Hey Fiero Buddies,

So today I finally got my 86 SE up and running, and drove it to work. Ran fine, drove straight it was a blast. Get to work, park it, and all is great. Go to leave and I notice a puddle of coolant on the ground. Oh crap. Well I pop the hood, and sure enough the radiator tank has busted it's mount and was laying on the fan! It must have taken quite a hit because the top corner of the tank now has a hole. Driving home it was fine, until I hit stop and go traffic. The temperature would raise towards 220, then when I drove off it would shoot back down. Seemed weird, so I sat at home and watched the gauge go up a little past 220 and turned it off so it wouldn't do anymore damage!

So my question is, is the overflow tank pressurized and letting in air that may cause the giant change in temperature? Also, would the small puddle (about a food around) be enough to cause that big of a change? I'm new to the cooling systems on these, so any help would be appreciated.

relax....everything is normal....except your overflow tank needs replacing. 220 is nothing for these cars....and any slight motion forward will bring the temp down. If you hit 235, the radiator fan should turn on. The overflow tank is not pressurized.

[This message has been edited by Gall757 (edited 05-13-2015).]

Even that surge in the temperature? Sorry to freak out, but I had a dodge ram that did that, ended up with a blown water pump and radiator!

quote Originally posted by Gall757: relax....everything is normal....except your overflow tank needs replacing. 220 is nothing for these cars....and any slight motion forward will bring the temp down. If you hit 235, the radiator fan should turn on. The overflow tank is not pressurized.

Yep stock rad fan switch turns it on at 235 degrees.

You probly didnt loose enough fluid to have needed to even add any, if you did the overflow tank would show low.

[This message has been edited by 2.5 (edited 05-15-2015).]

if you get uneasy about it, you can kick your AC on and it will turn your fan on.