Originally Posted by peeweeXJ
Pulling the lower radiator hose should be just as effective.
The block drain is not an easy thing to get to...or remove. It's not a hex head, nor an allen, nor a torx. It's a 5/16" SQUARE plug. Since there is no readily available square
wrench socket. You have 2 options.
Use a 3/8 ratchet extension (that you don't need) and grind all four sides down to make it 5/16 til it fits, then remove the plug and when you're done replace it with a regular hex head plug...
#@&! IT...just pull the lower hose, there will still be about 1-2 cups of coolant in the block, then stick a garden hose in the lower part of the water pump to get MOST of any sediment out...MUCH easier and almost as effective.
...and when you ask "why'd they do that"? Because it was easier for them