1998 toyota camery overheating

Are the fans working? If not check them and your temp sensor, relays ect. Otherwise test for proper compression on all cylinders and test for exhuast in coolant to find out if your head gasket has blown.

The fans are working but they will cut on for about 30 seconds at a time and then back off when its hot in a case of a blown head gasket would the blue devil gasket sealer liquid work well?

The fans should run until temp is in normal range and stays there. I think you need to test the temp sensor, as for the blue devil, I would not used it. At this point you have not confirmed it to be gasket or not. But if it is gasket related I still would not use, It has solids that stop up the internal cooling passageways. There is only one that I would use and would only do so in a certain procedure and if I could not do so from start to finish which takes a few days then I would not use it either, and that is NA-40 Sodium Silicate AKA liquid glass. The real deal, you can not buy it in any store anymore, (used to get at drug stores). Now the only place to buy is on-line. If done correctly it works if engine is still running. I will post a URL below pointing to a post on it, Its long and has some clearifications I added later to it so read it all and if you do not fully understand it or need more info let me know. Its the only way I would try anything out of a bottle, the store bought stuff is not going to fully work and if it does or not it for sure stops it up with solids. There is a air dry time with this and have tried both ways and it works if its air dry cured and will work too if not air-dried but may not last as long or stays softer. But like I said you may not even need it and there is a risk with it, but the risk goes up if not done correctly but in my view is not anywhere near as risky as the store bought filler filled cures in a bottle. To point out this procedure was used well before anything for head gaskets were in stores except drug stores and this was the only thing that was used for such and used to be widely known.

Take a high pressure water hose stream and wash the radiator.... as you drive through dusty conditions, dirt builds up in the fins of the radiator. I had overheating problems, replaced hoses, thermostat, water pump.... and all it actually needed was the dirt washed out that was restricting air flow thru the radiator!