[mbar]

During my weekend at the track I noticed by chance a little squeak from the engine ( went away after a while). When I popped the hood I noticed the engine pulley ( pic attached) wobble while idling.
Is this normal? Clearly I packed up my stuff and ended the weekend early
Does yours wobble as well?
Thanks for your help

[mbar]

Update - apparently GM has a service bulletin on this issue. For some reason there's an optical illusion making the crank pulley look like it's wobbly.
All is well.

[Mr. Wyndham]

Originally Posted by mbar

Update - apparently GM has a service bulletin on this issue. For some reason there's an optical illusion making the crank pulley look like it's wobbly.
All is well.

My 2014 LS3 did this, too...from different angles the "wobble" looks worse than it is. If there's no bad vibration, noises, or accelerated serpentine belt wear...it's fine.

[glenB]

So what was the noise?

I'd find a point of measure and turn the crank in quarters and measure

[mbar]

Originally Posted by glenB

So what was the noise?

Not sure, but it went away. Might have been a side effect of just finishing a track session.