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Technical Chasing a vibration-Solved

Discussion in 'The Hokey Ass Message Board' started by 51pontiac, Jul 22, 2021.

  1. anthony myrick
    Joined: Sep 4, 2009
    Posts: 8,359

    anthony myrick
    Member

    Friend of mine used the generic flathead style biscuits mounts from places like speedway.
    No issues.
     
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  2. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    Anthony…thanks. I think I am going to order something along that line. Just doing research now.
     
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  3. anthony myrick
    Joined: Sep 4, 2009
    Posts: 8,359

    anthony myrick
    Member

    I also use em for core support mounts :)
     
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  4. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 9,380

    Johnny Gee
    Member
    from Downey, Ca

    Where's the other half that @alchemy mentioned early on?
     
  5. squirrel
    Joined: Sep 23, 2004
    Posts: 49,536

    squirrel
    Member

    Some vibration is normal....that's why rubber motor mounts exist in the first place, eh?
     
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  6. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    Johnny…I used it and the bolts, big base and washers with the temporary cushions. They were not nearly as hard. 86AC1725-D6A2-4B22-B794-6E201393DC53.jpeg
     
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  7. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 9,380

    Johnny Gee
    Member
    from Downey, Ca

    ^^^^^ See the little cushion that goes under the frame portion of the mount?
    [​IMG]
     
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  8. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 9,380

    Johnny Gee
    Member
    from Downey, Ca

    Here's a better pic.
    [​IMG]
     
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  9. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    044FA42E-6F4F-4C37-844C-9CAB25392FC6.jpeg Yup..I had it in place on the old mounts and reused it with the temporary cushions. It works well as an isolator with the large hole. They were in ok shape, not nearly as hard as the biscuit.
     
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  10. Mr48chev
    Joined: Dec 28, 2007
    Posts: 29,795

    Mr48chev
    ALLIANCE MEMBER

    They may not be the best one out there but you can buy the top and bottom pieced for a 52 Ford F-1 Motor mount from Rock Auto for pocket change. 1952 FORD F1 3.9L 239cid V8 Motor Mount | RockAuto
    You do need the cushion top and bottom of the mount on the frame. Otherwise when the cushion collapses a bit the bolt will move enough to bang on the bottom side of the mount on the frame.

    Easy to find locally and not very big are 55/57 Chevy motor mount biscuits. they will only work if you have a bolt size hole in the mount though. They won't work if you have a hole for the Ford mount to work with.
     
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  11. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    Mr48chev…thanks for the link.
     
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  12. harpo1313
    Joined: Jan 4, 2008
    Posts: 2,288

    harpo1313
    Member
    from wareham,ma

    This thread Im sure will help folks in the future. Glad you found the issue.
     
  13. carpok
    Joined: Dec 29, 2009
    Posts: 462

    carpok
    Member
    from Indy

    Interesting read glad you found the problem.
    I have a 57 Chevy truck fresh 383 column shift auto transmission. When I first got it running the shift level would move quite a bit when I stepped on the gas hard. I was using the cheep rubber side mounts that came with the cross member kit. A few weeks ago I installed some new poly mounts fixed the shifter movement but now the rear view mirror has a vibration at certain speeds. Go figure
     
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  14. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    Carpok…finding the balance between rigid enough to avoid excessive movement and yet soft enough to absorb the vibrations is the challenge I anticipate for me. As MadMike said in a previous post even unused but old items on the shelf lost their flexibility. I have no doubt it will take some trial and error to find the correct biscuit. Interestingly my peep mirror vibrated a lot but the inside rear view mirror didn’t.
    Cheers
     
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  15. alchemy
    Joined: Sep 27, 2002
    Posts: 17,091

    alchemy
    ALLIANCE MEMBER

    Don’t use the biscuits from Speedway, they will collapse in a year. Speaking from experience.
     
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  16. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    Thanks for the heads up!
     
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  17. AngleDrive
    Joined: Mar 9, 2006
    Posts: 973

    AngleDrive
    ALLIANCE MEMBER
    from Florida

    I think I used biscuits from Bob Drake. Some out there are pretty bad.
     
