You have an 89 Civic, right? Depending on what specific model (automatic or
manual; Si or not; EX or not; hatchback or sedan) you own, you'll need 1.175
gallon to 1.3 gallon to refill the system. Chilton's gives the exact number
for a specific model.

<mmdir2005@yahoo.com> wrote
> I don't know silicated or long life in my radiator. The new gallon
> I've bought at local Honda dealer
> is pre-mixed dark orange Type 2 coolant.
snip
> I'm going to replace water pump and coolant anyway...do I need
> an another gallon of
> coolant for draining & flushing & refilling?
>