The Ford Barn

luchoster · 10-24-2016, 11:21 PM

Hello everyone!

I finally got my truck starting as I wanted. Thanks to the help of one of the forum local users (he did all the work).

Anyway, I went for a ride and now I hear this Knocking sound when I accelerate.

Video below so you can hear it too

https://goo.gl/photos/McMEfGZfD5DKWj1E6

Please help, I'm not sure what that could be or how bad is it.

Thanks!

H. L. Chauvin · 10-24-2016, 11:39 PM

Mechanic's stethoscope from Amazon.com might be a good start to try to pinpoint the source of this sound.

Joy riding with a knock is never a good idea.

J Franklin · 10-25-2016, 12:31 AM

Find it before it kills your project. I wouldn't start it again until the pan was dropped to check the bearings and rod bushings.

Big hammer · 10-25-2016, 05:18 AM

I listened to it, and that sounds bad! No more joy riding until you find out why.

RUNNERBUN · 10-25-2016, 06:05 AM

Sad to say that it certainly sounds like you have a big end bearing that has failed. Pull the pan and check. I suspect you will find there will be lots of broken babbitt in dipper wells. As Franklin and big hammer said, don't drive it until you find the problem. You might consider just running it at idle and short out one spark plug at a time. If indeed you have a failed babbitt on one rod the knock will almost disappear when the bad rod is shorted out.

Safewiz · 10-25-2016, 07:16 AM

Sponsored Links (Register now to hide all advertisements)

Agree with above. Drop the pan, check for any material in pan, then check rods and mains. Good luck and let us know what you find.

James Rogers · 10-25-2016, 07:26 AM

Center main or a rod. Looks like it is time for some engine work.

George Miller · 10-25-2016, 07:29 AM

As James said center main.

BILL WILLIAMSON · 10-25-2016, 07:38 AM

Shorting out # 2 & # 3, at the same time, will SILENCE a center main knock!
Bill W.

luchoster · 10-25-2016, 09:28 AM

Thank you for the responses. I will have to start working on that then. I'll keep you posted

Sent from my ZTE A2017U using Tapatalk

V4F · 10-25-2016, 09:37 AM

center main

Tom Wesenberg · 10-25-2016, 10:41 AM

I couldn't get anything to load to hear the sound, but I sure know what the center main with no babbit sounds like because that was the case when I bought my 29 Tudor. It sounded so nice at the swap meet when I heard the engine idle, but when I got it home and drove it over about 15 MPH it sounds like a broken down threshing machine.

Time to pull the engine and rebuild it. It's also the perfect time to add a counterweighted crankshaft to greatly prolong the life of the babbit.

BILL WILLIAMSON · 10-25-2016, 03:00 PM

Quote:

Originally Posted by Tom Wesenberg

I couldn't get anything to load to hear the sound, but I sure know what the center main with no babbit sounds like because that was the case when I bought my 29 Tudor. It sounded so nice at the swap meet when I heard the engine idle, but when I got it home and drove it over about 15 MPH it sounds like a broken down threshing machine.

Time to pull the engine and rebuild it. It's also the perfect time to add a counterweighted crankshaft to greatly prolong the life of the babbit.

Guru, Claude, bought a '29, with a rebuilt engine & a center main knock! "Someone" forgot to adjust it, the shim packs were INTACT!
Bill W.

RUNNERBUN · 10-25-2016, 05:34 PM

Quote:

Originally Posted by Tom Wesenberg

I couldn't get anything to load to hear the sound,.

Tom, same happened to me. Failed to open on the first try. Went back in latter and had a second go and it opened.

10-24-2016, 11:21 PM	#1
luchoster Junior Member Join Date: Sep 2016 Location: Las Vegas, NV Posts: 14	Engine Knocking Hello everyone! I finally got my truck starting as I wanted. Thanks to the help of one of the forum local users (he did all the work). Anyway, I went for a ride and now I hear this Knocking sound when I accelerate. Video below so you can hear it too https://goo.gl/photos/McMEfGZfD5DKWj1E6 Please help, I'm not sure what that could be or how bad is it. Thanks!

10-24-2016, 11:39 PM	#2
H. L. Chauvin Senior Member Join Date: May 2010 Posts: 4,179	Re: Engine Knocking Mechanic's stethoscope from Amazon.com might be a good start to try to pinpoint the source of this sound. Joy riding with a knock is never a good idea.

10-25-2016, 12:31 AM	#3
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,012	Re: Engine Knocking Find it before it kills your project. I wouldn't start it again until the pan was dropped to check the bearings and rod bushings.

10-25-2016, 05:18 AM	#4
Big hammer Senior Member Join Date: Jun 2014 Location: Land of Lincoln Posts: 3,166	Re: Engine Knocking I listened to it, and that sounds bad! No more joy riding until you find out why.

10-25-2016, 06:05 AM	#5
RUNNERBUN Senior Member Join Date: Nov 2011 Location: Queensland Australia Posts: 640	Re: Engine Knocking Sad to say that it certainly sounds like you have a big end bearing that has failed. Pull the pan and check. I suspect you will find there will be lots of broken babbitt in dipper wells. As Franklin and big hammer said, don't drive it until you find the problem. You might consider just running it at idle and short out one spark plug at a time. If indeed you have a failed babbitt on one rod the knock will almost disappear when the bad rod is shorted out. __________________ Adjust your points with gentle blows of a 2 pound hammer

10-25-2016, 07:16 AM	#6
Safewiz Senior Member Join Date: May 2016 Location: South Florida Posts: 147	Re: Engine Knocking Sponsored Links (Register now to hide all advertisements) Agree with above. Drop the pan, check for any material in pan, then check rods and mains. Good luck and let us know what you find. __________________ Coral Springs Florida

10-25-2016, 07:26 AM	#7
James Rogers Senior Member Join Date: May 2010 Location: Asheville,NC Posts: 3,104	Re: Engine Knocking Center main or a rod. Looks like it is time for some engine work. __________________ http://www.model-a-ford-4bangers.com/

10-25-2016, 07:29 AM	#8
George Miller Senior Member Join Date: May 2010 Location: NC Posts: 2,975	Re: Engine Knocking As James said center main.

10-25-2016, 07:38 AM	#9
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Engine Knocking Shorting out # 2 & # 3, at the same time, will SILENCE a center main knock! Bill W. __________________ "THE ASSISTANT GURU OF STUFF"

10-25-2016, 09:28 AM	#10
luchoster Junior Member Join Date: Sep 2016 Location: Las Vegas, NV Posts: 14	Re: Engine Knocking Thank you for the responses. I will have to start working on that then. I'll keep you posted Sent from my ZTE A2017U using Tapatalk

10-25-2016, 09:37 AM	#11
V4F Senior Member Join Date: May 2010 Location: ca. Posts: 2,522	Re: Engine Knocking center main __________________ V4f

10-25-2016, 10:41 AM	#12
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Engine Knocking I couldn't get anything to load to hear the sound, but I sure know what the center main with no babbit sounds like because that was the case when I bought my 29 Tudor. It sounded so nice at the swap meet when I heard the engine idle, but when I got it home and drove it over about 15 MPH it sounds like a broken down threshing machine. Time to pull the engine and rebuild it. It's also the perfect time to add a counterweighted crankshaft to greatly prolong the life of the babbit.