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Allis Chalmers Discussion Forum
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WD manifold

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Hossman

04-25-2007 18:22:50




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Fellas, had repaired manifold leak last year on my Pa's WD and this solved the problem of cuttin out missin and so on, it was the gaskets were shot on the intake ports. We put new ones on and solved the problem, well the thing started actin up again and it was the intake gaskets they were loose tryin to slide out the bottom, well the manifold is as tight as we dare make it without breakin it and was wonderin since it seems the manifold is warped could a person have it planed down or add extra thick gaskets on the intake or what? just wanted some ideas out there. Thanks Hoss

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Hossman

04-26-2007 16:56:18




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 Re: WD manifold in reply to Hossman, 04-25-2007 18:22:50  
Fellas, Thanks so much for the suggestions will remove manifold next couple days and if the manifold looks to be the problem( as i suspect it is ) then I have a buddy that owns a small machine shop and will check into havin it milled. Thanks again so much for the help. Hossman



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Brian G. NY

04-26-2007 16:19:17




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 Re: WD manifold in reply to Hossman, 04-25-2007 18:22:50  
I used a "flat b stard" file about 12" long and carefully filed the manifold ports till they were all even and fit the head flat. A milling machine would have been handy for this!!! Would have saved a lot of "elbow grease. LOL



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Texas Denny

04-25-2007 20:25:46




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 Re: WD manifold in reply to Hossman, 04-25-2007 18:22:50  
I've taken 3 of these manifolds and put them on my milling machine and recut them. The head is least likely the problem. I had to cut one manifold 0.180" to get the manifold flat and get down to good metal. Hard to do that with a file and still have it flat. It may be cheaper to buy a new manifold than to mill it of abrasive cut it.



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Motorken

04-25-2007 18:48:07




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 Re: WD manifold in reply to Hossman, 04-25-2007 18:22:50  
Hossman, short of taking the block and manifold to the machine shop to have them both trued up...I would take the manifold loose and clean up the port decks on the block real good and then the same for the manifold. then take a small level or something straight and lay along block ports to see if they are all true...same for maniflold...once this is done you should have indication if manifold is warped...then bolt on manifold hand tight without gaskets and use feeler guage to determine which manifold port surface needs to be ground slightly to allow manifold to eventually contact block evenly. be sure to go slow and use a small 4" grinder with low rpm so as not to take off too much manifold surface accidentally...I did this with good results...also there are several providers of manifold gaskets for wd's get the ones wit the steel retainer cup if your having trouble with gaskets slipping...good luck!

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