Wierd noise! Any advice????

Discussion in 'SVT Tech Forum' started by rio99Cobra, Dec 15, 2006.


  1. rio99Cobra

    rio99Cobra New Member

    Joined:
    Dec 15, 2006
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    0
    Hello,

    I have a 99 Cobra and I have recently noticed what sounds like a grinding noise when I hold the RPM's steady, accelerate very slowly, or back off the throttle (as if you were holding 3500 RPM's and let off the gas peddle, slowly accelerated, etc). It occurs at all RPM's until the car is warm, then disappears. The car has a BBk intake, 62MM throttle body, x-pipe (catless), magnaflows, B&M short throw, drive-line specialties complete rear-end build with 3:73's. I want to let everyone who may read know what is done to the car in case it makes a difference. I consider myself mechanically inclined, but this is my first 4 valve 4.6. My first guess was throw out/pilot bearing? But it sounds like it is coming from the motor. The noise is present when the clutch is engaged or disengaged. The only thing that affects the noise is the car warming up. It had sat for awhile as a weekend driver here in Michigan. I thought the throw out bearing may have siezed some how or something wierd, I don't know, thats why I'm here. Car has 44,000 miles on it. Thanks for any help you may have to offer.
     
    #1
  2. TheCrazy1

    TheCrazy1 New Member

    Joined:
    Dec 9, 2003
    Messages:
    70
    Likes Received:
    0
    Trophy Points:
    0
    Hmmm, I'm not sure what it could be... but does it make the sound if you run the engine in neutral? I really don't have any ideas without hearing it myself. Perhaps a local shop could figure it out? Hope it turns out ok!
     
    #2
  3. Twistedoffpurp

    Twistedoffpurp New Member

    Joined:
    Sep 21, 2006
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    2
    Sounds like a throwout bearing may be the problem. Are there any variations of noise when pushing and releasing the clutch?
     
    #3
  4. rio99Cobra

    rio99Cobra New Member

    Joined:
    Dec 15, 2006
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    0
    I agree, I think it is the bearing myself. I spent some time looking at over the weekend and listening. When I put pressure on the peddle it starts to whine. The clutch feels great, did some nice burn outs after diagnosing it! I think I pull it out this spring and replace the throw out and pilot bearings and put a new clutch in it anyway. I really appreciate the help guys! Thanks!
     
    #4
  5. cold96snake

    cold96snake Active Member

    Joined:
    Jan 27, 2004
    Messages:
    1,717
    Likes Received:
    1
    Trophy Points:
    39
    Location:
    Truly, out to sea
    I think I have the same problem, yet I believe it's the timing chains. And it only happens at low rpm's and low load.
     
    #5

Share This Page