:
    Pacific NW
    Vehicle:
    Challenger SRT Hellcat
    What mods have been done and anything recent?
     
  7. fnkychkn

    fnkychkn swollen member Gold Supporting Member

    Joined:
    Jan 24, 2015
    Messages:
    1,369
    Likes Received:
    486
    Trophy Points:
    368
    Location:
    plastic take-out container
    Vehicle:
    Charger SRT Hellcat
    hate to be a pain but can you aim the camera at the serpentine belt during shut down. i want to see the engine actually stop and compare the sound. hope that makes sense.
    also, the rpm of the sound seems to increase just before you shut it down. does the engine rpm also increase?
     
  8. goingsolo2

    goingsolo2 Beast will be back bigger and better than ever! Hellcat Car Club Gold Supporting Member Hellcat Supporting Vendor

    Joined:
    Oct 29, 2014
    Messages:
    1,478
    Likes Received:
    581
    Trophy Points:
    313
    Location:
    Long Island, NY
    Vehicle:
    Challenger SRT Hellcat
    Woh...that's not good...no CEL codes?
     
  9. TallCool1

    TallCool1 Gold Member Hellcat Car Club Gold Supporting Member Nat'l Hellcat Tech Advisor HCC Charter Member

    Joined:
    Jan 5, 2015
    Messages:
    2,392
    Likes Received:
    791
    Trophy Points:
    458
    Location:
    Pacific NW
    Vehicle:
    Challenger SRT Hellcat
    Hmm seems both vids car is warm. Could it be something is in contact with a cooling fan?
     
  10. goingsolo2

    goingsolo2 Beast will be back bigger and better than ever! Hellcat Car Club Gold Supporting Member Hellcat Supporting Vendor

    Joined:
    Oct 29, 2014
    Messages:
    1,478
    Likes Received:
    581
    Trophy Points:
    313
    Location:
    Long Island, NY
    Vehicle:
    Challenger SRT Hellcat
    That's a good thought...because when he turns the car off, it gradually goes away...not instantly. Maybe one of the fan relays is bad? I would think if it were the supercharger, it would occur right away, not after a few seconds or so.
     
  11. TallCool1

    TallCool1 Gold Member Hellcat Car Club Gold Supporting Member Nat'l Hellcat Tech Advisor HCC Charter Member

    Joined:
    Jan 5, 2015
    Messages:
    2,392
    Likes Received:
    791
    Trophy Points:
    458
    Location:
    Pacific NW
    Vehicle:
    Challenger SRT Hellcat
    When noise begins after start, then rpm increases, kinda seem fan related; fans start and noise starts, and the noise rpm increase might be fans switching too high. I would think under bright light and a buddy starting and stopping car you could pinpoint noise source fast.
     
  12. goingsolo2

    goingsolo2 Beast will be back bigger and better than ever! Hellcat Car Club Gold Supporting Member Hellcat Supporting Vendor

    Joined:
    Oct 29, 2014
    Messages:
    1,478
    Likes Received:
    581
    Trophy Points:
    313
    Location:
    Long Island, NY
    Vehicle:
    Challenger SRT Hellcat
    Agreed^^^ It sounds related to the fans and fan speed. Maybe something is touching the fan blades as mentioned above.
     
  13. Hammer Down

    Hammer Down Gold Member

    Joined:
    Jan 11, 2016
    Messages:
    400
    Likes Received:
    253
    Trophy Points:
    233
    Location:
    South Jersey
    Vehicle:
    Challenger SRT Hellcat
    Yeah, it doesn't start til it reaches full temp. I had upper pulley done and obviously a pcm swap and tune. The only other thing done was 180 degree tstat. It doesn't start right away. And it only happens at idle. I (probably stupidly) drove it home from Atco last night. The sound was gone until I got home in the driveway. I got out to open the garage and it started. So it is definitely temp related. When I did the last video it took until full temp to start happening. If it were the fan hitting something I couldn't imagine why I would feel such a shudder as it stops.
     
  14. fnkychkn

    fnkychkn swollen member Gold Supporting Member

    Joined:
    Jan 24, 2015
    Messages:
    1,369
    Likes Received:
    486
    Trophy Points:
    368
    Location:
    plastic take-out container
    Vehicle:
    Charger SRT Hellcat
    start it cold and turn on AC. that should start the fan. or, better still. try spinning the fan by hand.
     
    • Agree Agree x 1
  15. Link

    Link Silver Member

    Joined:
    Jan 27, 2015
    Messages:
    794
    Likes Received:
    159
    Trophy Points:
    153
    Vehicle:
    Challenger SRT Hellcat
    HELP, just installed pcm, car won't run. Tries to start then dies. No codes
     

Share This Page

Search tags for this page

challenger hellcat bad bearing pulley