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Old 08-12-2019, 12:47 PM   #1
Mini-Skoolie
 
Join Date: Jun 2019
Location: Troy, Montana
Posts: 13
Year: 1988
Coachwork: Bluebird
Chassis: international s1800
Engine: dt466
Rated Cap: 10 windows
screaming banshee under the hood

So I took the bus out for a quick little joyride, and I thought I heard a funny noise (my hearing is pretty much shot), but pretty quick it turned into a banshee screaming like a distressed ape, and then, just as quick it faded and went away. I was only about 15 minutes getting back to the barn, with no more noise. It struck me that the turbocharger is the only thing turning fast enough to make that high pitch scream. Can a turbo scream like that for about 90 seconds, then quiet down again?
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Old 08-12-2019, 02:15 PM   #2
Mini-Skoolie
 
Join Date: Aug 2019
Location: Las cruces nm
Posts: 12
Year: 97
Coachwork: Carpenter
Chassis: International
Engine: T444e
Rated Cap: 25,500
Maybe a belt
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Old 08-12-2019, 02:19 PM   #3
Mini-Skoolie
 
Join Date: Aug 2019
Location: Las cruces nm
Posts: 12
Year: 97
Coachwork: Carpenter
Chassis: International
Engine: T444e
Rated Cap: 25,500
Or pulley including idler pulleys
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Old 08-12-2019, 05:50 PM   #4
Bus Nut
 
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Join Date: Oct 2017
Location: Virginia
Posts: 939
Year: 1971
Coachwork: Wayne
Chassis: International Loadstar 1700
Engine: 345 international V-8
Could be cooling fan. If engine driven it could be niosey itself,although the way you describe it sounds like fan clutch or more likely belts slipping when it comes on, then when it goes back off all is well again. Anyway this is where I would start looking.
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Old 08-12-2019, 06:19 PM   #5
Bus Geek
 
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Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 7,150
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
One of mine did that. Squeal, SCREAM, Bang, Quiet. It was the brake compressor siezing up and breaking the belt. Ran 12 miles back with no oil pressure.
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