I want to remove my crank sprocket so that I can replace the front main seal.
There is a video on youtube of a fellow that hammers the key and eventually removes it.
http://www.youtube.com/watch?v=Wfk5D1sDxuA
Skip to 40second mark.
I was thinking that the sprocket should be removable with a small jawed pulley puller with the crank key in place.
What does the service manual say on this?
Jay Johnson
Mine was corroded on there pretty badly. Even with the key out, it would not budge. Eventually had to use a hammer and chisel on the teeth to get it to turn and break loose, which also required a new sprocket.
Heat and freeze-off worked for my stuck gear. Ymmv.
I have had no issues during timing belt changes and seal replacements, but I am very liberal with the PB Blaster. You may want to try soaking all affected parts in PB Blaster before beginning.
Hope this helps.
Mike Walsted - Not an expert, just a data point.
1999 Miata
2003 MIata
1999 Miata
2001 Kia Rio