Knocking on 03 impala

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Knocking on 03 impala

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Chevrolet Forums >> Chevy Cars >> Impala >> Knocking on 03 impala

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Knocking on 03 impala - 12/10/2007 7:43:47 PM

no_other_lead

Posts: 2
Joined: 12/10/2007
Status: offline

My 03 impala makes a knocking noise when it is cold and goes away when warmed up,i have had people tell me it is the lifters but im not sure.Can anyone help?

Post #: 1

RE: Knocking on 03 impala - 12/11/2007 8:52:13 AM

Gad1357

Posts: 34
Joined: 3/4/2007
Status: offline

Its the lifters goes away after a couple of seconds? Next oil change put in a bottle of Z Max should get a little better.

(in reply to no_other_lead)

Post #: 2

RE: Knocking on 03 impala - 12/11/2007 10:41:28 AM

rbarrios

Posts: 249
Joined: 2/1/2007
Status: offline

not sure how prone the impala engines are to this..
but on the inline 6 trailblazers - and some other engines- they get what is called Cold Carbon knock.
cold engine in the morning- the engine knocks a little. once its warmed up- its quiet.
This noise can be quieted for a bit- by running a bottle of chevron techron to get rid of the carbon buildup.
Mine quiets down a bit. not entirely, but it does help.
if you try chevron- and it doesnt quiet down- then at least you cleaned your injectors, and you then proceed to another cause.

(in reply to Gad1357)

Post #: 3