Grinding noise

[iboughtatahoe23]

Removed spacer and just Kept the new pully. Y not

 

[iboughtatahoe23]

You need to switch it on or off when you hear the noise to see if the noise changes/goes away.
No change, it's probably something else.

Second easiest thing is to take the accessory belt off. That would eliminate idler pulleys, alternator, water pump, power steering as possible culprits.

Maybe try moving your phone to different areas and record away. Get some good tape..

i thought changing the idler pulley fixed it. But it’s back

 

[iboughtatahoe23]

Guess I’m not sure what else. I was gonna check the flexplate, or I know someone mentioned fuel rails and such etc, I have been trying different fuels. Comparing e85 and 91. Idk if that affects it or makes it worse. I spun the pulleys that spun freely and they didn’t make any noise. But like I said I still changed the idler pulley.

I suppose if it gets worse I’ll take it in. Last time they couldn’t hear it. I even showed them a video of it loud and clear and they still said to see if it gets worse.

 

[iboughtatahoe23]

So if it’s speed dependent…. And seems to only happen around 25 mph and stops as soon as I shift around that speed, I am really afraid it’s transmission related or torque converter related.

But if the issue has persisted this long without affecting driveability in any way really. Than how serious is it.

 

[iboughtatahoe23]

Found an article where someone has the same issue as me in a Lincoln mkz

Only article I’ve found where someone has the same issue as me

 

[iboughtatahoe23]

Found an article where someone has the same issue as me in a Lincoln mkz

Only article I’ve found where someone has the same issue as me

This mentions the intake manifold stud being the culprit. I have not ever dabbled with an intake manifold.

I do however have a missing stud on my exhaust manifold, I wonder if the leak can cause a rattle at low speeds somewhere ?

 

[iboughtatahoe23]

Still say is a shield of some sort.

Inspected some shields. Can’t find a loose one or any thing making that noise.

 

[iboughtatahoe23]

Update under the car inspecting.

 

[iboughtatahoe23]

Anyone know if I can see the starter touching the flex plate through the inspection port? Something did seem really close.
Doesn’t appear to be scratching anything in the photo.

Also hear the intake manifold can rattle?

 

[wjburken]

Also hear the intake manifold can rattle?

Your intake manifold is plastic and on top of your motor. I have never heard of one rattling. If it was, you would have a myriad of codes.

The stamped heat shields on the exhaust manifolds can rattle as well.

Anyone know if I can see the starter touching the flex plate through the inspection port?

Nope. Not seeing any signs of wear from the starter in that photo.