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.

Hi Doug;
I think there is some form of loctite on the pulley bolt as well - I've
had trouble with a few of them.
Try a 6' or 8' pipe extension with a friend.
Good Luck
Cary

Cary,

OK will do.  Thanks

Doug in Japan