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EFV-8 Club Forum / General Ford Discussion / Clutch

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Discussion Topic: Clutch -- page: 1 2

engine

09-15-2017 @ 6:13 AM

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I have a 1941 Ford Station Wagon that has had a vibration in the motor. I just had the engine rebuilt and it still has this vibration. The clutch is a 11" and I am wondering if being that size verses a 9"or 10" if in fact that could cause the problem. I know that trucks had the 11" but the car from what I understand did not. It idles fine but the increase in rpm causes the vibration. If I put my hand on the floor panel I can feel the vibration near the clutch area. I have had the clutch and pressure plate balanced and it is with in 17 grams . The crankshaft was also balanced during the rebuild. New valves,springs, piston rings. Any idea would be great.

shogun1940

09-15-2017 @ 6:54 AM

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Does the vibration change with the clutch pedal depressed?

carcrazy

09-15-2017 @ 7:37 AM

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On your 1941 Ford the fan is mounted to the nose of the crankshaft. Did you have the fan balanced when the crankshaft was done? Your fan may be causing the vibration. Does the vibration lessen when the engine speed is increased?

engine

09-15-2017 @ 8:49 AM

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I should have also said it has a 59 block, I took the fan off to see if it had made a difference, it did not. The vibration starts about 1200 rpm I would say and continue on up . I have driven it up to 60 mph at it is quite notable to the point that the steering wheel shakes. The vibration is there if the car is sitting still or driving. If you run first gear up and second gear the higher rpm cause the vibration.

engine

09-15-2017 @ 8:51 AM

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The vibration doesn't change with the clutch pedal depressed or let out

cliftford

09-15-2017 @ 12:39 PM

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Of course an 11" clutch is over kill,but it shouldn't cause that problem. I'm inclined to think somebody goofed in the balancing process.

carcrazy

09-15-2017 @ 12:51 PM

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Maybe the generator pulley or one of the waterpump pulleys is not concentric or is out of round. Also any of the bearings in the generator or water pumps may be bad. The armature in the generator may be dragging on the field coils. Do you hear any unusual noise when the vibration occurs or is it only perceived as a shaking?

supereal

09-15-2017 @ 1:31 PM

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Remove the belt and see if that eliminates the problem. If not, it is time to contact the rebuilder. To properly balance a crankshaft, "bob weights" equal to the piston and rods must be attached at the time of balancing, otherwise just checking the bare crank is not balancing .

engine

09-15-2017 @ 1:55 PM

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I had taken the belt off as well as the fan , the engine shook more before it was rebuilt but it still has the vibration. I will be taking the car to the engine rebuilder next week and have him see what he thinks. I will ask him about the bob weight, good to know. I just thought that maybe the 11" clutch might have caused it but the trucks had it also with the same engine. Thanks for all your thoughts. The generators ok.

carcrazy

09-15-2017 @ 8:19 PM

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Are the pins offset in the pistons of your engine? If so, one or more of the pistons may be installed incorrectly.

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