Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 06-13-2021, 02:39 PM   #1
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Knock Knock

Have a knock that sounds like it is coming from the Starter or possibly the flywheel. Any ideas! Thanks! Thanks
Fred F. Griffin is offline   Reply With Quote
Old 06-13-2021, 02:52 PM   #2
Gene F
Senior Member
 
Join Date: Mar 2012
Location: Ohio
Posts: 680
Default Re: Knock Knock

When did this start? You have owned the car for years? What have you investigated so far? When you drive the car down the driveway, does load, or coast affect it? Only knock when idling?
Gene F is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 06-13-2021, 03:52 PM   #3
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Re: Knock Knock

Started it up to pull back in the garage and heard the knock. Pulled it in and proceeded to use a 1” wood dowel rod to listen and find the noise (old trick my dad taught me). Seems like the majority of the noise was coming from th starter area.
Fred F. Griffin is offline   Reply With Quote
Old 06-13-2021, 03:53 PM   #4
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Re: Knock Knock

I put my hand on the starte and can feel it. Possible flywheel problem?
Fred F. Griffin is offline   Reply With Quote
Old 06-13-2021, 03:55 PM   #5
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Re: Knock Knock

Starter problem? Just don’t know. Hate the thought of removing the motor.��
Fred F. Griffin is offline   Reply With Quote
Old 06-13-2021, 04:04 PM   #6
700rpm
Senior Member
 
700rpm's Avatar
 
Join Date: May 2010
Location: Portland, Oregon
Posts: 5,747
Default Re: Knock Knock

Sponsored Links (Register now to hide all advertisements)
Pull the starter & check for damaged spring or spring bolt, condition of the bendix drive, and trueness of the shaft. Run a bench test on it by attaching jumper cables and watch for wobble. While you have it off, turn the engine by hand and observe the flywheel gear to ascertain any chipped, broken, or missing teeth. If all this seems good, I don’t know what else I’d check.

Put your location in your avatar. There may be someone close to you can help.
__________________
Ray Horton, Portland, OR


As you go through life, keep your eye on the donut, not the hole.
700rpm is offline   Reply With Quote
Old 06-13-2021, 04:28 PM   #7
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Upstate NY and western Florida
Posts: 6,347
Default Re: Knock Knock

Kinda sorta sounds like the stater drive is hitting the ring gear. Just remove the starter and take a look. While its out check that the ring gear hasn't walked and is in place.
Patrick L. is offline   Reply With Quote
Old 06-13-2021, 04:37 PM   #8
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Re: Knock Knock

It is an AR flywheel. WHat do you mean by “walked”?
Fred F. Griffin is offline   Reply With Quote
Old 06-13-2021, 04:41 PM   #9
Tacoma Bob
Senior Member
 
Tacoma Bob's Avatar
 
Join Date: May 2010
Location: Tacoma, WA
Posts: 971
Default Re: Knock Knock

Quote:
Originally Posted by Fred F. Griffin View Post
It is an AR flywheel. WHat do you mean by “walked”?
Ring gear is loose and ready to come off.
Tacoma Bob is offline   Reply With Quote
Old 06-13-2021, 05:30 PM   #10
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Upstate NY and western Florida
Posts: 6,347
Default Re: Knock Knock

Quote:
Originally Posted by Fred F. Griffin View Post
It is an AR flywheel. WHat do you mean by “walked”?


The ring gear can move over the years and might not be against the flange as it should. Once the starter is out just take a look as you turn the engine over to get a good look at the full diameter of the flywheel. If it's 'walked' you'll see a gap. If thats happened the wheel can be driven/tapped back into place and staked. The engine can be turn over using a screwdriver/prybar thru the starter hole against the ring gear.
Patrick L. is offline   Reply With Quote
Old 06-13-2021, 05:53 PM   #11
1crosscut
Senior Member
 
1crosscut's Avatar
 
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,562
Default Re: Knock Knock

Remove the starter and start it using the hand crank. If the noise is gone you've narrowed down the possibilities.
__________________
Dave / Lincoln Nebraska
1crosscut is offline   Reply With Quote
Old 06-13-2021, 06:30 PM   #12
Greg Jones
Senior Member
 
Greg Jones's Avatar
 
Join Date: Jul 2010
Location: Aiken, South Carolina
Posts: 647
Default Re: Knock Knock

Pulling a Model A starter is not so bad, pretty easy actually in the big scheme of things. Another thing to check is starter mounting bolts being too long, but I presume if that was the case you would have heard it long before now.
Greg Jones is offline   Reply With Quote
Old 06-14-2021, 11:23 AM   #13
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Alberta, Canada
Posts: 3,313
Default Re: Knock Knock

Take one of the cables off the battery before removing the starter.
When removing the starter, remove one bolt, replace it with a headless bolt. Then remove the other 2 bolts. When reinstalling the starter the headless bolt helps to hold the starter in place while you re-install the other 2 bolts.
__________________
Play it again Sam.
katy is offline   Reply With Quote
Old 06-14-2021, 03:39 PM   #14
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Re: Knock Knock

What does “staked” mean? In one of the replies. Thanks!
Fred F. Griffin is offline   Reply With Quote
Old 06-15-2021, 10:00 AM   #15
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Alberta, Canada
Posts: 3,313
Default Re: Knock Knock

Quote:
Originally Posted by Fred F. Griffin View Post
What does “staked” mean? In one of the replies. Thanks!
Staking is using a sharp punch to displace metal to make something fit tighter. For example, if one had a nut that was a loose fit on a bolt or stud, taking a hammer and a sharp punch and punching a bunch of divots on one side of the nut, close to the threads.
Another example would be on a starter or generator, where the flat head bolts holding the field poles in place there is no lock washer. Sometimes the metal around the head of the bolt is staked (using a sharp punch, displacing some of the body metal) to "lock" the bolt in place.

Hope this makes sense.
__________________
Play it again Sam.
katy is offline   Reply With Quote
Old 06-22-2021, 12:53 PM   #16
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Re: Knock Knock

Took starter out and found that the flywheel ring gear was walking out. The starter pinion gear was worn and not meshing with the ring gear. It was hammering the gear off. Kept turning the flywheel with the crank and lightly taping it back tight. Then I will stake it to the flywheel next. Wish me luck and thanks for the ideas!
Fred F. Griffin is offline   Reply With Quote
Old 06-22-2021, 03:36 PM   #17
CarlG
Senior Member
 
CarlG's Avatar
 
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 8,800
Default Re: Knock Knock

Who's there?
__________________
Alaskan A's
Antique Auto Mushers of Alaska
Model A Ford Club of America
Model A Restorers Club
Antique Automobile Club of America
Mullins Owner's Club
CarlG is offline   Reply With Quote
Old 06-22-2021, 03:54 PM   #18
Fred F. Griffin
Junior Member
 
Join Date: Jun 2021
Posts: 19
Default Re: Knock Knock

Fixed the problem! Back in the game! Yes
Fred F. Griffin is offline   Reply With Quote
Old 06-22-2021, 04:15 PM   #19
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Upstate NY and western Florida
Posts: 6,347
Default Re: Knock Knock

Good.
Patrick L. is offline   Reply With Quote
Old 06-22-2021, 05:46 PM   #20
700rpm
Senior Member
 
700rpm's Avatar
 
Join Date: May 2010
Location: Portland, Oregon
Posts: 5,747
Default Re: Knock Knock

Thanks for the followup.
__________________
Ray Horton, Portland, OR


As you go through life, keep your eye on the donut, not the hole.
700rpm is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 11:12 PM.