You can open up then console and give the internals a clean with a tin of compressed air. Replacing the thermal paste with arctic silver 5 which seems pretty recommend will surely help as thermal paste dries out and hardens over time becoming less effective.
I would also suggest if using webman mod to adjust fan speed to try and stop the CPU reaching these temperatures.
Finally do this asap I would not play any intense games or even use it if possible as those temps are extremely high, until you sort this I left it to late and sadly got then ylod on my old phat RIP.
Good luck