[AT] JD 318 head bolts

[Larry & Barb Dotson]

Dennis
If you get the block straightened out, try using shorter bolts that will not 
protrude through the threaded area. If a quarter inch shorter bolt is too 
much, then just cut off the amount of excess from the original length and 
coat well with never-seize. This will keep this from occuring again.
Larry Dotson
----- Original Message ----- 
From: "Jim & Lyn Evans" <jevans at evanstoys.com>
To: "'Antique tractor email discussion group'" 
<at at lists.antique-tractor.com>
Sent: Friday, March 07, 2008 8:32 AM
Subject: Re: [AT] JD 318 head bolts


>I have never tried it but nitric acid will dissolve steel and not touch
> aluminum.  Google "nitric acid broken bolt"
> Use never seize when you put it back together.
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Louis 
> Spiegelberg
> Sent: Thursday, March 06, 2008 4:01 PM
> To: 'Antique tractor email discussion group'
> Subject: Re: [AT] JD 318 head bolts
>
> Take the block to a machine shop.  Have them drill the bolts out.  If the
> threads are damaged, they can be repaired by using heli-coils.  This is an
> accepted repair of damaged threads.
>
> Lou
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Dennis Johnson
> Sent: Thursday, March 06, 2008 2:51 PM
> To: at at lists.antique-tractor.com
> Subject: [AT] JD 318 head bolts
>
>
> I have a JD 318, and was trying to remove the heads so I could grind or 
> lap
> the valves.  In the process of removing the heads, 4 of the 5/16 inch head
> bolts snapped in the aluminum block. The problem is that there is some
> corrosion at the bottem end of the head bolts, so removing tries to take 
> the
> rusted ends of the bolts though all of the threads. One bolt that was 
> tight
> did come out, but it appeared that it may have galled threads in the block
> as it came out.
>  Does anyone have any good ideas other than re-power or a block change.
>
>  Thanks,
>  Dennis
>
>
> _______________________________________________
> AT mailing list http://www.antique-tractor.com/mailman/listinfo/at
>
>
>
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at