The Ford Barn

jimmyz80 · 06-06-2018, 09:32 PM

My '31 has been making an odd noise when the engine is running, and I'm not entirely sure where it's coming from. My next step is to remove the fan belt and start turning things by hand to see what they feel/sound like. But I figured I'd post a sample here first, to see if it sounds familiar to anyone.

It's sort of a mid-pitch whistling sound, that doesn't ever change pitch regardless of engine speed. It mostly occurs when the engine is idling, and a little bump of the throttle makes it go away. I have however had a few times where even at a high idle speed, the same noise shows up.

Anyway, here's a short youtube clip of the noise. I'd advice turning your volume down before you click, since it's mega annoying.

https://youtu.be/7_P8VjZZq8c

Thanks!

Josh Randall · 06-06-2018, 10:35 PM

I had a 53 Ford pickup that sounded similar.
It turned out to be a small vacuum leak.

Randall

PC/SR · 06-06-2018, 11:03 PM

I would go with vacuum. Good news is there are only a few places in an A for a vacuum leak. I would first check torque/tightness of the manifold and carb. Thats easy. Then try it without the fan belt.

Benson · 06-06-2018, 11:23 PM

I have heard a similar sound when "someone" failed to install the Venturi after working on the carburetor.

Another time I installed carb in darkness and the mounting bolt on the rear did not go through the hole in gasket because the gasket had turned toward engine so there was large vacuum leak.

burner31 · 06-07-2018, 06:56 AM

Yep, take off the fan belt and start her up, that would be my first check, move on from there,

BILL WILLIAMSON · 06-07-2018, 09:51 PM

Sponsored Links (Register now to hide all advertisements)

Half a cup of brake fluid, in the radiator, will stop a water pump seal squeak.
Old Chrysler trick.
Bill W.

06-06-2018, 09:32 PM	#1
jimmyz80 Junior Member Join Date: Jul 2011 Posts: 21	Does this noise sound familiar to anyone? My '31 has been making an odd noise when the engine is running, and I'm not entirely sure where it's coming from. My next step is to remove the fan belt and start turning things by hand to see what they feel/sound like. But I figured I'd post a sample here first, to see if it sounds familiar to anyone. It's sort of a mid-pitch whistling sound, that doesn't ever change pitch regardless of engine speed. It mostly occurs when the engine is idling, and a little bump of the throttle makes it go away. I have however had a few times where even at a high idle speed, the same noise shows up. Anyway, here's a short youtube clip of the noise. I'd advice turning your volume down before you click, since it's mega annoying. https://youtu.be/7_P8VjZZq8c Thanks!

06-06-2018, 10:35 PM	#2
Josh Randall Junior Member Join Date: Jan 2018 Location: Alabama Posts: 28	Re: Does this noise sound familiar to anyone? I had a 53 Ford pickup that sounded similar. It turned out to be a small vacuum leak. Randall

06-06-2018, 11:03 PM	#3
PC/SR Senior Member Join Date: May 2010 Location: Santa Rosa, CA Posts: 1,279	Re: Does this noise sound familiar to anyone? I would go with vacuum. Good news is there are only a few places in an A for a vacuum leak. I would first check torque/tightness of the manifold and carb. Thats easy. Then try it without the fan belt.

06-06-2018, 11:23 PM	#4
Benson Senior Member Join Date: May 2010 Posts: 2,597	Re: Does this noise sound familiar to anyone? I have heard a similar sound when "someone" failed to install the Venturi after working on the carburetor. Another time I installed carb in darkness and the mounting bolt on the rear did not go through the hole in gasket because the gasket had turned toward engine so there was large vacuum leak. Last edited by Benson; 06-07-2018 at 11:20 AM.

06-07-2018, 06:56 AM	#5
burner31 Senior Member Join Date: Dec 2014 Location: Shawnee, Ok Posts: 3,471	Re: Does this noise sound familiar to anyone? Yep, take off the fan belt and start her up, that would be my first check, move on from there, __________________ Keith Shawnee OK '31 SW 160-B

06-07-2018, 09:51 PM	#6
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Does this noise sound familiar to anyone? Sponsored Links (Register now to hide all advertisements) Half a cup of brake fluid, in the radiator, will stop a water pump seal squeak. Old Chrysler trick. Bill W. __________________ "THE ASSISTANT GURU OF STUFF"