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Whistling Norge

Bill Hagan

Bill Hagan

GT Reference
GT di Razza Pura
Joined
Oct 29, 2008
Messages
1,710
Location
Above Pott's Camp along Braddock's route, Virginia
In another thread about servicing my Norge — https://www.guzzitech.com/forums/threads/lament-of-an-untalented-but-happy-wrench.15887/ — I mentioned a low-pitched “whistle.”

It's still there. :blush:

Here are two brief vids:

https://www.dropbox.com/s/or816s3skumz5js/2016-04-04 13.08.04.mp4?dl=0

https://www.dropbox.com/s/smzhp104dw4rehn/2016-04-04 13.08.30.mp4?dl=0

Anyone care to speculate (or say with certainty! :party:) what that (maddening, and at traffic lights, a bit embarrassing :() sound might be?

Thanks.

Bill
 
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My guess is you have a hose off or the inlets hoses not all the way on. It seems to be sucking air somewhere.
 
Open your gas cap and see if the noise goes away. Sounds like sucking air. Plugged vent or bad check valve in the vent line. Just my guess.
 
Bill, "whistle while you work" taken to the extreme? Just ignore me, I will eventually go away, might take a few years though...
 
I must admit I listened to the vid, and buggered if I can hear the whistle ( maybe too many k's without earplugs) . Anyway in the past 155,000k's I've had two whistles from my sport, being alternator belt sliping. & exhaust gasket leaking at head which was a result of studs being stripped .( nothing a hellicoil couldn't fix). Might be worth investigating.
 
Grazie to all -- well, except mebbe Tony! :happy: -- for the suggestions.

First noticed this strange sound on way back from national rally in New Hampshire last summer. Interesting, and quite possibly related -- a dealer up there said I had my emissions hoses improperly connected and that they corrected that.

Not so sure now. The dealer was very helpful in other ways to me back on the road, so I am not complaining, just noting. Interesting, too, that my tranny "fuel line" (WHY do they call it that in the parts list?) became a foot or so longer and was hooked into the emissions system! :rolleyes:

Anyway, I changed that out and think I have those hoses connected correctly now. But the sound is still there.

I also did not mention in my "lament" (https://www.guzzitech.com/forums/threads/lament-of-an-untalented-but-happy-wrench.15887/) that I had R&R'd the alternator belt and swapped out the header-pipe studs, along with new gaskets. At this point, Tonym is thinking, "Yup; thought so." And, could be.

That said, I am pretty sure that the belt was installed properly WRT tension and I was especially careful in removing, putting in new, and reinstalling header pipes, studs, and gaskets. Still ... could be.

I will look into the possibility that a hose is not fully seated. I did try opening the gas-cap while running, but no change.

My present plan is to lift the tank enough to pull the two emission hoses at their source, then start 'er up. If the whistle is gone, that will have narrowed the search. If not, maybe I'll just learn how to whistle in harmony. :giggle:

Thanks, again, for the ideas. I'll post any victory.

Bill
 
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Listening to it again, the whistles raise and lowers with the revs of the engine. Could be the belt, but in my experience, that usually sounds like a squeal (belt) or bells (bearing/tensioner).

Disconnect the vaccum lines from the 2 Throttle bodies that go to the canister. These are the lines that draw the air from the fuel vapor canister into the throttle bodies to burn. I am guessing something is not hooked up right and you are sucking air back through the check valve. That is the same sound you hear when the bike sits in hot weather and the tank vents through the valve.

If the sounds goes away, then it is time to get rid of the canister and just direct vent. You can just join the two TB together, or plug each one separately to get you going but recommend disconnecting the canister and direct vent to atmosphere.
 
Thanks again.

When I get home from Atlanta next week, I'll test as recommended, but suspect doing the total "evisceration" is in the near future. too.

The #$%^& oil-pressure sensor remains a maddening issue, but nothing duct tape -- over the red dash light! ;) -- can't fix for the short run, anyway. :clap:

Bill
 
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