2007 5.7L squeal on start up - sometimes
This issue is what lead me to this forum. I have been chasing sounds coming from my engine bay. First it started as a bearing going out kind of noise. So it lead me to believe it was the tensioner bearing going out. So I replaced it with a Rock Auto tensioner, Dayco, and that sound was resolved. But a new squealing sound started. It is only sometimes, and varies on the amount of time it last and loudness. Usually if you goose the gas it will stop. When i changed out the tensioner, i changed out the belt as well with a Dayco replacement. From the looks of it, the belt seemed to be slipping. So I changed to a Gates. Same sound was happening. So i researched and found that folks like the Goodyear Belt. So i ordered one of those. Still had the issue. So i pulled off the RockAuto Dayco tensioner and replaced it with a Toyota OEM tensioner. I am still having the issue.
So my question is, what else could it be? at this point i am thinking it cant be the tensioner or the belt, it has to be something else. Any ideas? Common problems i am missing?
Thanks for the help.