FJsixty2 said:i'm wondering about this '5 gallon' capacity myself. i just finished the same procedure (new upper and lower hoses, new thermostat, new radiator cap, gaskets, drain plug, 'T' in the inlet hose, full flush, etc.) and i was only able to get 2.5 gallons (10 qts) in the system, so far. the FSM calls for 20+ qts and i'm not seeing it. i have already filled it (with 'T' off), run for 10 minutes and topped off and that's what got me to 10 qts. is this what most people find they take? i did a full drain of the radiator after the flush.
The 20 quarts is with the block totally drained. Removing the lower rad hose won't drain the block. 10qts is fine for a flush and refill.