Driving home just a few minutes ago I looked down and my temp gauge was nearly 3/4 so i pulled off into a parking lot, steam was coming from under the hood so I popped it and shut her down, coolant was leaking out of the cap so I loosened a little and relieved all the pressure, a lotttt of coolant came out, I filled it up with a few half empty water bottles I had then started it..was at normal temp now..drove it home..let it idle in the driveway for a few minutes..no overheating or anything..no coolant spilling out..but my heat was cold on the 3-4 minute ride home, no warmth to it at all, just blowing cold air.

What's up with all this? First I thought my cap was bad..ok replace cap and be good..tightened it down and it didn't leak anymore but I haven't really put it to the test..if it were bad why would my heat be cold?

 

sounds like you need a new thermostat

 

+1 for the thermo, hope it isn't your heater core, NOT fun AT ALL to change out lol.

 

Well I added coolant when I got home since almost all spilled out..burped the system a few times..drove it for a while today and went to school, left school and it did fine on the way to eat and back to school so I'm just going to see what happens I guess

 

air in the system can def do it too...friend of mine changed his and didnt get it full burped and it sky rocked like yours well hopefully thats all it needed

 

The wifes 01' did too, just needed a good burp.