Toyota Repair: 1994 camry overheating, electric cooling fans, toyota camry

Question
i have a 1994 toyota camry LE 4 cyclinder.  the water in the radiator will begin to boil on any trip longer than 30 minutes.  when it boils back into the overflow reservoir, it then spills out and my car will run hot.  what is making the water boil like that?  we have already changed the thermostat and the water pump.

Answer
It's boiling over because the engine is overheating and the radiator cap can no longer contain the pressure so it opens up and dumps the coolant into the reservoir bottle.
There are a couple of things to check, the radiator may be clogged and not circulating the coolant enough to cool it down, the electric cooling fans may not be coming on,there may be a headgasket leak especially if there is white steam coming from the tailpipe so have it checked for those possible causes.