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Carburator whistling?
https://www.slantsix.org/forum/viewtopic.php?t=29731		 Page 1 of 2
Author:  zerglin87 [ Wed Jun 25, 2008 7:04 pm ]
Post subject:  Carburator whistling?
i have carb 64-3114 and i just installed it on my dart and when i start it up...it starts whistling..any ideas as to what tis is? maybe a vacuum leak?
Author:  SlantSixDan [ Wed Jun 25, 2008 7:19 pm ]
Post subject: 
Probably. "Remanufactured" carburetors are notoriously problematic.
Author:  zerglin87 [ Fri Jun 27, 2008 12:10 am ]
Post subject: 
Do people even test these cargbs before they start to sell them?
Author:  Charrlie_S [ Fri Jun 27, 2008 4:31 am ]
Post subject: 
Quote:
Do people even test these cargbs before they start to sell them?
If they did that, they would have such a high reject rate, there would be nothing to sell.
Author:  MoparBrit [ Fri Jun 27, 2008 5:45 am ]
Post subject: 
I'm assuming that the carb number is for a 1920 type Holley carb. Has the big fuel bowl towards the front.

The whistling is a vacuum leak. Look at the fuel bowl in the front, where it mates to the carb, just to the right, on the top is a cap about 3/4 to an 1" in diametre that is held on with three screws. My guess would be that most likely this is where your whistling is from. Sometimes the screws are just not tight, but sometimes the cap is warped.

Check that and see if I get the prize for guessing right where it is. :lol:

If it is, then I will admit I cheated a bit. Had the same whistling sound when I got this car. Found the cap was warped. Luckily was able to find another from another member of the Mopar community and fixed the issue.

Cheers
Author:  Aggressive Ted [ Fri Jun 27, 2008 7:36 am ]
Post subject: 
That's pretty common having those three screws loose. You can buy some star washers or locks washers to help the bolts from loosening over time. Mine had none.....just the screws.....my cap was ok, perfectly flat, just loose.
It gets full vacuum 18" to 25" and operates the power valve.
Author:  Pat Dawson [ Fri Jun 27, 2008 8:56 am ]
Post subject: 
Could it be worn throttle plate hinge points?

Do you recognize the tune? .......... Sorry, it's Friday, it's hot in DC, my economy is in the toilet, and I wanna go home.
Author:  Doc [ Fri Jun 27, 2008 9:46 am ]
Post subject: 
Quote:

Do you recognize the tune? .......... Sorry, it's Friday, it's hot in DC, the economy is in the toilet, and I wanna go home.
Sounds like "whistle while you work" to me... :lol: :roll:
(I could not resist)
DD
Author:  zerglin87 [ Fri Jun 27, 2008 1:46 pm ]
Post subject: 
It seems to whistle whenever im at idle, but when i start to acellerate the whistling will disappear, its very weird for me.
Author:  vynn3 [ Fri Jun 27, 2008 2:21 pm ]
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Maybe it doesn't know the words... :lol:
Author:  Aggressive Ted [ Fri Jun 27, 2008 2:49 pm ]
Post subject: 
Quote:
It seems to whistle whenever im at idle, but when i start to acellerate the whistling will disappear, its very weird for me.
That's is not weird at all, when you open the throttle plate the vacuum drops.
Hook up a vacuum gage inside and watch what happens. That will also help your driving style too! I wouldn't be with out it.......

Tighten up the nuts, (holding the carb down) and bolts (holding the accelertor pump) with lock washers or star washers so they don't loosen up. :D
Author:  zerglin87 [ Sat Jun 28, 2008 2:29 am ]
Post subject: 
okay i decided to test the vecuums by pulling off each hose and i noticed that the one controlling the ahh...choke...sorta like a vacuum operated thingy..for the choke..and the pitch of the whistling grew deeper, but when i put my thumb on the nipple the whistling goes back to normal, loose vacuum nipple?

((The vaccuum operated choke helps open the choke i think..))
Author:  MilwaukeeTech [ Sat Jun 28, 2008 10:55 am ]
Post subject: 
Hi all... first time posting, so be gentle, eh?

Haven't had a /6 in over 20 years, but had a yard full of the critters back-in-the-day. One, a '66 Dart 270, developed the annoying carb whistle, the source of which was damn elusive for several days.

Eventually found that where the top cover (bowl/air horn cover) bolts to the carb body was the culprit - the top had warped slightly and sucked the gasket partially into the throat allowing a tiny gap between the top and bottom. Air rushing into the carb via this gap caused the whistle.

Lapping the mating surfaces and using 'copper coat' on the gasket prior to assembly rectified the musical inclinations of the carb.

Been reading this forum a long time. God, the memories it brings up.
Maybe some day...
Author:  SlantSixDan [ Sat Jun 28, 2008 11:17 am ]
Post subject: 
Welcome on the board, MilwaukeeTech. What you're describing sounds like you had a Carter BBS carburetor; the top-to-middle casting junction on these and the BBDs can indeed warp over the decades. A good solution is to use a stack of two (or even three) of the correct gasket at this junction.
Author:  MilwaukeeTech [ Sat Jun 28, 2008 11:37 am ]
Post subject: 
Yes, it was a Carter. I switched back and forth with the Holley more times than I care to remember on those engines... kept suffering from the 'grass is always greener' syndrome, I suppose. That is, until I went with dual sidedraft Webbers on the '64 GT. From that point on, the other side didn't even have any grass.

Now, 25 years later, I've sort-of got my eye on a '64 GT for sale locally. And somewhere I've still got the templates for the manifolds. But I haven't seen headers like the ones I had in ages.
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