Loud squealing noise a minute after start up

140,000 MILES
Avatar
MI30189
  • MEMBER
  • 50 POSTS
When I start the van up, about a minute after starting it starts to squeal real loud. How can I pin point if it is the idler bearing, or the power steering pump or the alternator?
Thank you,
Mark
Nov 21, 2018 at 3:21 AM
Avatar
BMDOUBLE
  • ✓Experienced Mechanic
  • 1,139 POSTS
The safest way, even though it is the most intrusive, is to start by removing the drive belt from the components you suspect and rotate the pulleys by hand. You can also take a stethoscope and carefully (staying away from moving parts) feel and hear for excess vibrations at the rear of each component. Have a look at the power steering fluid with a light to check for sparkly bits also.
Nov 21, 2018 at 3:41 AM
Avatar
MI30189
  • MEMBER
  • 50 POSTS
Hi BMDouble,

Thank you for your quick input I will give it a look at it after the holiday.
Thank you,
Maek
Nov 22, 2018 at 2:31 AM
Avatar
STEVE W.
  • ✓Experienced Mechanic
  • 15,399 POSTS
Another quick way is to mist a bit of plain water onto the belt in front of each suspected item so the belt carries the water over it, if the noise changes the instant you spray the water on, look at that item. Also, when was the last time the belt itself was replaced?
Nov 23, 2018 at 6:29 AM
Avatar
MI30189
  • MEMBER
  • 50 POSTS
Hi Steve! I tried what u said to try with the water first, I found it to be the power steering pump. I changed out the pump and a new belt, now all is quiet.
Thank you,
Mark
Nov 23, 2018 at 6:02 PM
Avatar
STEVE W.
  • ✓Experienced Mechanic
  • 15,399 POSTS
Mark, Great to hear that you found the problem. Thank you for using 2CarPros.com Please return anytime with your automotive questions.
Nov 23, 2018 at 9:47 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle