After checking the cap and headgasket issues check that you have you purged all the air out of the system, the bleeder valve is located near the top radiator hose connection on the engine.
Do this on a cold started car running on fast idle (choke knob on 2 clicks in the accord) or just use the throttle pedal to raise rpms to 1500- use a plastic funnel jammed in the radiator neck and fill it slowly - unscrew the bleeder valve and see for spurts of air - when the stream becomes a steady liquid tighten it.
another point is - is your radiator original? If not are you sure its sitting where its supposed to, because the 83 models and onwards have the rad cap and top of the engine at the same height, it forces air to get trapped easily thats why there is a bleeder valve.
If your radiator cap is sitting below the original level (due to stupid radiator design) you will never get all the air out and cook your engine