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Allis Chalmers Discussion Forum
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Opinion on D-14 valve seepage

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cbp

07-18-2006 13:57:39




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I'm getting ready to put my D-14 together. Had a blown head gasket and has sat for years. This thing had run perfectly till it mixed the anti-freeze and the oil. I dumped some gas in the valves through exhaust and intake ports and all the exhaust valve seats just gushed it out. The seats were badly pitted. I took a 30 and 45 degree stone and jigged them soundly and eliminated the pits and cut the 30 degree head face in and lapped. The valves themselves look perfect (oddly). Anyway, after reassembly, now I pour a bit of gas in and I see seepage slowly blossom out after the count of three or so.

A valve job will cost me another two weeks according to the only fellow in the county who has a machine. We are hurtin for the machine right now. I'm wondering if I should go with it and wait till winter to send the head off for a real valve job. Any opinions if it will run good enough to finish out the summer. Almost can't believe it was running so well before.

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BCnT

07-18-2006 15:13:52




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 Re: Opinion on D-14 valve seepage in reply to cbp, 07-18-2006 13:57:39  
try lapping it in a lil more for a tighter seal but for practical purposes it should hold up till fall...i've seen worse than that put back together.



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cbp

07-18-2006 20:37:01




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 Re: Opinion on D-14 valve seepage in reply to BCnT, 07-18-2006 15:13:52  
Thanks, I had the same feeling but needed some push I think. I had to cut deeper on a couple but just lapped the rest and hit the 30 degree stone again for good measure to clear the head surface. It sealed it up pretty well and without the grinding machine. We"re going to button it up tomorrow. I"m wondering if this is exactly how people used to have to handle it. It"s fascinating that in some places, you can"t get someone to grind a valve or cut a seat anymore. I"d bet no one works on their own stuff. I think I"m going to buy me a old grinding outfit (if I can find one ;-)).

Chris

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