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Subject: 8N valve guide removal

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Dave in Santa Rosa    Posted 02-03-2021 at 18:51:09 [URL] [DELETE]        [Reply] [Email]  
  • 8N valve guide removal
  • I am new to this board and new to the internals of an 8N, although not unfamiliar with engines. I am currently disassembling the engine on an early (five digit) 8N, which looks pretty good but will get new pistons and rings, valve assemblies, rod bearings and possibly sleeves. The current sleeves are at the limit for wear.
    My question has to do with the valve assemblies. The book shows a special tool to lift the guide in order to remove the retainer. The video shows a lovely young lady doing the same with a modified screwdriver. I have been able to remove three intake valve assemblies, and to wrestle out a couple more retainers, but the remaining guides are not interested in leaving. Do I need to use the heat wrench on these, or is there another trick?
    Thank you in advance for whatever light can be shed. I'm sure I'm not done here.

    popsh    Posted 02-04-2021 at 18:17:12 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N valve guide removal
  • Dave - As Mark indicated, I had to remove the valves first, then drive the guides down from the top using a hammer and socket.

    dave    Posted 02-08-2021 at 13:14:32 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N valve guide removal
  • Thanks, popsh, that method worked perfectly for me.

    mhb@ufe    Posted 02-03-2021 at 21:07:11 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N valve guide removal
  • Most all ways at least some of the guides are stuck to hard to push them down to remove the retainers. I clamp vise grips on the tab of the retainer and pry them out then use a chisel on the spring to drive them. Some people remove the valves and drive them out from the top.


    Dave in Santa Rosa    Posted 02-03-2021 at 21:49:34 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N valve guide removal
  • Thanks, Mark. I just found that method of removing the valves described in the archives.
    Seems obvious now that I think about it.

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