So before you took the old motor out the dryer worked but it made a noise well running, correct?
Then after you replaced the motor you could not get the dryer to run at all, even after you put the old motor back in?
If so are you sure you plugged everything back in. Like the door switch on the front of the dryer or anything else you may have unplugged well testing things before?
If you have had the blower off and back on don't worry about what I said before, you did it right.
Some of the blower wheels don't say what way to turn them.
I could find the model number of your dryer, but could not locate a diagram.
So I'm not 100% sure what dryer you have, but from what you have said about the motor I think it's the one made by Whirlpool.
Kenmore does not make any appliances. They only put there name on them.
John@FreeApplianceRepair.com
www.FreeApplianceRepair.com