Help finding clunk from front-end
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 20
Like Tree1Likes
Cadillac Seville / Cadillac Eldorado Forum Discussion, Help finding clunk from front-end in Past Cadillac Vehicle Discussion; My 2001 STS has developed a clunk in the front, and I'm having a heard time pinpointing the cause. (Around ...
  1. #1
    ocgltd's Avatar
    ocgltd is offline Cadillac Owners Fanatic
    Automobile(s): 2001 STS
    Join Date
    Oct 2008
    Location
    London Ontario
    Posts
    249

    Help finding clunk from front-end

    My 2001 STS has developed a clunk in the front, and I'm having a heard time pinpointing the cause. (Around 4000km ago I had the engine out for a head studs job - in case that's a clue).

    Sometimes I hear it going up a curb (pulling into the driveway) when the FR wheel goes up. I can sometimes reproduce it steering left-right-left-right at low speed (I haven't tried at high speed for obvious reasons).

    It sounds like it comes form the center of the engine compartment, and its a heavy CLUNK sound. It doesn't feel like the clunk is coming up the steering column.

    My guesses are:

    1. engine mount loose
    2. ball joint
    3. stabilizer bar bushing
    4. strut
    5. anything that moves under the hood

    Any suggestions on how to diagnose this?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    oldstuff is offline Cadillac Owners Fanatic
    Automobile(s): 66 convert-93-96-97-97-99 Eldorados
    Join Date
    Nov 2013
    Location
    McCleary Wa.
    Age
    78
    Posts
    409

    Re: Help finding clunk from front-end

    Do a double check of the cradle mounting bolts. sounds like cradle shifting, maybe not tightened when engine work was done.
    Dave


    Quote Originally Posted by ocgltd View Post
    My 2001 STS has developed a clunk in the front, and I'm having a heard time pinpointing the cause. (Around 4000km ago I had the engine out for a head studs job - in case that's a clue).

    Sometimes I hear it going up a curb (pulling into the driveway) when the FR wheel goes up. I can sometimes reproduce it steering left-right-left-right at low speed (I haven't tried at high speed for obvious reasons).

    It sounds like it comes form the center of the engine compartment, and its a heavy CLUNK sound. It doesn't feel like the clunk is coming up the steering column.

    My guesses are:

    1. engine mount loose
    2. ball joint
    3. stabilizer bar bushing
    4. strut
    5. anything that moves under the hood

    Any suggestions on how to diagnose this?

  4. #3
    ocgltd's Avatar
    ocgltd is offline Cadillac Owners Fanatic
    Automobile(s): 2001 STS
    Join Date
    Oct 2008
    Location
    London Ontario
    Posts
    249

    Re: Help finding clunk from front-end

    The engine actually came out the top, so cradle should be tight. But I'll check the bolts...

  5. #4
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    73,342

    Re: Help finding clunk from front-end

    Based on your description I think your could pretty much rule out a motor mount.

  6. #5
    basscatt's Avatar
    basscatt is offline Cadillac Owners Master
    Automobile(s): 89 Coupe DeVille, 95 Sedan DeVille, 03 SLS, two 02 DHS's
    Join Date
    Feb 2004
    Location
    Minnesota
    Age
    63
    Posts
    9,848

    Re: Help finding clunk from front-end

    swaybar link -

    swaybar bushing -

    broken/loose steering rack -

  7. #6
    Yaemish is offline Cadillac Owners Connoisseur
    Automobile(s): 02 Seville, 04 SRX
    Join Date
    Sep 2003
    Location
    NY
    Posts
    1,088

    Re: Help finding clunk from front-end

    Torn rubber in the strut mount?

  8. #7
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
    Join Date
    Sep 2010
    Location
    East Boston MA.
    Age
    26
    Posts
    21,368
    The shake has nothing to do with the sway bar.

    ocgltd, have you checked the control arm bushings?

  9. #8
    ocgltd's Avatar
    ocgltd is offline Cadillac Owners Fanatic
    Automobile(s): 2001 STS
    Join Date
    Oct 2008
    Location
    London Ontario
    Posts
    249

    Re: Help finding clunk from front-end

    OK - I found something! I discovered that on left hand control arm there is a stopper (looks like a 5" piece of black pipe with rubber bushings) for the sway bar, but on the right hand side it is missing. (and I can see shiny metal where it used to be mounted).

    I don't know what this piece is called, but perhaps the sway bar swings too far down and hits the control arm now? Could this be my clunk?

    Would someone know what this piece is called? (I'm guessing it's a dealer only piece).

