96 SLS knock

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

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 3 of 3
Northstar Engines and System Technical Discussion Discussion, 96 SLS knock in Cadillac Engine Discussion; I'm looking at a 96 and the owner says he got an oil change and a week later it started ...
  1. #1
    jdmae92 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Dec 2006

    96 SLS knock

    I'm looking at a 96 and the owner says he got an oil change and a week later it started knocking. "It does have a motor knock, doesn't miss or skip a beat but the knock is loud enough to not drive. I got an oil change in it last week and after 1 week the car started to make that noise." Could it be from carbon buildup? Would it show up that fast if it was carbon?

  2. Remove Advertisements

  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: 96 SLS knock

    Carbon build up aka "Cold Carbon Rap" will go away within 60 seconds or so after starting. If it is continuous, it is not likely CCR. I have had CCR show up overnight on my '97 Deville. Quieted down before I got out of the driveway. A dose of WOT keept it from returning for a long time.

  4. #3
    dp102288's Avatar
    dp102288 is offline Cadillac Owners Connoisseur
    Join Date
    Apr 2006
    North Brunswick, NJ

    Re: 96 SLS knock

    ^^ Agree. After the engine is warm, carbon doesn't knock anymore. There was/is an Eldorado for sale near me with a knock, for cheap. I checked it out thinking it was carbon, but after driving for a few minutes, it didn't go away.

    I think a fellow member had a knocking sound. But his problem ended up throwing a rod in his engine!

  5. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

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

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


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.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts