The Ford Barn

Dtolson9 · 05-25-2016, 12:57 AM

My 4 banger developed a loud knock today. Can anyone give me pointers on where I should start to fix my problem?

Utopia Texas · 05-25-2016, 05:41 AM

Can you give more facts to help determine where the knock is generated? How many miles on the engine? What was going on when the knock started? At idle, acceleration or all the time? Could be a myriad of things from main bearings, rod bearings, wrist pins, piston slap, crankshaft lateral play, crank to cam gear play, cam tensioner spring etc. start by giving some facts and then the group can give you some educated guesses.

BILL WILLIAMSON · 05-25-2016, 09:14 AM

If you suspect the center main, short out #2 & #3 at the same time & it'll be quiet.
Bill W.

burner31 · 05-25-2016, 09:17 AM

Have you checked your oil?
Level/smell/color

Dtolson9 · 05-25-2016, 10:37 AM

Miles of the engine are unknown. The car was sitting there idling and I accelerated a little and the knock started up and is there at idle and acceleration. If you email me I have a video of it running so you can hear what I'm talking about. [email protected]
I have checked the oil and it looks like oil and doesn't have any strange smells and is where it's supposed to be

Tiny · 05-25-2016, 11:29 AM

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Quote:

Originally Posted by Dtolson9

Miles of the engine are unknown. The car was sitting there idling and I accelerated a little and the knock started up and is there at idle and acceleration. If you email me I have a video of it running so you can hear what I'm talking about. [email protected]
I have checked the oil and it looks like oil and doesn't have any strange smells and is where it's supposed to be

I sent you an email

tbirdtbird · 05-25-2016, 11:33 AM

post the vid on youtube

Tiny · 05-25-2016, 11:36 AM

Disclaimer: I haven't watched them yet just helping out David

Click on the thumbnails for the video

Tiny · 05-25-2016, 05:44 PM

I don't what it is but it sounds similar to a friends engine that a wrist pin got loose in and scored the cylinder really bad. Time to pull the head and oil pan and start investigating. I wouldn't be running it anymore until I opened it up

Dtolson9 · 05-25-2016, 05:51 PM

Anyone have any ideas?

700rpm · 05-25-2016, 07:03 PM

It doesn't sound like a main in the videos, at least to me. I'd check wrist pins and rod bearings first, since that is one step to the mains.

tbirdtbird · 05-25-2016, 07:09 PM

would not load for me
takes me to photobucket then nothing happens, just blank screen

Dtolson9 · 05-25-2016, 08:16 PM

Anyone think it could possibly be the oil pump?

Brian T · 05-25-2016, 08:28 PM

As it started knocking suddenly after reving the engine, but was OK yesterday I would think it was most likely the timing gear coming apart.

Dtolson9 · 05-25-2016, 08:39 PM

In the videos posted there is a video of it running and not knocking and a couple minutes later it started knocking

Tom Wesenberg · 05-25-2016, 09:11 PM

Quote:

Originally Posted by tbirdtbird

would not load for me
takes me to photobucket then nothing happens, just blank screen

The same thing for me.

Dtolson9 · 05-25-2016, 09:12 PM

This was the first time I have ran the motor for more than 5 minutes since I got and I have no clue how many years it's been sitting

Dtolson9 · 05-25-2016, 09:13 PM

Email me tom and tbirdtbird and I can send you guys the video. [email protected]

WestCoast · 05-25-2016, 09:18 PM

check and see if the crank pulley is loose , it can cause knock like a bad main bearing

CT Jack · 05-25-2016, 09:36 PM

Before pulling the pan try doing the timing gear test. Remove the timing pin on the front of the engine. Find a 1/4" or 3/8" wood dowel approx. 1-1/2" - 2" long. It should be long enough to hold with your fingers. Start the engine and slowly insert the dowel in the timing pin hole until it makes contact with the turning timing gear. Lightly push on the pin and listen to the knock. If the knock goes away or gets softer as you push the dowel your problem is a worn timing gear. This is a fairly simple repair to make.

05-25-2016, 12:57 AM	#1
Dtolson9 Member Join Date: Apr 2016 Posts: 78	Ford model a knock My 4 banger developed a loud knock today. Can anyone give me pointers on where I should start to fix my problem?

