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Sts rattling noise at cold start????

11K views 8 replies 4 participants last post by  E1971 
#1 ·
My 2006 STS has been making a rattling noise at start up. It only happens when the engine is cold. Has anyone experienced this problem?
 
#6 ·
Well so much for those ideas! Now here's another possibility. The AC compressor can make noise due to 2 different conditions. If the clutch is engaged, it could signal internal compressor problems. If the clutch is disengaged (AC off) it could signify problems with the clutch bearing which only has relative movement when the AC is off. So next time leave the climate control on when you shut down and see if that makes a difference.
 
G
#9 ·
I am currently experiencing the same thing with a 2005 STS. When cold it will grind everyday on startup. It shut down twice last week and yesterday at startup it made the noise and continued and I could smell the metal...

Any thoughts??
 
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