Tony Hawk's American Sk8land - Downtown Finding the plunger

Hollywood: Finding the wrench
Look in front of the blue car and the stairs.

Old School gaps
Old School Hollywood: The small transfer on the Hollywood sign.
Old School School: The handrail to the right of the lockers.
Old School Downtown: The two blue benches near the coffee shop close to the entrance from school.
Old School Vans: The curved rail near the mini-pit.
Old School San Francisco: The sidewalk on the Golden Gate Bridge.

School Yard: Finding the toolbelt
Look between the two red benches.