The radiator support on all hondas/acuras are all tack welded in. you will see like a small indentation of a circle at every tack weld.
welded on
bolted in from new
The chasis is usually both bolted and welded and even riveted in the trucks.
Bolted on
because it is
Its welded.
I have an 87 Ranger and it is welded on.
They are bolted on
Yes but the car is a uni body which means the body is the frame. and the core support does not bolt in it must be welded.
they are usually bolted on in the front of the converter.
It's bolted on the body, welded on the door. Door pin/bushing replacement guide: http://www.digitalrevo.com/jeep/doorpins.html
The radiator support on a 91 Accord is a welded on part. Removal requires removing the bumper, headlamps, and fenders. Once these parts are out of the way you must drill out the spot welds that hold it to the frame rails and apron. The new piece must them be fitted and welded in place. On a 91 Accord (and nearly every other honda) the radiator support is a structural piece and should be replaced under the supervision of a trained profesional.