5kcstq coolant capacity?

[Wallace White <wallace@remdesign.com>]

How much coolant does a 5kcstq hold? The Bentley never talks about
capacity per se but does list quantities needed for a given
concentration, and they add up to 16.8 US pints, or a little over 2
gallons (7-1/2 liters or so). 

I've drained and filled the system a couple of times now as directed by
the Bentley, removing the cap, disconnecting the heater hose at the
block (the hose with the heater valve in it, right?), and removing the
lower radiator hose. Each time, it takes about 8 pints--1/2 of what I
expect--to refill it. What gives?

- Wallace
  '87 5kcstq 151k