change timing belt the 2 camshaft turn but crankshaft don't
on 1998 Lexus GS400

where is the #1 spark

Asked by for the 1998 Lexus GS400
If the crankshaft won't turn(with plugs out would make it easier) by hand , then either the valves are hitting it ,or there is more to the story , than what we're getting. Did the belt break while running? Engine overheat or run low on oil?Where all the gear marks lined up before removal of old belt?.?????