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TEA 20 Exhaust valves

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glen Ontario

02-02-2003 10:47:40




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Do the exhaust valves on the 2085 realy need to be rotated with the ratchet, washer,valve keepers or what ever you call it? Has any body open one to see what is going on in side ,It looks like mine has not worked in 30 years ,in side was like a brown mud that use to be small springs that would turn the valve stem as the valve opened and closed . Is this realy needed for light tractor use and when the tractor is in heavy use (plowing) is required.Do other low r.p.m engins have such ? The Tr3s have almost the same internal parts except for the exhaust valve keeper the Ferguson has this ratchet type. Any comments or ideas would be good since I am doing the head . PS Jim W if you read this you said you had main bearings 0.010 under size do you still have and how much ? I rewined one of six by being careless they only come in sets

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glen Ontario

02-07-2003 13:58:56




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 Re: TEA 20 Exhaust valves in reply to glen Ontario, 02-02-2003 10:47:40  
Thanks Jim I had a feeling that they are not realy needed ,One guy told me that the valves rotate them selves, Under extreme coditons they might be needed



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Jim W

02-05-2003 18:58:28




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 Re: TEA 20 Exhaust valves in reply to glen Ontario, 02-02-2003 10:47:40  
I had the head done on my 52 not long back, and there were no mechanisms like that. My bet is that you could survive without them.
I found that enough of the valve springs had sagged that I replaced all 8 of them (intake and exhaust are the same). I got them through MF for about $9 each I think.
The TR3 bottom end has some similarities alright but the head is fairly different; for sure the valves are bigger on the TR3 but then we're not often revving the 2085s up to 5 grand!
Sorry I don't have the mains bearings anymore. The Triumph ones are definitely the same though.
Jim

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