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Head repair??????

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Antique puller

03-04-2003 16:04:54




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Anyone ever have a crack in a head repaired by drilling and pinning the crack? What kind of success did you have?

Thanks




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BlueLite

03-06-2003 05:58:55




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 Re: Head repair?????? in reply to Antique puller, 03-04-2003 16:04:54  
I have an old Popular Mechanic magazine book that fixed the problem simply with a drill and a tap set and a few screws.

It said to find the end of the crack and drill
at the end of these with the end of crack center of hole. Tap screws at these locations. This ends the stress on the block. Working in from these ends, drill a series of holes along the crack and tap in screws, (I might add for these days use some epoxy on the thread)until the length of the crack is filled with tapped screws.

I know, not very practical, but we're talking post war advice. Anyway, that's interesting trivia. I've heard in similar cases you can also heat up the head evenly and weld it with nickle rod or grind a groove and braze it.

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Clipper

03-04-2003 21:43:20




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 Re: Head repair?????? in reply to Antique puller, 03-04-2003 16:04:54  
Yup. A skilled machinist can certainly get it done for you. Had that done on the head of a 64 Kaiser Jeep truck 15 years ago-that truck can still raise a good dust cloud....



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scottAR

03-04-2003 17:23:00




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 Re: Head repair?????? in reply to Antique puller, 03-04-2003 16:04:54  
The head on my dad's M had seven cracks in 1976. The cracks were pinned and the tractor was overhauled again two years ago and the head is still good.



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Red Raider

03-04-2003 17:18:17




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 Re: Head repair?????? in reply to Antique puller, 03-04-2003 16:04:54  
The process is permanent the hands of a skilled machinist. I know a fellow that has done hundreds of heads and blocks (to repair freeze cracks). I've seen his work and it's amazing a crack in at the valve seat counterbore can be repaired. Waymond Greenwood (Greenwood Auto Supply and Machine Shop) in Ranger, Texas can fix you up.



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Draw Bar

03-04-2003 16:41:39




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 Re: Head repair?????? in reply to Antique puller, 03-04-2003 16:04:54  
Nope , I never tried it. However I was told that it worked really well. The old timer that told me how he did it said you start at the edge of the crack,drill a hole ,tapp the hole,then install a stud with locktite in the hole. Drill your next hole so that it removes part of the stud you just put in. Keep working your way across the crack in the same manner until you have covered the crack completly. Of corse you have to cut off and grind down each stud as you go. Sounds time consuming to me, but I guess if it's a hard to find head and and it's not cracked up to bad. It might be worth a try. Good luck!

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Bill V

03-04-2003 16:30:07




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 Re: Head repair?????? in reply to Antique puller, 03-04-2003 16:04:54  
I have a 1946 John Deere G that had cracks on both sides of the head and I had it drilled and pinned by a hot rod shop in Batavia NY. I built the motor in hte tractor for pulling and have no trouble with the head since. I was very skeptical of the proceedure when I forst heard about it but it seems to work.
Bill



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