  10. #9
    basscatt's Avatar
    basscatt is offline Cadillac Owners Master
    Automobile(s): 89 Coupe DeVille, 95 Sedan DeVille, 03 SLS, two 02 DHS's
    Join Date
    Feb 2004
    Location
    Minnesota
    Age
    63
    Posts
    9,848

    Re: Help finding clunk from front-end

    Quote Originally Posted by ocgltd View Post
    OK - I found something! I discovered that on left hand control arm there is a stopper (looks like a 5" piece of black pipe with rubber bushings) for the sway bar, but on the right hand side it is missing. (and I can see shiny metal where it used to be mounted).

    I don't know what this piece is called, but perhaps the sway bar swings too far down and hits the control arm now? Could this be my clunk?

    Would someone know what this piece is called? (I'm guessing it's a dealer only piece).
    --------------------------------
    sway bar link - should be one on each side -

  11. #10
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    73,342

    Re: Help finding clunk from front-end

    Quote Originally Posted by ocgltd View Post
    Would someone know what this piece is called? (I'm guessing it's a dealer only piece).
    This help Any?

    http://www.gmpartsgiant.com/Page_Pro...042&SortKey=18

  12. #11
    ocgltd's Avatar
    ocgltd is offline Cadillac Owners Fanatic
    Automobile(s): 2001 STS
    Join Date
    Oct 2008
    Location
    London Ontario
    Posts
    249

    Re: Help finding clunk from front-end

    Parts 18/19/20/32 combined looks like the tube & bolts that I need. Is this available as a kit? (is 37 the whole kit?)

    Am I interpreting the picture correctly: that the sway bar floats above the tube, and only pushed down on the tube when the other wheel drops?

    Or should the sway bar be permanently connected to the control arm? (Should bolt 18 go through the control arm, through the sway bar, and secure them together? (On my car one side is missing the tube (32) and both sides the end of the sway bar seems to have a strange bolt and bushings attached but free from the control arm.) I'm wondering if maybe the bolt is broken on both sides?

    On both sides the sway bar has a rubber bushing on each side of the sway bar end, and a bolt through it with a strange bolt on the bottom...looks like twisted metal. I'm starting to thing may the bolt is broken on BOTH sides?

  13. #12
    basscatt's Avatar
    basscatt is offline Cadillac Owners Master
    Automobile(s): 89 Coupe DeVille, 95 Sedan DeVille, 03 SLS, two 02 DHS's
    Join Date
    Feb 2004
    Location
    Minnesota
    Age
    63
    Posts
    9,848

    Re: Help finding clunk from front-end

    Quote Originally Posted by ocgltd View Post
    Parts 18/19/20/32 combined looks like the tube & bolts that I need. Is this available as a kit? (is 37 the whole kit?)

    Am I interpreting the picture correctly: that the sway bar floats above the tube, and only pushed down on the tube when the other wheel drops?

    Or should the sway bar be permanently connected to the control arm? (Should bolt 18 go through the control arm, through the sway bar, and secure them together? (On my car one side is missing the tube (32) and both sides the end of the sway bar seems to have a strange bolt and bushings attached but free from the control arm.) I'm wondering if maybe the bolt is broken on both sides?

    On both sides the sway bar has a rubber bushing on each side of the sway bar end, and a bolt through it with a strange bolt on the bottom...looks like twisted metal. I'm starting to thing may the bolt is broken on BOTH sides?
    ---------------------------
    Parts 18/19/20/32 combined looks like the tube & bolts that I need.
    Is this available as a kit? (is 37 the whole kit?)

    SWAY BAR LINK -
    MOOG K5255 - less than $6 per side -

  14. #13
    ocgltd's Avatar
    ocgltd is offline Cadillac Owners Fanatic
    Automobile(s): 2001 STS
    Join Date
    Oct 2008
    Location
    London Ontario
    Posts
    249

    Re: Help finding clunk from front-end

    OK - I'll have to look into the sway bar link for each side. A couple more questions:

    1. I found some comments online about 19 vs 21 mm bars. Would I have to ask the dealer for the size based on my vin?

    2. Is this a DIY job? I also read that you need a lift to do this job...

  15. #14
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
    Join Date
    Sep 2010
    Location
    East Boston MA.
    Age
    26
    Posts
    21,368
    The STS Would have the thicker bar, but that makes no difference, same links. It's an easy DIY job with a jack and stands.

  16. #15
    ocgltd's Avatar
    ocgltd is offline Cadillac Owners Fanatic
    Automobile(s): 2001 STS
    Join Date
    Oct 2008
    Location
    London Ontario
    Posts
    249

    Re: Help finding clunk from front-end

    I there a link for how to do this job? (Only 2 postings I found say you need a lift).

    I'm guessing you need to lift both front sides at once, then sway bar should be free?

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting