I'm using Bruce Turrentine's DVD to overhaul a 20B. On the rear of the
  engine there is a counter weight under the flywheel that didn't appear on
  the 13B in Bruce's video. Anyone familiar with this and know how to
  remove
  this counter weight?

  Jay


  I think you mean the flex plate for the auto transmission.
  The 20B is very similar to the 3rd gen RX7 engines. 1993 to
  2003.

  For that you will need a gear puller and a way of locking the E-shaft
  with a special plate.

  Go to this location:

  http://foxed.ca/foxed/index.php?page=rx7manual

  and download the chapter C engine.pdf shop manual:
  http://foxed.ca/rx7manual/manuals/1993FSM/


  Here is an excerpt.

  Paul Lamar


For the 13B, you can use the six bolts / bolt holes connecting the
flexplate/driveplate to the counterweight.
The 10?mm CW bolt thread pitch is common to many RX7 bolts.  You may
want a few that are slightly longer.

- Lock the flex/driveplate
- Loosen the 54mm locknut but leave it on a few threads (so it does not
fly off and crush your toes, even more important with a flywheel).  A 6'
breaker bar extension helps.
Without the stock puller:
- I use pieces of scrap angle iron between the rear iron and the CW to
push against with bolts in the CW bolt holes. (angle iron placed to
distribute the load)
- Turn the bolts 1/4 turn each in the usual star pattern and it will pop
right off.

Cheers
Cary


Cary,

What about the front end?  I am having a bear of a time getting the
pulley bolt to budge.  I made a device that was similar to the Mazda
tool to lock the flywheel from turning and braced the engine with a
stout U-beam, sprayed WD-40 on the bolt and used a four foot pipe over
the breaker bar.  Still no joy.  Guess I have to try a longer pipe or
gain a few more pounds huh?


Doug in Japan.