MustangWorks.com : Ford Forums - View Single Post - Why is the Coolant in reservoir boiling over.

magicmerll · 07-30-2002, 04:21 PM

I was really hoping someone was going to mention that!

Try a radiator cap.

The cap is designed to hold pressure in the radiator. The more pressure water is under, the higher it's boiling point. If your cap is week, your boiling point is low, possibly as low as 212 degrees, the normal boiling point for water. It is not uncommon for an engine to run this temp., therefore the pressure cap is necessary.

Your water is simply boiling because it's hot, not because of some supercalafragalistic cylinder pressure. Who ever heard of 5.0 blowing a head gasket anyway? Come on guys...

07-30-2002, 04:21 PM	#9
magicmerll Registered Member Join Date: May 2002 Location: St. Louis, MO Posts: 19	I was really hoping someone was going to mention that! Try a radiator cap. The cap is designed to hold pressure in the radiator. The more pressure water is under, the higher it's boiling point. If your cap is week, your boiling point is low, possibly as low as 212 degrees, the normal boiling point for water. It is not uncommon for an engine to run this temp., therefore the pressure cap is necessary. Your water is simply boiling because it's hot, not because of some supercalafragalistic cylinder pressure. Who ever heard of 5.0 blowing a head gasket anyway? Come on guys... __________________ Ever notice the people that know the best way to raise kids are the people that don't have any?