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  18. y'sguy
    Joined: Feb 25, 2008
    Posts: 470

    y'sguy
    Member
    from Tulsa, OK

    Great thread. Glad you pursued it and taught me a thing or two. Well worth your effort.
     
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  19. Greg Rogers
    Joined: Oct 11, 2016
    Posts: 444

    Greg Rogers
    Member

    I've been following, glad you got it!
     
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  20. MAD MIKE
    Joined: Aug 1, 2009
    Posts: 656

    MAD MIKE
    Member
    from 94577

    I was pretty happy with the swap mounts I picked up, just never used them. I recall looking at all sorts of brands/types from JC whitney to the local hot rod shop, and that was before the internet was any good with searches.
    You can get the replacement mounts with the metal covers. Trans-Dapt 9314
    I like the idea of the covers, they can protect the mounts from oil and junk, and if the old fella from years gone by was correct, when the covers touch the mount is worn down.

    Rock Auto pricing is very hard to beat, probably pay more in shipping. FWIW in an OT vehicle I used DEA brand to replace a broken mount, I thought the rubber was a bit firm. But it may have just been the application. Old mount was destroyed so nothing really to compare to.

    Poking the bear :p
     
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  21. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    MadMike…you read my mind..I ordered the Transdapt mounts a couple hours ago. They will be here Monday. I really need to get some miles in this car again. It doesn’t look pretty anymore but is solid and will get some attention over winter.
    Thanks!
     
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  22. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 3,436

    2OLD2FAST
    Member
    from illinois

    Or split !
     
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  23. Boneyard51
    Joined: Dec 10, 2017
    Posts: 5,073

    Boneyard51
    Member

    I used old stock Ford Flathead mounts when I put a 430 MEL in my 55 Ford. But I put one between the engine and frame, one on the bottom and one on the top and put a long bolt through all three. If you do this, just snug the bolt and put a cotter key in it. I lost the nut and ran the fan through the radiator one time! Was super smooth and lasted for years, until I sold it. But that was in 1966, so they weren’t as old as they are now. Henry put good rubber in his cars back then!








    Bones
     
    Last edited: Jul 31, 2021
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  24. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    478A6B7D-0DEC-46F4-B4D8-7618B37CFCB3.jpeg 62DE0B04-23D7-40CA-BDBD-025F1F0BEE39.jpeg Just to wrap this thread up I figured I would report that the new mounts ( transdapt 9314) are installed and work well. The car is now nice to drive, very little vibration transferred to body, frame or steering. As well, it is now running nice thanks to the complete tune up. Still a few details to tidy up but it is definitely drivable now so it should see some miles on it before the snow falls.
    Big thanks to all who threw in their 2 cents…it was appreciated!
     
  25. Thanks for providing the wrap up summary...been following along on your progress. Fun read and I looked forward to your daily reports and findings.
     
    Last edited: Aug 4, 2021
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  26. Truck64
    Joined: Oct 18, 2015
    Posts: 4,829

    Truck64
    Member
    from Ioway

    Yeah, all those things that weren't the issue, well, they probably needed a little tightening up anyway, ha ha.

    Should be a dream to drive now!
     
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  27. 51pontiac
    Joined: Jun 12, 2009
    Posts: 239

    51pontiac
    Member
    from Alberta

    Just got back from a 20 mile drive, car ran great and I am very encouraged. Had to come home as the gas gauge doesn’t work yet and I wasn’t sure how much gas is in the tank (parts are sitting on the work bench though).You are absolutely right that stuff needed a bit of tightening up and in some cases readjustment. I have loved driving this car from the time we first got it and flat towed it 20 miles home on gravel roads back in 1973 and today’s drive just reaffirmed it, 48 years later. I will be spending my upcoming winter doing odds and ends on it mechanically and my wife and I plan to reupholster it again as well. Not planning any cosmetic changes at this point, sorta like the character it has.
    Cheers all!
     

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