If you have the ability to yank the motor and clean the WHOLE engine bay, I would do it if I were you. Otherwise, degreaser, elbow grease and a ton of soap and water will be sufficient. If it's rusty/damaged, the dremel kit may be a worthy purchase if you don't have an angle/disc grinder, which is what I used.
Try seeing if your neighbours have a dremel tool kit before you go out and purchase one
Best of luck!!
DK1