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Ford 9N, 2N & 8N Discussion Forum
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901-D valve seals

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B. Jones

02-20-2004 18:41:05




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Did a 901-Diesel come from the factory with intake valve seals? When you do valve work on these tractors do you put seals on the valves? Sorry guys but I did not get a reply on the Ford board so thought maybe one of you would help me out on this. Thank you for any help.




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Dell (WA)

02-20-2004 19:27:53




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 Re: 901-D valve seals in reply to B. Jones, 02-20-2004 18:41:05  
Jonesy..... ..as a general rule, ALL overhead valve engines benifit from valve stem seals, especially the intake valves which will have oil sucked passed the valve guide and burned out the exhaust for smokey engine. What most people don't realize is that the vary nature of valve stems being under constant spring pressure and constant pounding, the stem strectches just minutely and that is what causes the oil leak.

Of course, the very nature of overhead valves and rocker arms require an "oil bath" sprayed from the rocker arm shaft. This oil bathes all the moving parts including the valve stems and is kept by gravity ontop of the valve guides unless sealed by valve guide seals gets sucked into the engine.

As to wheather or not the 901 Diesel engine came from the factory with valve stem seals, I don't know. If not, I'd probably have the machine shop install them. It might take some specialized machineing to fit valve stem seals, but they have the specialized fly-cutter and do it all the time..... ....Dell

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B. Jones

02-20-2004 19:57:18




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 Re: Re: 901-D valve seals in reply to Dell (WA), 02-20-2004 19:27:53  
Dell, thank you very much for your reply. I always have a little bit of blue smoke and new pistons and rings did not totally stop the oil use. I know there are no valve seals on the motor. Again, thank you. Barrett Jones



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