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 ...
- 12-24-06 05:23 PM #1Cadillac 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?
- 12-24-06 05:39 PM #2
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.
- 12-27-06 02:07 PM #3
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!
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