# 2009 Cadillac CTS clattering noise

**URL:** <https://community.cartalk.com/t/2009-cadillac-cts-clattering-noise/137925>\
**Category:** Maintenance/Repairs\
**Tags:** cts, cadillac\
**Created:** [April 4, 2019, 12:32pm UTC](https://community.cartalk.com/t/2009-cadillac-cts-clattering-noise/137925 "2019-04-04T12:32:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![JosephEMarcianoSr](https://avatars.discourse-cdn.com/v4/letter/j/ea666f/32.png) [@JosephEMarcianoSr](https://community.cartalk.com/u/JosephEMarcianoSr)\
**Post date:** [April 4, 2019, 12:32pm UTC](https://community.cartalk.com/t/2009-cadillac-cts-clattering-noise/137925/1 "2019-04-04T12:32:37Z")

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Makes clatter noise when starting. 2009 cts

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**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\
**Post date:** [April 4, 2019, 2:46pm UTC](https://community.cartalk.com/t/2009-cadillac-cts-clattering-noise/137925/2 "2019-04-04T14:46:36Z")

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If from the engine, it could be valves before their lifters fill up with oil. If from the exhaust, it could be a heat shield or loose parts inside one of the components. Has the problem come on gradually? How long after the engine starts is the clatter is done?

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**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\
**Post date:** [April 4, 2019, 3:10pm UTC](https://community.cartalk.com/t/2009-cadillac-cts-clattering-noise/137925/3 "2019-04-04T15:10:32Z")

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Cadillac had a known issue with the timing chain back then. I’d suggest having a mechanic listen to it.