[AT] Drawn out 1949 AC-B engine rebuild

[Recentjester at aol.com]

Warren: this is kinda like telling u how to fly a plane when  the pilot 
just died an u are the only one left to land it. Plastigauge is what u  need to 
check the clearances on your mains and con rods. if it does not pass  take 
it to a place that will turn down the wore out journals (if they have any  
meat left) If it needs that then complete tear down is necessary including  
changing the cam bearings, new freeze plugs, block hot tanked and all head  
work done, oil passages rodded with wire brushes. 
 
 
In a message dated 3/7/2015 4:04:07 P.M. Central Standard Time,  
mogrits at gmail.com writes:

Okay,  assuming your comment about making shims is not referring to emptying
beer  cans, do I have to replace the main berings or is that just considered
good  practice "since you're in there"? These are the kind of questions I
have.  Do I drop the crankshaft and take it to a (who do I take it to?) to
have it  checked and ground and trued if necessary? Or can I just unbolt the
rod  bearings and remove the pistons and sleeves, install new and if so, do
I  install new rod bearings and how do I know what size to use? I am
assuming  re-using rod bearings is verbotten.

Warren

On Sat, Mar 7, 2015  at 4:37 PM, <Recentjester at aol.com> wrote:

> I have one engine  three back halves need to get busy too on  rebuilding
> mine. My  current excuse is making the rod and main bearing  shims
>
>
> In a message dated 3/7/2015 3:34:10 P.M. Central  Standard Time,
> mogrits at gmail.com writes:
>
> About  10  yrs ago my B became very hard to start and just as hard to  
keep
> running. A  compression test revealed...that it had almost  none!
>
> So one weekend  while a cousin was visiting we tore  down the tractor and
> engine and found  we could rock the pistons  in the cylinders by hand.
> Obviously the pistons,  rings or  sleeves or all the above were very 
worn. I
> bagged all the bolts   and photo-documented it all and still have all the
> parts neatly  arranged  but have not touched it in that time. I need to 
get
> off  my butt and get  that tractor back in the field.
>
> What are  the lists recommendations as  to how to proceed? I purchased
>  Spencers book on engine rebuilding and read  it years ago, but it is  
still
> outside my wheelhouse as to what is necessary  and what  isn't. What do I
> check in the crank and what will need to be  done  there based on those
> findings? Head/valve work while it's  apart?
>
> I'm  asking for the kick in the pants that I've  missed since George  
Willer
> passed.
>
> (BTW, this  tractor has no ignition issues as the  magneto was very
>  professionally rebuilt by the now passed list  member/magneto  whisperer
> whose name I can't recall) He was an extremely  kind  and funny man. When 
he
> returned the rebuilt magneto he warned me  not  to park the tractor 
outside
> as an errant breeze might move  the tractor  enough to generate a  spark!
>
>  Warren
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