Reply to "Help Needed - Cooling System problems"

Thanks guys.

Any thought on if the old pressure cap shown above IS in fact a GM part? How can I tell if my car has the replacement US style neck (as I suspect). I want to eliminate a leaky cap but not by replacing it with an incorrect unit.

Also, when my car warms up, the coolant level in the swirl tank slowly rises. It isn't more than 1/2" from the top (where the rubber seals it) when the car is cold so it overflows fairly soon (5 min?). Should I start with a lower level? My overflow tank is full now, judging by how often it is puking coolant when the engine gets hot.

How high should the ends be raised when doing this. I have them about a foot. Is that too high?

I will try the "burping" again. I did read the excellent sticky you wrote George (thanks for doing that for us!) and I plan to do that mod as soon as I can.

Thanks,

Mark