Belt Idler Pulley Question
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
Results 1 to 8 of 8
5.0 and 5.7 Discussion, Belt Idler Pulley Question in Cadillac Engine Technical Discussion; Here's an easy question for seasoned Fleetwood owners: How long does the serpentine belt idler pulley last? (It looks so ...
  1. #1
    Timothy60 is offline Cadillac Owners Fanatic
    Automobile(s): 1993 Cadillac Fleetwood
    Join Date
    Oct 2005
    Location
    Syracuse, NY
    Posts
    150

    Belt Idler Pulley Question

    Here's an easy question for seasoned Fleetwood owners: How long does the serpentine belt idler pulley last? (It looks so cheap and flimsy.) I'm assuming that the pulley on my 93 Fleetwood is original. With 154,000 miles on the clock, do you think it's time to replace it? How much does it cost and what are some of the problems/issues encountered when replacing it? Thanks.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    85_fleetwood's Avatar
    85_fleetwood is offline Cadillac Owners Member
    Join Date
    Mar 2006
    Location
    Knoxville, TN
    Posts
    52

    Re: Belt Idler Pulley Question

    Get yourself a belt tension gauge and check it.

    Find out what the belt tension is supposed to be and see if yours is still within specs.

  4. #3
    90Brougham350's Avatar
    90Brougham350 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 FWB, 93 SDV, 94 FWB (sold), 90 Brougham (sold)
    Join Date
    Jan 2005
    Location
    River Falls, WI
    Age
    29
    Posts
    3,730

    Re: Belt Idler Pulley Question

    Check it for any cracks or tearing or pulling. It's a cheap part, I paid I think perhaps $30 for the nice one, it's a Goodyear Silent or something like that, I can't remember, but replacing it is laughably simple. The routing is on a sticker under the hood, just like the emissions sticker.

  5. #4
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,512

    Re: Belt Idler Pulley Question

    My 96 Suburban went 210K on stock one. They last a long while. If they start sqealing, then replace them. Mine started sqealing and in a thousand miles or so seized and melted the belt.

  6. #5
    Timothy60 is offline Cadillac Owners Fanatic
    Automobile(s): 1993 Cadillac Fleetwood
    Join Date
    Oct 2005
    Location
    Syracuse, NY
    Posts
    150
    Thread Starter

    Re: Belt Idler Pulley Question

    Sounds good, thanks. I was just curious if the idler pulley gave any advance notice of imminent bearing failure or if it simply siezed up and shredded the belt. I suppose I'll wait for the squeal, then R & R within 1000 miles unless I happen across an extra $30 in my wallet before then.

  7. #6
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,512

    Re: Belt Idler Pulley Question

    On mine, the pulley was $50 with bearing, bearing only $10. And very easy to swap. I just put the pulley in a vise (not hard, just to stabiltize) and then hammered out with a socket on the edges of the bearing and tapped in new one same direction. Took all of 15 min, start to finish on the whole project.

    Pretty much if it is quiet, drive normally. If it is noisy, then consider worrying, it will get worse before it fails. These are sealed bearings and they live a LONG time.

    My 94 LT1 is on factory ones from what I can tell. I haven't noticed any repairs for them in the records, but I wasn't looking specifically for that.

  8. #7
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
    Join Date
    Feb 2005
    Location
    Southern NJ
    Age
    52
    Posts
    2,096

    Re: Belt Idler Pulley Question

    The idler pulley itself can last a good long time if it was a good bearing to begin with. Some replacement bearings have a little tin shield instead of a seal. These do not last unless used with a fresh supply of lubricant. If the car was taken to a chain repair place where the "technicians" make their $ selling easy to replace stuff then it might have changed to a cheapie type. Always look for an Orange seal and not a metal shield with a few slots. BTW, same bearing was used as an alternator shaft bearing in many GM cars.
    Now, if we are speaking of a belt tensioner there are 3 failures. 1st is the bearing. These can fail without ANY NOISE so don't write it off as good without a check. With the belt off, give the pulley a spin. If it is loose of feels anything but smooth it is worn.
    2nd failure is the spring in the tensioner. The thing may bounce all over the place with the engine running when the spring wears out. This spring sets the belt tension. If certain accessories like the alternator squeel under high loads with a fresh dry (no oil leaks) fan belt then suspect a wimpy tensioner.
    3rd is a worn out pivot. A worn out pivot allows the tensioner pulley itself to move at a slight angle to it's proper plane. This will show up with the belt riding on 1 edge of the pulley. Any indication of fraying on one side of the slurpentine belt is a hint to look for a bad tensioner pivot. After a while the belt will fly off. Tensioners can be examined for rust near the pivot spring area. The bad ones sometimes give away their condition with a nice little rust trail.
    Most belt tensioners are a cake walk to replace.

  9. #8
    Timothy60 is offline Cadillac Owners Fanatic
    Automobile(s): 1993 Cadillac Fleetwood
    Join Date
    Oct 2005
    Location
    Syracuse, NY
    Posts
    150
    Thread Starter

    Re: Belt Idler Pulley Question

    Thanks for the information. Both pulleys must contain excellent quality bearings. Interesting about the alternator pulley bearing, too. It seems worthwhile to replace the idler pulley bearing sometime in the 150,000-200,000 mile range before it has the opportunity to sieze and shred the serpentine belt.

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