i have a1998 toyota camry that runs hot. the temp guage goes up then comes back down i actually heard bubbling last night

Make sure that your electric fans are working. Start car and let it warm up to temperature. Open the hood and watch your fans. They should kick on when car becomes hot. You also may have air trapped in your cooling system. Try your local auto store, they sell kits to bleed out trapped air in cooling systems. http://www.summitracing.com/parts/rnb-902-301

Take the wire off. Sender ground it it schould turn fan on main fan If not replace relay and switch The ac fan turns on when fan for ac is on or when ac is on

Autozone has a kit to ck head Gskt Easy to ck Pluger with tube put chem. put pluged at cap pull fumes from rad if chem change color head Gskt need replaced