noticed a loud chirping sound yesterday, thought it was my tensioner bearing
so i replaced it. turns out it wasnt that so i turned the truck on and got under it.. i noticed the crank wobbled a little so i sprayed some wd40 and it stopped the chirp. anything i should look for when i pull off the crank pulley??

any info would help, thanks!! 01 4.8 with a mp112 on 12 psi, btw

 

you're hearing the harmonic balancer slipping on the crank itself
you must pin the crank

critical mass with a 2.8" for sure totally dude

take the balancer off and use some fine emery cloth on it befor re-install and pin it already

ps buddys truck has had a magna doodle wet noodle for 10 years
no slippy ........................operator error?

 

What he said. I think??? F_ck I'm not really sure... What did you say again?

 

I said pin the crank if you're blown

 

problem fixed! and yes, if your gonna be boosting over 9 or 10 psi get your **** pinned... i feel 4200 pounds lighter!!

Thanks Don!

 

LMAO magna doodle


The moral of the story here kids is if your crank is going to get blown , pin it before you spin it hahahahahaha.

 

NVM problem not fixed, started squeaking again. ill remove the balancer tomorrow and take some pix

 

ouch! gl man on solving the problem

 

sounds like the balancer is loose on the crank. did you have to remove it to install the lower pulley?

 

older 5.7's the balancer could go bad and it would spin on itself I'm looking at this pic from kysilverados pictoral looks like it's possible in these LSX balancers
as well pully spinning on the hub. you mentioned it got quieter with WD40
(WD40 WTF over?) kysilverado? I got the lowly sierra it didn't come with any KY