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Harry Ferguson Tractors Discussion Forum
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TO 20 valves

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ken blystone

08-11-2005 09:59:45




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hey guys, I just wanted to keep all you updated, I took off the head today and found that piston 1,3,4 had about an 1/8 or so, gone for one or both of the valves. The pistons walls look good and shinny with no scoring. As I took my tractor apart today I was amazed how all the bolts came loose, even the manifold bolts. took about hour and half. So everything else looks in good order, good oil circulation. So the big question guys, where to go for valves,, do i get them and put them in my self,is there a kit for valves and head gasket? take it to a shop and drop it off, what are your suggestions, I have put valves in my wheel horse, with a valve lapper ect. But I value you guys opinion, I will be waiting for your replies. ken

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gshadel

08-11-2005 14:42:14




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 Re: TO 20 valves in reply to ken blystone , 08-11-2005 09:59:45  
Ken, I agree with all the other guys. I did the complete valve job a couple years ago, all new valves, guides, keepers, and those little rubber o-rings that go on the intake valves. I got my stuff from this web site. You will be well served with the valve rebuild kit, plus the valve grind gasket set.. that should have everything you need and a few $$ cheaper than buying individual parts.

I pulled the old valves off and baggied everything by cylinder (just in case), cleaned-up the head pretty good, (which turned out to be a waste of my time), then took the head and guides to a machine shop to press in the guides and shape-up my valve seats. The shop super cleaned and painted the head (looked like brand new), checked for warps and cracks, pressed the new guides,shaped-up the seats, and gave me back a A-1 Z-120 head. The price tag was $70. I was giddy for a couple days after that !

I installed the new valves, etc. myself, piece of cake, no special tools needed... although compressing the valve springs to get the keepers on was rather "exciting" until I borrowed a valve spring compressor tool from the local Auto Parts Store.
I probably didn't need it, but I lapped my valves anyway when I installed them.


George

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Steve in Mo.

08-11-2005 13:43:58




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 Re: TO 20 valves in reply to ken blystone , 08-11-2005 09:59:45  
I did the same job last winter to my TO_20 1950. The machine shop found a crack in the head I never would have spotted. The shop is very relieable and told me I could have it welded if I knew someone capable and then would not have the $300 cost of a replacement. Welding shop did the work for $85 and it is perfect. I will readjust the valves this fall pretty sure that is a good thing.



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Little Dave

08-11-2005 13:26:16




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 Re: TO 20 valves in reply to ken blystone , 08-11-2005 09:59:45  
Ken I bought a valve kit for my TO-30 for about $100.00 which was all new guides, valves, springs, and keepers. Took it to an automotive machine shop and they cleaned, checked, and replaced four intake seats and installed all the new parts for $80.00 They ground the seats at 45 degrees and the valve at 44 degree for longer life. This '54 TO-30 may run another 50 years. Dave



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Jim in OH

08-11-2005 11:35:31




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 Re: TO 20 valves in reply to ken blystone , 08-11-2005 09:59:45  
If your time is worth anything, I suggest taking it to a reputable machine shop.. It is not that expensive and they should have sources for proper parts.. Jim



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Jerry/MT

08-11-2005 11:32:12




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 Re: TO 20 valves in reply to ken blystone , 08-11-2005 09:59:45  
If your valves are in that bad of shape, you might want to consider taking the head into a machine shop and have it checked out. They'll check the head for flatness, replace worn valve guides, check the seats and replace the valves and stem seals, check the springs and replace the rotaters on the exhaust valves, if required. I supppose you could just replace the damaged valves and seals, lap them and see if that works. (I'm not sure whether new valves come pre-ground but I doubt it. If not you'll have to havethem ground and fitted anyway.) If it doesn't, you'll have to remove the head again and take it in to the machine shop. Your call!

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