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Squealing noise after 70km/hr #740014
September 02nd 2018 3:43 pm
September 02nd 2018 3:43 pm
Joined: Sep 2018
Posts: 6
BC - British Columbia
B
BabyG Offline OP
stranger
BabyG  Offline OP
stranger
B
Joined: Sep 2018
Posts: 6
BC - British Columbia
Hi all
I have this horrible squealing noise after 70km/hr, all my belts have been replaced (3 months ago) and I'm struggling to find the source of the noise.

any thoughts?

Re: Squealing noise after 70km/hr [Re: BabyG] #740015
September 02nd 2018 4:04 pm
September 02nd 2018 4:04 pm
Joined: Jul 2018
Posts: 75
Raleigh, NC
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bubbafat Offline
journeyman
bubbafat  Offline
journeyman
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Joined: Jul 2018
Posts: 75
Raleigh, NC
Tensioner or pulley bearing would be where I'd look next.

Re: Squealing noise after 70km/hr [Re: BabyG] #740017
September 02nd 2018 5:11 pm
September 02nd 2018 5:11 pm
Joined: Jun 2010
Posts: 13,786
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 13,786
Van Diego California
Yep you have a bearing going out....


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Squealing noise after 70km/hr [Re: BabyG] #740019
September 02nd 2018 6:23 pm
September 02nd 2018 6:23 pm
Joined: Nov 2013
Posts: 1,015
West Texas
W
Wedgy Offline
old hand
Wedgy  Offline
old hand
W
Joined: Nov 2013
Posts: 1,015
West Texas
Hi BabyG, welcome to the site!

Yeah, I hate it when that happens. On my 3rd rebiult alternator here in West Texas. AC clutch bearing can go bad too.

It's when the squealing noise turns into the box of rocks noise. 300 miles from home. That's exciting!

Re: Squealing noise after 70km/hr [Re: BabyG] #740030
September 03rd 2018 8:08 am
September 03rd 2018 8:08 am
Joined: Nov 2013
Posts: 1,015
West Texas
W
Wedgy Offline
old hand
Wedgy  Offline
old hand
W
Joined: Nov 2013
Posts: 1,015
West Texas
BabyG,

More thoughts.

So if you don't have a single Serpentine belt system, there will be no tensioner or idler bearing. A seperate belt for each driven component, as per your post.

As you know, not easy to diagnose. Check for any suspect noise. Be careful troubleshooting underhood with the engine running. Carefully examine all belt driven accessories with the engine running, and off. Check all belt tension. Maybe an incorrect belt. Cycle the AC on and off with the engine running to check the AC clutch bearing. A bad one is very noticable.

Been there recently, 300 miles form home. Drove it back towards home, (into my free AAA 200 mile tow range,) from Santa Rosa to Clovis, until the box of rocks noise became too alarming. Good times.

A seized V belt driven alternator bearing will sound exactly as you described. Had that happen too. At idle the component was frozen, but the belt still turned, making increasing squealing noise with RPM.

Drove it 100 miles home. 327 SBC. Single V belt driving water pump and alternator. Boy was that an adventure.

Hope you have success with this mission! HooRah!

Last edited by Wedgy; September 03rd 2018 8:14 am.
Re: Squealing noise after 70km/hr [Re: BabyG] #740031
September 03rd 2018 9:25 am
September 03rd 2018 9:25 am
Joined: Sep 2018
Posts: 6
BC - British Columbia
B
BabyG Offline OP
stranger
BabyG  Offline OP
stranger
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Joined: Sep 2018
Posts: 6
BC - British Columbia
thanks for all the responses....
I know what I will be doing for the next few nights.



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