[JOURDAN]

Over the last 6 months, I feel I've have read every bit of information out there regarding automotive cooling systems as it relates to coolant reservoir, recovery, overflow systems closed and vented.

I found very little information that was helpful in understanding how these systems work IN REAL LIFE and how active they are and the volumes transferred.

First, Coolant Expansion: CTE (coefficient of thermal expansion)

Calculating CTE, you will find its an exact science and the only variable is slight difference between water vs coolant, for argument sake they are the same CTE. Besides coolant is 50% water anyway.

Our coolant systems holds 11.7 quarts. For every 100 degree rise celsius.

T(ºF) = 100ºC × 9/5 + 32 = 212ºF

The coolant will expand 7% this equals roughly .800 quarts @ 212 degree F

Second, Volume transfer and frequency:

Its exciting to finally see it working. What I found was its transferring fluid back and forth anytime the pressure changes.

This happens like a bell curve.

Cold..........................................Hot. .............................................Cold
1.....2....3....4....5....6....7....8....9....9... .8....7...6...5...4....3....2...........1

the numbers represent the amount of coolant transfer vs temperature.