[DeTomaso] aluminum head removal update, maybe

[Will Kooiman]

Some of mine rusted too, but not so bad as to make them hard to remove.

Once I got the heads off, I could tell the bolt holes were compressed at the top of the head, and only on the exhaust side.  I used a drill to open them back up, and it only cut the top 1-2 inches of the head.

I've been using very wide/thick washers to help spread the load.  So far, that has solved the problem.

I have seen head bolt bushings that fit inside the bolt hole maybe 1/4" to prevent the compression.  Search for TFS-51400419, and you'll see what I mean.  I considered using these, but didn't need to since the wide washers solved the problem.

Good luck getting the rest out.

On 1/19/21, 2:49 PM, "DeTomaso on behalf of Jack DeRyke via DeTomaso" <detomaso-bounces at server.detomasolist.com on behalf of detomaso at server.detomasolist.com> wrote:

       Smokey Yunick used to say that you could minimize stud alignment
       problems by coating the stud threads with epoxy, then screw the studs
       in finger tight, add heads and torque the stud nuts to specs. This
       pulls the studs straight and when the epoxy cures, holds the stud
       straight- assuming the stud surface of the head was parallel to the
       block deck surface to begin with.  Pulling the studs afterward was not
       addressed and I think the heads in quetion were cast iron which is
       stiffer
       -----Original Message-----
       From: Joseph F. Byrd, Jr. <byrdjf at embarqmail.com>
       To: detomaso at server.detomasolist.com
       Sent: Tue, Jan 19, 2021 9:04 am
       Subject: Re: [DeTomaso] aluminum head removal update, maybe
       On a similar vein. . .
       The practice for bottoming studs on heavy equipment was to put in a
       "soft" disk so the stud end would not compress on the casing bottom.
       This helps keep more threads in tension and reduces the break away
       friction when removing.
       Would that be an engine builder's practice also?
       -----Original Message-----
       From: DeTomaso [mailto:[1]detomaso-bounces at server.detomasolist.com] On
       Behalf Of Ken Green via DeTomaso
       Sent: Tuesday, January 19, 2021 11:40 AM
       To: Daniel C Jones
       Cc: [2]detomaso at server.detomasolist.com
       Subject: Re: [DeTomaso] aluminum head removal update, maybe
       Dan,
           Is this difficulty in pulling the heads common when head studs are
       used or is there another factor?  Should some anti-seize product be
       applied to the studs?
       Ken

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