Loud Whistle From 94 Carburetor

[Tikker]

I've got a nice rebuilt 94 carb on my '52 Customline, borrowed from my brother till I rebuild mine.
Had it on before and it worked great, gave it back to him to try and determine some problems he was having on his '41 PU.
Now I've got it back and it has the loudest whistle you can imagine.
I'm sure it's a vacuum issue, it's not the line to the wiper motor, all bolts and screws are tight. I've actually had it stop whistling at initial start-up, but it quickly goes into whistle mode.
My brother mentioned the possibility of the power valve.
I can't leave it like it is, any suggestions for a solution?

[ken ct]

It could be the spring loaded little disc on the choke flapper is not opening when choked fully to let in some air??? ken ct. PV will not make any noise that i know of even if bad. Does it whistle when the choke plate is full open ??

[Gary in La.]

Could possibly be warped base of body where it mates to the carb base. I've had vacuum leaks there before on a 94 model 59 carb. Creates a very loud whistle.

[OhioRick]

Had this just this year and
I Traced it with a stethoscope to a hole in my cast base.

[41ford1]

Originally Posted by Gary in La.

Could possibly be warped base of body where it mates to the carb base. I've had vacuum leaks there before on a 94 model 59 carb. Creates a very loud whistle.

Bingo!!
Both the bottom of the bowl body and the mating surface of the throttle body must be flat. File or machine as required. Thicker gaskets there sometimes cure the whistle.

[Tikker]

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Originally Posted by ken ct

It could be the spring loaded little disc on the choke flapper is not opening when choked fully to let in some air??? ken ct. PV will not make any noise that i know of even if bad. Does it whistle when the choke plate is full open ??

Choke full open.....

[Tikker]

Great information, suspect base gasket as it's not in pristine condition,
That's an easy solution to try initially.
I'll update.

[Gary in La.]

Suggest while you have it apart to take a piece of glass and tape a sandpaper sheet to it. Slide the 2 mating surfaces over it until have a uniform sealing surface. Sometimes using just a new gasket will still not seal good enough.

[Ralph Moore]

I would go with base gasket as well, a buddy's rpu was making the same noise with strombergs. We traced it to the carb base by pulling the windshield and I climbed over the engine while he drove, the sound was loudest going down the road about 35 mph.

[ford38v8]

Ralph, I guess no speed bumps in Alaska, or your buddy would have heard some pretty substantial thumps and bumps!

[Lawson Cox]

Originally Posted by ralph moore

i would go with base gasket as well, a buddy's rpu was making the same noise with strombergs. We traced it to the carb base by pulling the windshield and i climbed over the engine while he drove, the sound was loudest going down the road about 35 mph.

omg

[Mike in AZ]

lucky no moosie stepped out on road....yikes....the things we do, eh??....done the old ride-the-fender-and-dribble-gas-down-the-carb-while-moving thing back when....and still alive to tell about it...lol....Mike

[Bluebell]

Ralph, I'd have thought that whistle would have frozen solid, before it got out, at the Pole.

[Ralph Moore]

It was definitely not the proper way to do it. Don't try this at home kids. But our roads are not that crowded and it worked!

[32phil]

Had the same problem years ago. it was the hidden screw that faces up when the carb is in place. I found it by rocking the top of the carb while the engine was running. Tightened the screw and the whistle stopped.

[ken ct]

That screw up from the bottom is really not long enough,use a longer one cut down to just short of the bottom of the hole.Works just fine. ken ct.

[Tikker]

Problem solved.
Removed the carb and didn't realize there were remnants of an old gasket on the manifold. Wire brushed that with a small wire wheel in my drill motor till clean (was surprised to discover the manifold mating surface was textured like a cheese grader). Installed a new base gasket.........no more whistle.
And nobody needed to ride under the hood.
Thanks for all the input.

[Ralph Moore]

Well that's no fun

[TStiles]

Darn. I'm west of you over on the peninsula and was hoping to run over for that thrill ride...

[dwick01]

Some people pay good money to hear a whistle.........