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Vibration Damper/Harmonic Balancer


mikemaker

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  • 4 years later...

Don't know if this is the correct place to ask a question.

My 48 Plymouth coupe crank pulley has no center bolt holding it in place.

 

When I was replacing the frt. eng. mt. I pryed lightly on the pulley & noticed it slid forward.

The keyway is loose and I can move back & forth slightly & the only thing holding the pulley from flying off is the 12 volt alt. belt.

 

I also have a vibration in neutral when I rev the eng. up

 

Paul

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All Mopar flathead 6's had a large bolt holding the crank flange/pulley onto the crank..........I wouldn't run the engine till I got the bolt on.........from memory its 1 & 13/16th.........andyd    

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I'm just guessin but it seems that the crank pully was installed on 218 engines while the bigger ones got the hub/damper/pulley like Don runs....anyone know for sure.  My 218 runs nice and smooth with just the pully hub arrangement. 

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I'm just guessin but it seems that the crank pully was installed on 218 engines while the bigger ones got the hub/damper/pulley like Don runs....anyone know for sure.  My 218 runs nice and smooth with just the pully hub arrangement. 

 

My '33 PD has a damper on its original 190 cu. in. engine. At least in the early 1930s the DeLuxe model Plymouths got the damper but the Standard/Business/Roadking models got just a pulley. 

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All Mopar flathead 6's had a large bolt holding the crank flange/pulley onto the crank..........I wouldn't run the engine till I got the bolt on.........from memory its 1 & 13/16th.........andyd    

Thanks for the info. I think the car has been driven for yrs. without the bolt. Not by me but the previous

owner. I found a bolt at work. 5/8" 1/1/2 inch long NF thread. Can't tell if it fits. Will need to remove the radiator to access. May get rid of the vibration too.

 

I didn't realize it was missing until I changed the rubber mt. It was metal to metal. thought that was

the cause of the vibration. Wrong.

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