Shrieking howl from radiator area in cold weather


Information and questions on GL1200 Goldwings (1984-1987)
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gemotra
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Shrieking howl from radiator area in cold weather

Postby gemotra » Mon Feb 03, 2014 9:53 pm



At temperatures below about 40F, I routinely get a high-pitched shriek that kicks in precisely at 55 mph and does not abate until speed drops to 35 mph, when it stops abruptly with a small "clump" as if a door were closing. This is strictly a cold weather phenomenon and is a function of road speed, not engine speed. The sound seems to emanate from the area of the radiator. Any ideas? Could it somehow be the cooling fan?



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virgilmobile
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Re: Shrieking howl from radiator area in cold weather

Postby virgilmobile » Mon Feb 03, 2014 10:21 pm

Well the fan does free wheel so its possible its dried out bearings but first disconnect the spedo cable at the front wheel and test again.

gemotra
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Re: Shrieking howl from radiator area in cold weather

Postby gemotra » Mon Feb 03, 2014 10:50 pm

I hadn't considered the speedometer cable; thanks. Regarding the fan, it operates appropriately in warm weather without undue noise.

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WingAdmin
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Re: Shrieking howl from radiator area in cold weather

Postby WingAdmin » Tue Feb 04, 2014 7:48 am

gemotra wrote:I hadn't considered the speedometer cable; thanks. Regarding the fan, it operates appropriately in warm weather without undue noise.


Speedometer drive, cable and/or speedometer would be my first guess, but it could be the fan: When the fan is operating, it is trying to push itself forward, as it blasts air backward. When it is not operating and is freewheeling, it is being pushed backward, loading the bearings the opposite way, so it is possible that it is the fan...but my money is on the speedometer cable. :)

gemotra
Posts: 14
Joined: Fri Apr 08, 2011 9:16 pm
Location: United States
Motorcycle: 1986 GL1200I Interstate

Re: Shrieking howl from radiator area in cold weather

Postby gemotra » Tue Feb 04, 2014 1:52 pm

Appreciate the confirmation as to the speedometer cable, particularly since it'll be easy to rule out or verify. I personally suspect the fan because the noise is more of a whistling, rushing air sound rather than the sort of mechanical whirring one associates with the speedometer mechanism... but either way, I can't explain why the noise is temperature-dependent; never occurring above 40 or so degrees.

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WingAdmin
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Re: Shrieking howl from radiator area in cold weather

Postby WingAdmin » Tue Feb 04, 2014 4:15 pm

gemotra wrote:Appreciate the confirmation as to the speedometer cable, particularly since it'll be easy to rule out or verify. I personally suspect the fan because the noise is more of a whistling, rushing air sound rather than the sort of mechanical whirring one associates with the speedometer mechanism... but either way, I can't explain why the noise is temperature-dependent; never occurring above 40 or so degrees.


That's a pretty common failure mode for rotating items dependent on bearings or lubricated surfaces for their smooth movement. Things get stiff and complain when it's cold. Me included. :)




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