I've raised the right rear corner of my Fiero (2.8) to do a gravity fill. I find i can get the fluid into the thermostat fill pipe and heater extension line pretty well at the angle I have the car.

So well in fact, that the fluid is completely filling the overflow/expansion tank up front of the car (to the point it overflows!)? Now I thought that the pressure cap on the radiator would not allow this to happen without pressure in the system.

Am I mistaken?

sounds like you have a bad cap.

Make sure you read this about the proper type of cap to get: http://home.comcast.net/~fierocave/coolcaps.htm

[This message has been edited by seajai (edited 12-10-2013).]

I had that happen to me. A new cap fixed that.

yep, x3 you have a bad rad cap.

Either your radiator cap is faulty, or you have the wrong cap.

Some of the parts catalogs list a vented cap for the Fiero. But that's a typo. The Fiero needs a non-vented cap. You can read about that here: http://home.comcast.net/~fierocave/coolcaps.htm

Thanks folks,

That has to be it. A soon as I can get to the car I'll check.