[AT] JD 318 head bolts

[Jim & Lyn Evans]

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