Reverse flush the block?

[88ChevyMan]

This might be a dumb question, but can I jam a garden hose into the lower rad hose and flush the block out that way? Will that even do anything?

 

[Schurkey]

1. Pull the block drain plugs, BOTH SIDES. You may have to poke a screwdriver into the block drain holes to break the "crust" of settled sediment before coolant comes out.

2. It's enormously easier to flush using a heater hose. Get a "Flush and Fill Kit", follow the instructions.
www.amazon.com/Prestone-AF-KIT-Flush-Fill-Kit/dp/B000CCFY5W/ref=sr_1_1?crid=1YYQC6E14GG0Z

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3. Put the block drain plugs--which might be a knock sensor on the right side and a plain steel plug on the left, depending on which engine this it--back in when you're done flushing. The knock sensor requires a torque wrench and the specified torque.