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05-25-2016, 09:47 PM
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#21 |
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BANNED
Join Date: May 2012
Location: inside your RAM
Posts: 3,134
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Re: Ford model a knock
have not seen/heard vids
1. do what Bill said #3 2. then short out one plug at a time to see if anything changes 3. knock only at idle? Only on accel? only on decel? Please clarify report back when u short out a plug you take a long screwdriver and hold it between the top of the plug or the strap and the cyl head
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'31 180A |
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05-25-2016, 10:59 PM
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#22 | |
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Senior Member
Join Date: May 2010
Location: Redding Cal
Posts: 1,388
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Re: Ford model a knock
Quote:
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Blackwall Panthers Nor Cal chapter |
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05-25-2016, 11:39 PM
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#23 |
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Join Date: May 2012
Location: inside your RAM
Posts: 3,134
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Re: Ford model a knock
LOL of course we did. The screen was totally blank
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'31 180A |
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05-25-2016, 11:45 PM
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#24 |
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Senior Member
Join Date: May 2010
Location: Redding Cal
Posts: 1,388
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Re: Ford model a knock
The knock is pronounced enough that I would not start that motor again. A gasket set is cheap I'd open it up
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Blackwall Panthers Nor Cal chapter Last edited by Tiny; 05-26-2016 at 09:32 AM. |
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05-26-2016, 01:07 AM
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#25 |
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Senior Member
Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,779
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Re: Ford model a knock
Another timing gear test: Remove spark plugs and slowly turn engine over with the hand crank. If the gears are worn, there will be a distinct clack as the valve springs push the cam ahead of the crank (two valves at a time open, putting a load on the gears. Then two other valves close, and the springs pushing on the lobes push the cam ahead of the crank='clank'!)
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05-26-2016, 04:58 AM
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#26 |
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Senior Member
Join Date: May 2010
Location: Asheville,NC
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Re: Ford model a knock
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http://www.model-a-ford-4bangers.com/ |
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05-26-2016, 05:06 PM
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#27 |
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Senior Member
Join Date: May 2010
Location: Lakewood, CA
Posts: 1,346
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Re: Ford model a knock
All good suggestions.
I wish I had those suggestion back when I owned my first Model A. The engine developed a rather large knock. I never did figure out where the knock was coming from, but I finally had to replace the engine because it was using too much oil.  Neil |
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05-26-2016, 07:24 PM
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#28 |
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Senior Member
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,560
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Re: Ford model a knock
Tolson,
If you happen to have the starter off, see if the flywheel will rotate back & forth 1/8" or so. If so, the flywheel bolts are loose. This is a fairly common problem. Bill Tight
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"THE ASSISTANT GURU OF STUFF" |
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05-26-2016, 08:50 PM
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#29 |
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Member
Join Date: Apr 2016
Posts: 78
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Re: Ford model a knock
I will be trying all these things Saturday and I will report back with my finding. Thank you all
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05-28-2016, 03:35 PM
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#30 |
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Member
Join Date: Apr 2016
Posts: 78
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Re: Ford model a knock
Found the problem. Cylinder 4 piston is in pieces in the oil pan.
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05-28-2016, 04:00 PM
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#31 | |
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Senior Member
Join Date: May 2010
Location: Portland, Oregon
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Re: Ford model a knock
Quote:
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Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole. 
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05-28-2016, 04:07 PM
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#32 |
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BANNED
Join Date: May 2010
Location: Bucks County, PA
Posts: 11,454
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Re: Ford model a knock
Did you also have a miss and or possible excessive blowby due to that piston?
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05-28-2016, 06:09 PM
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#33 |
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Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Ford model a knock
Any idea what caused it?
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05-28-2016, 06:26 PM
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#34 |
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Member
Join Date: Apr 2016
Posts: 78
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Re: Ford model a knock
It would studder a little at first and be completely fine after. Didn't smoke or anything just sounded awful. No clue what caused it. I'm assuming at one point the motor was stuck and a previous owner hit the top of it with a hammer since it gouges in it. The cylinder had no scrapes or anything in them
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05-28-2016, 06:53 PM
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#35 | |
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Senior Member
Join Date: May 2010
Location: Portland, Oregon
Posts: 5,906
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Re: Ford model a knock
Quote:
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Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole.
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05-28-2016, 08:36 PM
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#36 |
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Senior Member
Join Date: Apr 2013
Location: santa rosa ca
Posts: 257
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Re: Ford model a knock
A friend of mine had a couple slightly loose flywheel bolts and you would swear it was a rod.
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05-29-2016, 01:00 AM
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#37 |
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Member
Join Date: Apr 2016
Posts: 78
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Re: Ford model a knock
Here's pics
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05-29-2016, 01:01 AM
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#38 |
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Member
Join Date: Apr 2016
Posts: 78
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Re: Ford model a knock
Anither
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05-29-2016, 07:36 AM
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#39 |
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Senior Member
Join Date: Sep 2012
Location: New Jersey shore
Posts: 257
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Re: Ford model a knock
Wow that sucks, looks like there was some detonation going on in that hole. Whats your next step?
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05-29-2016, 08:33 AM
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#40 |
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Senior Member
Join Date: Dec 2014
Location: Shawnee, Ok
Posts: 3,471
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Re: Ford model a knock
Yuk
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Keith Shawnee OK '31 SW 160-B |
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