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2007 Denali 6.2l knocks warm under acceleration. New goodwrench motor.

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4 years 11 months ago #44311 by 62gto
2007 Denali 6.2l knocks warm under acceleration. New goodwrench motor. was created by 62gto
2007 Yukon Denali XL has a tapping/ knocking noise under acceleration. Engine is a GM Goodwrench reman. Had noise with old engine as well. Any ideas?

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  • Chad
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4 years 11 months ago #44312 by Chad
Replied by Chad on topic 2007 Denali 6.2l knocks warm under acceleration. New goodwrench motor.
Is it Engine Speed related? Or, Wheel Speed related?
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)

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4 years 11 months ago #44325 by 62gto
Replied by 62gto on topic 2007 Denali 6.2l knocks warm under acceleration. New goodwrench motor.
It seems to be engine speed related, but it will not do it while free revving the engine or brake torquing. Myself and 2 other techs thought it was engine related, hence the new motor.

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4 years 11 months ago #44326 by Noah
Replied by Noah on topic 2007 Denali 6.2l knocks warm under acceleration. New goodwrench motor.
Is the flex plate new or from the old engine?
I imagine if it was damaged you would have not transferred it to the new engine, but it could have been an oversight.
It wouldn't be the first LS engine with a cracked flex plate (flywheel)
"Ground cannot be checked with a 10mm socket"

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4 years 11 months ago - 4 years 11 months ago #44329 by Chad
Replied by Chad on topic 2007 Denali 6.2l knocks warm under acceleration. New goodwrench motor.
A set of "chassis ears" is invaluable for cases like this. I use these.

"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)
Last edit: 4 years 11 months ago by Chad.

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4 years 11 months ago #44353 by 62gto
Replied by 62gto on topic 2007 Denali 6.2l knocks warm under acceleration. New goodwrench motor.
Funny that you mentioned chassis ears. I was using them about the same time as you responded. The noise appears to be coming from the transfer case. Thanks everyone for the help.

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