Hi, all. To all of you who helped me on the radiator insturction, I finally finish replaced the radiator. nothing really to talk about except it is easy like you all said.. but.. the bad part is now i have another question to ask you guys.<br><br>After I replace the radiator... I went for a test run. .. i was running around the highway for about 5 mins.. and the temp. gauge went up.. ( almost to the Hi. spot. ) but then it went back down just 2 sec after that.. and it haven't go back up again.... so i thought it was a transition thing... but. this morning.. same thing happen.. after 5 to 10 mins running the car.. it did the same thing.. and it didn't happen again..... I do notice one thing.. every time the car get cool off for about 3 to 4 hr... and restart again, it does this weird thing after 5-10 mins of running the hard.. (doesn't matter if i run it hard or not... its still the same.) <br>I asked a shop, and he said it is probably the Temp. Meter. Or do you guys have any suggestion? Please advise. Thank you very much in advance.

It's one of two things. The thermostat could be a little sticky and doesn't open until the car gets almost to the red. once it does the car cools normally and the temp comes back down.<br><br>The other thing could be the fan switch kicking on and cooling the car once it gets hot. This is pretty normal. <br><br>As long as it doesn't go up and stick in the red, no problem.

To me it sounds as though you have air trapped in the system and it needs to be bled out. Also what the last guy said sticky t-stat. Hope this helps.