2nd Gen Non-Engine/Transmission Squeal

[RLeighton]

As with most first timers, I want to extend my appreciation to all those who post valuable information on this site.



Looking for advice on my stock 2001 HO.



Because I'm new to diesels every noise that is out of the ordinary makes me worry. Recently there has been a high pitched squealing noise that I hear within 1/2 a mile after leaving a toll booth. It doesn't do it all the time, and has only happened twice so far. Sounds like squeaking brakes. My truck has just over 60,000 miles and I have only owned it for the last 10,000 miles. As I said above it is completely stock and I am religious when it comes to normal maintenance. Because I'm worried about the lift pump I checked the fuel pressure at idle and everything is okay. So I hope I've given you enough information to go on. I did read a post about a TSB for a coolant line, but my greatest concern is the Turbo. Could this noise be coming from there, how do I inspect it, is it under warranty still?



Thank you in advance and Happy Holidays to All!!

 

[Alan Reagan]

I wouldn't think it would be the turbo but you can check it by removing the intake line from the air filter where it connects to the turbo. GENTLY check for side to side movement. Also, look to see if the turbo has been scraping the housing because of excessive end play in the bearings.



Occasionally on cold damp mornings my rear brakes will squeal a little when stopping and I can hear them when I start off.



I have corrected the rear brake squeal in the past by removing the drums and cleaning then inside with brake cleaner and cleaning the shoes with brake cleaner and a light buffing of steel wool.



Check the water pump and make sure it's not weeping. Looking down at the water pump from the front of the truck, you will find a hole on the right side of the pump (toward the center of the engine). Make sure it's not weeping coolant. If it is, it's time to replace the pump.



Also, make sure the belt is wearing evenly across it's width. Wear on one side would indicate the idler pulley bearings may have excessive play causing the pulley to "lean".

 

[Walker]

My squeal was a worn rear U joint.

 

[JohnE]

Serpentine belt?