Radiator Drain on 99 Concorde?

Where is the drain plug/petcock for the radiator on a 99 Concorde?
There is an unanswered question regarding this on the FAQ page. If any
one knows, please respond here. Thanks

 

I believe on that model it is located on the inside radiator at the
passenger side corner.

Glenn Beasley
Chrysler Tech

 

Yep - and they are a PITA. Many start leaking or people can't get them
to drain and over-turn them and end up having to replace them. They
also are in a very difficult spot to reach (as on most cars these days).

My understanding is they turn CCW a little over 90° and pull out just a
little to start draining. I couldn't get mine to start draining, and
learned later on the 300M Club forums that they have to come out a
little after being turned. Also the o-rings go bad on them. I ended up
just flushing thru the radiator hoses. Will probably do the same thing
again next time to avoid damaging it or the o-ring start leaking. Very
poor design.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

 

thanks, Guys. I will look for it in that location the next opportunity
I have.

That turn and pull type petcock is vintage chrysler. I would have
thought they would have gone to something better and more reliable by
now, but I guess not. Thanks.

 

What normally happens when you try to turn the pet cock is the seal (o-ring)
rips inside and you don't realize that it has until you go thru the trouble
of trying to bleed the air out. Looking down you see coolant dripping out.
Now you have to drain it again and replace the valve (o-ring).
What I do is soak the valve with a good penetrating oil and as you turn
(counterclockwise) pull out on it until it starts to flow. The other thing
to do is purchase a new valve and replace it at the same time. The part
number is 4758290, probably about 10 bucks

Glenn

 

I do what Bill does and carefully pull the lower radiator hose to flush on
all my Chryslers.

Bob

 

You pretty much have to pull the radiator out to have enough room to
replace the drain valve, don't you Glenn? I've not done it - but that
appears to be the consensus on the 300M Club forums. Perhaps if you're
into the timing belt. etc., that would be a convenient time (along with
the accessory belt tensioners, etc.).

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

 

There are so many different locations for the pet cocks on all of the
models. Off hand I cant remember which ones have to have the radiator loose
until I look at em.

Glenn

 

i have this cool tool from airlift company and i hooks it up to a air source and
then the raditor cap and it pulls all the coolant out and when the systen is under
vacumm pulls the new fluid in

 

Not as thorough a flush as manually flushing, but when you have to make
a profit, that would be better for the shop with labor costs, so-called
"environmental" concerns, etc.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')