05-25-2016, 09:17 AM	#4
burner31 Senior Member Join Date: Dec 2014 Location: Shawnee, Ok Posts: 3,471	Re: Ford model a knock Have you checked your oil? Level/smell/color __________________ Keith Shawnee OK '31 SW 160-B

05-25-2016, 10:37 AM	#5
Dtolson9 Member Join Date: Apr 2016 Posts: 78	Re: Ford model a knock Miles of the engine are unknown. The car was sitting there idling and I accelerated a little and the knock started up and is there at idle and acceleration. If you email me I have a video of it running so you can hear what I'm talking about. [email protected] I have checked the oil and it looks like oil and doesn't have any strange smells and is where it's supposed to be

05-25-2016, 11:33 AM	#7
tbirdtbird BANNED Join Date: May 2012 Location: inside your RAM Posts: 3,134	Re: Ford model a knock post the vid on youtube __________________ '31 180A

05-25-2016, 11:36 AM	#8
Tiny Senior Member Join Date: May 2010 Location: Redding Cal Posts: 1,388	Re: Ford model a knock Disclaimer: I haven't watched them yet just helping out David Click on the thumbnails for the video __________________ Blackwall Panthers Nor Cal chapter Last edited by Tiny; 05-25-2016 at 11:50 AM.

05-25-2016, 05:41 AM	#2
Utopia Texas Senior Member Join Date: Apr 2016 Location: Brookshire & Cat Spring,Texas Posts: 222	Re: Ford model a knock Can you give more facts to help determine where the knock is generated? How many miles on the engine? What was going on when the knock started? At idle, acceleration or all the time? Could be a myriad of things from main bearings, rod bearings, wrist pins, piston slap, crankshaft lateral play, crank to cam gear play, cam tensioner spring etc. start by giving some facts and then the group can give you some educated guesses.

05-25-2016, 09:14 AM	#3
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Ford model a knock If you suspect the center main, short out #2 & #3 at the same time & it'll be quiet. Bill W. __________________ "THE ASSISTANT GURU OF STUFF"

05-25-2016, 05:44 PM	#9
Tiny Senior Member Join Date: May 2010 Location: Redding Cal Posts: 1,388	Re: Ford model a knock I don't what it is but it sounds similar to a friends engine that a wrist pin got loose in and scored the cylinder really bad. Time to pull the head and oil pan and start investigating. I wouldn't be running it anymore until I opened it up __________________ Blackwall Panthers Nor Cal chapter

05-25-2016, 05:51 PM	#10
Dtolson9 Member Join Date: Apr 2016 Posts: 78	Re: Ford model a knock Anyone have any ideas?

05-25-2016, 07:03 PM	#11
700rpm Senior Member Join Date: May 2010 Location: Portland, Oregon Posts: 5,906	Re: Ford model a knock It doesn't sound like a main in the videos, at least to me. I'd check wrist pins and rod bearings first, since that is one step to the mains. __________________ Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole.

05-25-2016, 07:09 PM	#12
tbirdtbird BANNED Join Date: May 2012 Location: inside your RAM Posts: 3,134	Re: Ford model a knock would not load for me takes me to photobucket then nothing happens, just blank screen __________________ '31 180A

05-25-2016, 08:16 PM	#13
Dtolson9 Member Join Date: Apr 2016 Posts: 78	Re: Ford model a knock Anyone think it could possibly be the oil pump?

05-25-2016, 08:28 PM	#14
Brian T Senior Member Join Date: May 2010 Location: San Diego,Ca Posts: 1,377	Re: Ford model a knock As it started knocking suddenly after reving the engine, but was OK yesterday I would think it was most likely the timing gear coming apart. __________________ Nothing can be made foolproof, ---- fools are ingenious bastards.

05-25-2016, 08:39 PM	#15
Dtolson9 Member Join Date: Apr 2016 Posts: 78	Re: Ford model a knock In the videos posted there is a video of it running and not knocking and a couple minutes later it started knocking

05-25-2016, 09:12 PM	#17
Dtolson9 Member Join Date: Apr 2016 Posts: 78	Re: Ford model a knock This was the first time I have ran the motor for more than 5 minutes since I got and I have no clue how many years it's been sitting

05-25-2016, 09:13 PM	#18
Dtolson9 Member Join Date: Apr 2016 Posts: 78	Re: Ford model a knock Email me tom and tbirdtbird and I can send you guys the video. [email protected]

05-25-2016, 09:18 PM	#19
WestCoast Senior Member Join Date: Sep 2014 Location: oroville calif Posts: 893	Re: Ford model a knock check and see if the crank pulley is loose , it can cause knock like a bad main bearing

05-25-2016, 09:36 PM	#20
CT Jack Senior Member Join Date: May 2010 Location: Hebron, CT Posts: 432	Re: Ford model a knock Before pulling the pan try doing the timing gear test. Remove the timing pin on the front of the engine. Find a 1/4" or 3/8" wood dowel approx. 1-1/2" - 2" long. It should be long enough to hold with your fingers. Start the engine and slowly insert the dowel in the timing pin hole until it makes contact with the turning timing gear. Lightly push on the pin and listen to the knock. If the knock goes away or gets softer as you push the dowel your problem is a worn timing gear. This is a fairly simple repair to make.