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Re: No valve seals found in IH 404 prior to rebuild.

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Author  [Modern View]

12-22-2012 06:15:55

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The machinist should have previous experience and will already know which brand and style works best.

My opinion. If there are no valve seals on it now, and the parts manual does not call out for any, then you do not want any. It is entirely possible to get a tight enough oil seal that the valve stems and guides will suffer from insufficient lubrication and could quite possibly sieze up. I've witnessed it myself.

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12-22-2012 09:02:54

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 Re: No valve seals found in IH 404 prior to rebuild. in reply to MisterT, 12-22-2012 06:15:55  
Oil was coming by the guides though, and I don't have the money at this time to put new guides in. I think he'll put seals in, he's getting the head in about an hour.

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12-22-2012 14:36:09

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 Re: No valve seals found in IH 404 prior to rebuild. in reply to RandyDowdy, 12-22-2012 09:02:54  
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The valve guides are extremely important. Replace the guides and you will NOT need the valve seals. In fact, if you do not replace the worn valve guides, you are just wasting your time and throwing a huge chunk of money.

DO IT RIGHT the first time and you will never need to do it again.

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12-22-2012 19:01:31

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 Re: No valve seals found in IH 404 prior to rebuild. in reply to MisterT, 12-22-2012 14:36:09  
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The head is being surfaced and valves ground. Machinist said guides were in good shape. And he has seals in stock. Maybe the rings were the only problem. I hope so. Can't wait to get it back together. Thanx. RD

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