Yes, Victek, the Elantra is one of THE simplest vehicles to change the radiator fluid I have ever seen. The "petcock" is a red plastic bolt at the bottom of the radiator. Once you look, it is hard to miss.
Make sure the car is cold, open up the radiator cap before you open it, and let it pour. While it is draining, remove the coolant recovery bottle, drain, clean, replace and refill it.
If only other vehicles were that easy.
<BLOCKQUOTE type="cite">I have a 2003 Elantra GLS and I'd like to
change out the antifreeze. Unfortunately I'm having a weird problem
where I cannot get images to display in hmaservice.com so maybe you
can help? Does the radiator have an accessible, standard drain
valve? Are any special tools needed? <BR></BLOCKQUOTE><BR>If the
pictures don't show, you have to download the viewer. Look at the
Site Requirements for the viewer available for free from Adobe.
You also need Internet Explorer <BR></BLOCKQUOTE><BR>Yes, the SVG viewer
appears to install successfully and I am using internet explorer, but the
graphics still don't display on hmaservice.com. I'm not sure what to
do next. Meanwhile regarding the Elantra, do you know how to drain
the radiator? <BR></BLOCKQUOTE>
<DIV><FONT face=Verdana>Bottom of radiator, driver side, really dark there,
get a flashlight, use big phillips head screwdriver.</FONT><BR></DIV>
<DIV><FONT face=Arial>Are we talking about a large red plastic Phillips
screw head that flush with it's socket? (It looks to be in the right
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Regarding the issue of the SVG viewer and the
HMAservice.com I have installed the viewer on three computers so far - one
with Vista and the other two with XP SP2 - and the graphics will not display
properly on any of them. If someone has a clue about how to fix this
please speak up.</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>