Where would this be located? How easy/difficult would it be to unblock it?
I have the "Haynes Repair Manual" but it states "located the right center of the firewall" and ..."you can locate the drain by hand from above, behind the engine". Unfortunately I have no clue what I am looking for and is right-center passenger or driver side?
If you have any better advice and/or pictures, please advise.
TIA, Gary