<Could it be the pump ?>

Nope! The problem is misinformation. 220' is well within normal operating temperture. They have been running at this temperature long before anyone around here--except me--or any other internet site was interested in these cars.

Based on another post about engine heat, it's obvious that no one has a clue, so I will explain why some vehicles boil @ 220' and others don't. The ones that boil have defective cooling systems.

It's based on simple physical laws: The boiling point increases with temperature pressure. The cooling system, depending on what you have for juice, should hold up to about 265' without boiling, with 240' to 245' boiling point as adequate.

In other words, if it boils at temperatures below 240', it's because the rad isn't maintaing adequate pressure. The only relation to overheating is the obvious problem with the rad running dry.

Then again, you have to keep in mind that my goal, unlike others, is to try to phuck your car up as bad as possible, so you may want to listen to smoneone who givesashit.