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Grinding Tappets ( Cam followers )1935-1947 6 and 8 Hudson engines.
  • Henk_BroughHenk_Brough
    Posts: 27Hitchhiker
    From Barry Sweetman ( he has the idea from Geoff Clark )I have got the idea to use the pinhole from an old piston ( same diameter ) for grinding the surface from the tappets or cam followers.
    I take of the underside of the skirt. ( laid )
    I drilled a hole in the thick alloy fixing of the piston pin, and tapped M6
    in it. With a small inside hexagonal grub screw I can fix the cam follower
    in the pin hole from the piston. It cannot move now and with a very simple
    grinding machine with sand paper you can grind to a new state.
    This small grinding machines you can buy in Holland for less than $ 100,-.
    Important is that the “ table “ with the old piston on it, is exact 90º with the disk with the sandpaper.
    Also the tappet adjustment bolt can be grind as you can see on one of the photo’s.

    Photo 1 : Old and “ new ” State of the tappets.

    Photo 2 : Original and Turn off piston

    Photo 3 : Grub screw fixing. Perhaps it is better to turn a little less
    From the skirt to have a little more room for the Grubscrew.

    Photo 4 : Piston with the tappet on the small grinding ( sandpaper disk )
    Machine. This type of machine you can use for a lot of
    treatments.

    Photo 5 : With a small piece of round bar it is very simple to grind the
    Tappet adjusting bolt.

    In the past so many Hudson enthusiasts’ has helped me with all sort of problems that I hope my small contribution can help someone else.
    All the best from the Netherlands ( Holland )

    Henk ten Ham

  • Uncle JoshUncle Josh
    Posts: 1,860Platinum Member
    Nice. Thanks for the idea. Uhh, can you describe a grub screw? Is it like our set screw with no head?
  • Henk_BroughHenk_Brough
    Posts: 27Hitchhiker
    Yes, it is no longer than 6-7 mm long. You can have them just with hacksaw cut in it, to use a screwdriver or with a hexagonal inside and use the special hexzgnal " Screwdrivers for it.
    Excuses my photo's are not gone with the file. Try another time.
  • walts garage-53
    Posts: 1,470Platinum Member
    Why not install new ones and have an easier time adjusting them. They are available. Walt
  • bob wardbob ward
    Posts: 527Platinum Member
    Walt, are you saying that new cam followers are available for these engines? Please divulge a source!
  • Geoff C., N.Z.Geoff C., N.Z.
    Posts: 2,270Platinum Member
    Dale Cooper is supplying new cam followers. However, if you have only slightly worn lifters, and can do them yourself you will save a few drachmas!
    If you're stuck in a hole, stop digging.
  • walts garage-53
    Posts: 1,470Platinum Member
    He has a ad in the WTN, parts for sale, or go to his Web page at www.hudsonmotorcarco.com and see all he has for sale. Regrounds will not last long but the new ones will. Walt.
  • Geoff C., N.Z.Geoff C., N.Z.
    Posts: 2,270Platinum Member
    I beg to differ, reground lifters will last just as long as a new one. They are hard all the way through, not case hardened.
    If you're stuck in a hole, stop digging.
  • walts garage-53
    Posts: 1,470Platinum Member
    I built a 1951 Hudson 8 for a fellow to install in a 1934 Hudson and he wanted to drive it like me. Well, after 15,000 miles his reground lifters started to make noise and they were bad. new ones installed, now driven 24,000 miles and they still are quiet. If you are a short distance driver, with no high speed, regrinds are OK. Walt.