Screeching sound 03' 6.0

[Tungsten,]

With the cold it makes this noise.When it was warmer like 0 it went away after it warmed up.But with -15 it stays.https://youtu.be/WY2CK89eFH8

water pump? seams louder on passenger side.

[1886]

Remove belt and turn all the pulleys. You will most likely find one that is stiffer. Idler and tension pulley would be my guess.

[Tungsten,]

hmmm just replaced both idler pulleys,Suppose one is bad? Noise was louder on passenger side so perhaps the a/c idler.Ill take that belt off and see.

[1886]

Check your uplifter pipe on the exhaust. I have an 08 ford 6.4 that broke one and makes a similar noise.

[Tungsten,]

Originally Posted by 1886

Check your uplifter pipe on the exhaust. I have an 08 ford 6.4 that broke one and makes a similar noise.

What the heck is an up lifter pipe?

[1886]

Diesel engines have it. Runs to the turbo. Re watched the video and looks like yours is maybe a gas job? Did you Check your alternator as well?

[CBintheNorth]

Power steering pump is what it was on my '02.
Exactly like what you described.
Check it and change it before it craters.
I would check for sweaty hoses and do them at the same time.

[Tungsten,]

Originally Posted by 1886

Diesel engines have it. Runs to the turbo. Re watched the video and looks like yours is maybe a gas job? Did you Check your alternator as well?

Gas,with an exhaust leak.GM 6.0 I should have put in title.thx

[Tungsten,]

So took the a/c belt off had to pull into garage for heat.Its back outside now.Let it get cold and see.Was no noise backing out.

[Tungsten,]

Originally Posted by CBintheNorth

Power steering pump is what it was on my '02.
Exactly like what you described.
Check it and change it before it craters.
I would check for sweaty hoses and do them at the same time.

Noise is on other side,kinda can tell in video.
I hope your wrong,not something I want to change.

[Tungsten,]

Originally Posted by Tungsten,

So took the a/c belt off had to pull into garage for heat.Its back outside now.Let it get cold and see.Was no noise backing out.

Started it back up and no noise,frig only 1 month old that tension pulley.
Doesnt like the cold I guess,gave it a spray and loosened the bolt a hair.Will see I guess.

[amosfella]

Do you have a mechanic's stethoscope? If so, you can try to see where the noise is from.

Does your ac compressor have a clutch? If so, push against the clutch slightly with a tool to see if the noise changes. That noise sounds like something is just barely rubbing.

I've had several idler pulleys fail right out of the box (bad batch maybe). Now, unless the pulley is wrecked, I pop out the snap ring, press out he bearings, and get new bearings from motion. Put back together.

Can you see if the belt is vibrating in any are more than others?

[Tungsten,]

Originally Posted by amosfella

Do you have a mechanic's stethoscope? If so, you can try to see where the noise is from.

Does your ac compressor have a clutch? If so, push against the clutch slightly with a tool to see if the noise changes. That noise sounds like something is just barely rubbing.

I've had several idler pulleys fail right out of the box (bad batch maybe). Now, unless the pulley is wrecked, I pop out the snap ring, press out he bearings, and get new bearings from motion. Put back together.

Can you see if the belt is vibrating in any are more than others?

Thx its the tension pulley,after a quick disassemble ,some oil the noise is gone.I assume it will be back though.Ill get a new one and new belts this time.