[DeTomaso] Boss 301 dismantling questions

[Julian Kift]

All good information, but Patrick does say in parentheses "(the engine being out of course)", but doesn't elaborate on the reason for the need to remove a single piston and rod.

As Larry stated it may be possible to mass balance one piston and rod to that one removed and presumably being replaced, but the reason to replace one would likely be because it is damaged or failed, thus likely not a good candidate to mass match or perhaps it failed because it was out of balance!

The term balancing can be taken in different context by different individuals, to some it is simply matching masses of the components (by manipulation of individual masses or selecting from a large number to get the most common set), to others it can be dynamically balancing on a purpose-built rig as it rotates. For a highly stressed race engine it's worth the cost to have the full rotating assembly professionally balanced.

As to the question of degree of disassembly; one should be able to leave the heads intact and work from the bottom of an engine on a stand, although that then precludes being able to check deck clearances on reassembly, but should not be a concern if replacing like for like components.

Julian

________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Forest Goodhart <forestg at att.net>
Sent: Friday, March 12, 2021 4:29 PM
To: Pantera Mike Drew <mikeldrew at aol.com>; Patrick HALS <patrickhals at gmail.com>; Larry Stock <larrys at panteraparts.com>
Cc: detomaso at server.detomasolist.com <detomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] Boss 301 dismantling questions

I note that he wants to remove the crankshaft also. To do this the transmission needs to be removed and the timing chain has to be removed, all while working within the confines of the car. Then there is trying to reinstall the piston into the bottom of the bore which isn't square without breaking a ring. By the time you do all of this you could pull the engine and remove one head to do it the right way.
Forest
    On Friday, March 12, 2021, 03:27:09 PM PST, Larry Stock <larrys at panteraparts.com> wrote:

    > On Mar 12, 2021, at 11:28, Patrick HALS <patrickhals at gmail.com> wrote:
    >
    >   Hi all,A
    >  Is thereA a way on a Ford Boss engine ( Dart aluminum block ) , to
    >  remove the crankshaftA and one piston with its rod, without taking the
    >  engine completely apart ?A
    >  We are thinking of removing those parts from the bottom of the engine (
    >  the engine being out, of course ) but we wonder if we can take one
    >  piston and rod out too at the same time ( for balancing purpose )A
    >  Thank youA
    >  Pat
    >  Candy 2862 - ADA 9628
    > _______________________________________________
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-------------- next part --------------
   All good information, but Patrick does say in parentheses "(the engine
   being out of course)", but doesn't elaborate on the reason for the need
   to remove a single piston and rod.

   As Larry stated it may be possible to mass balance one piston and rod
   to that one removed and presumably being replaced, but the reason to
   replace one would likely be because it is damaged or failed, thus
   likely not a good candidate to mass match or perhaps it failed because
   it was out of balance!

   The term balancing can be taken in different context by different
   individuals, to some it is simply matching masses of the components (by
   manipulation of individual masses or selecting from a large number to
   get the most common set), to others it can be dynamically balancing on
   a purpose-built rig as it rotates. For a highly stressed race engine
   it's worth the cost to have the full rotating assembly professionally
   balanced.

   As to the question of degree of disassembly; one should be able to
   leave the heads intact and work from the bottom of an engine on a
   stand, although that then precludes being able to check deck clearances
   on reassembly, but should not be a concern if replacing like for like
   components.

   Julian
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Forest Goodhart <forestg at att.net>
   Sent: Friday, March 12, 2021 4:29 PM
   To: Pantera Mike Drew <mikeldrew at aol.com>; Patrick HALS
   <patrickhals at gmail.com>; Larry Stock <larrys at panteraparts.com>
   Cc: detomaso at server.detomasolist.com <detomaso at server.detomasolist.com>
   Subject: Re: [DeTomaso] Boss 301 dismantling questions

   I note that he wants to remove the crankshaft also. To do this the
   transmission needs to be removed and the timing chain has to be
   removed, all while working within the confines of the car. Then there
   is trying to reinstall the piston into the bottom of the bore which
   isn't square without breaking a ring. By the time you do all of this
   you could pull the engine and remove one head to do it the right way.
   Forest
       On Friday, March 12, 2021, 03:27:09 PM PST, Larry Stock
   <larrys at panteraparts.com> wrote:

       > On Mar 12, 2021, at 11:28, Patrick HALS <patrickhals at gmail.com>
   wrote:
       >
       >   Hi all,A
       >  Is thereA a way on a Ford Boss engine ( Dart aluminum block ) ,
   to
       >  remove the crankshaftA and one piston with its rod, without
   taking the
       >  engine completely apart ?A
       >  We are thinking of removing those parts from the bottom of the
   engine (
       >  the engine being out, of course ) but we wonder if we can take
   one
       >  piston and rod out too at the same time ( for balancing purpose
   )A
       >  Thank youA
       >  Pat
       >  Candy 2862 - ADA 9628
       > _______________________________________________
       >
       >
       > Detomaso Email List is not managed by POCA
       > Posted emails must not exceed 1.5 Megabytes
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