JoshS550

hello. It is starting to get a little colder here in Texas and I have recently noticed a squeaking noise. I replaced 2 pulleys and the camshaft magnets but still getting a noise. A new noise has recently came along and I took a video. Please leave some feed back to what you may think it is so I can do some research. Thanks.

https://vimeo.com/195250668

DaveW68

Your car appears to have either the jet engine or the table saw option.

Paulmurphy

Spray the serpent belt, if noise changes or goes away briefly that's the prob
or remove belt altogether then start engine and observe any changes

gsholz

Does the noise change with RPMs? If yes, i'd double check all the idler / tensioner pulley bearings. Sounds like you have replaced some already. Removing the belt as suggested by Paul above will also eliminate any idler/accessory issues.

If the sound does not change with RPMs, it might be the secondary cold air pump. The pump should shut off after a couple of minutes though.

Do you have any CELs? Some 2007 550 engines had some timing chain idler wear issues.

shadenfroh

It's safer to remove the belt. Just don't spray it with WD-40. I know it says it's safe to use on rubber, but it's petroleum based so I'd stay away from it.

litespeedone

Did you ever figure out what the noise was?