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EFV-8 Club Forum / General Ford Discussion / Flywheel Rubbing Block

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Discussion Topic: Flywheel Rubbing Block -- page: 1 2

tpenty1

02-19-2021 @ 6:25 AM

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My 1936 Ford 4D Sedan with 1946 A/B engine suddenly the flywheel ring gear is rubbing the block on one side. Does anyone make a spacer that could be used or do I just grind down the spot. Apparently when pressing in the clutch the flywheel moves forward causing the rub. Has anyone experienced this problem and what has been done? Look forward to any answers.

woodiewagon46

02-19-2021 @ 7:02 AM

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I'm curious to why you say it's "suddenly" rubbing. Was everything fine until recently? By depressing the clutch, you should never be able to move the flywheel forward to rub on the block. I think you are looking at an engine/trans removal to see what is going on.

TomO

02-19-2021 @ 7:28 AM

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Why do you think that the flywheel is rubbing on the block? A bad throwout bearing will make a lot of noise when the clutch pedal is depressed.

Because you suspect that your flywheel is moving, do not run the engine until you determine what is going on. A loose flywheel is very dangerous to you and the car.

I would first remove the floor boards and the transmission cover. Then you can remove the inspection cover and watch for movement when you depress the clutch.

If your flywheel is moving when you depress the clutch pedal, do NOT run the engine or drive the car. You will have to remove the engine to determine exactly why the flywheel is moving.

The flywheel needs to be firmly attached to the crankshaft and the bolts safety wired in order to prevent them coming loose. The crankshaft should not move enough to allow the flywheel to contact the block.

If the flywheel doesn't move when you depress the clutch, you can start the engine to see if the noise is coming from the throwout bearing.

Tom

1931 Flamingo

02-19-2021 @ 7:59 AM

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Is it possible the ring gear is loose on the flywheel??
Paul in CT

tpenty1

02-19-2021 @ 8:10 AM

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Already removed the clutch and plate and started the engine when a sound like when you placed a trading card on your bicycle spokes was heard so lowered the pan just enough to see where the wear was. Removing engine now so, stay tuned.

37RAGTOPMAN

02-19-2021 @ 8:27 AM

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this is a long shot,
throw out bearing seems like this could be the problem logically
I have seen loose ring gears,
but maybe a broken off starter bolt? or something else,
it is very unlikely that the crank is moving forward, if it is you need to check this out ASAP before running the engine,

I had this noise problem in a MODEL A,
to repair this , I removed the starter and packed the flywheel with wheel bearing grease
and turned the engine over with a hand crank slowly and the broken piece got stuck in the grease,
so I wiped off the excess grease off and it was fixed,
my 2 cents 37 Ragtopman, Maine

40cpe

02-19-2021 @ 3:09 PM

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My understanding is that a shoulder on the center main bearing limits crankshaft fore/aft movement. If there is a noise now, maybe it is broken.

carcrazy

02-19-2021 @ 10:55 PM

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Your crankshaft end play may be too large. The end play amount is limited by the thrust surfaces of the rear main bearing insert. The end play should be between .002" and .006" with a wear limit of .008". You can measure the end play by prying back and forth on the front crankshaft pulley with a crowbar. If the amount of endplay is too great, you could have the flywheel rub the rear of the engine block.

tpenty1

02-22-2021 @ 7:38 AM

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PROBLEM FOUND! The ring gear had moved a 1/4 inch on the flywheel and cut into the block casting making the sound I was hearing. Now what caused it to move as the ring gear is sweated onto the flywheel?? I recently converted to 12 volts and replaced the starter with a 12 volt and the older style bendix because the new style would not fit in the 36 hole. Could the bendix gear be pushing to hard into the ring gear....it surely sounds like it is spinning faster than the 6 volt. We had to reheat the ring gear to get it back on right. My engine is a 59 A/B 46 to 48. I am thinking if there was any wear it would be on the flywheel so mounting another ring gear may not be the solution. ANY IDEAS?

tpenty1

02-22-2021 @ 7:44 AM

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I just posted that I had found the problem you may be interested in what happened. Thanks for your response.

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