So I ran my Tacoma with the radiator cap off for about 20 minutes. A few bubbles came up to the surface and then stopped. No overheating while idling but it has only ever come close to overheating when I am on the highway after traveling for a while. Last time it happened I was on the highway for about 40 minutes and it came close to the red zone. But ever since I changed the timing belt and water pump on 4/9/2012 I swear the temperature gauge runs a little over half way and prior to that it ran about halfway exactly. I will have to take it on the highway again for a bit of a drive but I don't have time tonight.
After I was complete with the radiator burping. I noticed that when I have the heater set to defrost or if I have the A/C on any setting I get the loud squealing noise and the wheel that is attached to the A/C unit ( i believe its called the clutch) is slipping and traveling slower than the rest of the pulleys. Also the A/C blows hot air
Are these separate issues? Any other words of advice for each problem?