On a 91 civic ex, 4 dr, where is the coolant drain bolt located at? I am going to help my neighbor flush his system and want to drain the coolant from the block.

Thanks for the help.

 

The bottom of the radiator

 

Is there one on the block as well?

 

i think removing the drain plug on the rad. will get all the coolant out...

 

none on the block

 

Thanks for the help

 

yes there is a drain plug on the block. It is actually the block heater that you remove. I believe you use a 15/16" wrench to take it off.

Its a pain to remove since there is so little room to get in behind the exhaust manifold. If your car doesn't have a block heater then there would be a plug where the block heater would be located.