Knoc,Knoc sound

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Knoc,Knoc sound - 2/26/2008 11:36:03 AM    trex   Posts: 4 Joined: 2/22/2008 Status: offline I had a 05 Coly 2wd 3.5 5spd that was wrecked and now have a 07 4wd 3.7 and both make a Knoc,Knoc sound from under the cab part of the truck about a min. after I turn it off.It doesn't sound like anything is wrong I'm just curious about what it is,anyone know? Post #: 1

RE: Knoc,Knoc sound - 2/26/2008 7:29:40 PM    EuroGoldLS Posts: 1532 Joined: 7/12/2007 From: Princeton, NC, USA Status: online Its normal. Catalytic converter. Its just cooling down. Sounds like someones thumping on a tin bucket.   All cars do it to an extent, but the newer catalytic converters are made better, so they have a lot more tapping noise than older cars. _____________________________ VOTE for Ride Of The Month!!! PM me for a custom sig or avatar! (in reply to trex) Post #: 2

RE: Knoc,Knoc sound - 2/26/2008 9:23:58 PM    trex   Posts: 4 Joined: 2/22/2008 Status: offline Thanks, I had a feeling that's what it was and you confirmed it. (in reply to EuroGoldLS) Post #: 3

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