I have recently ordered a new expansion valve, drier and the two leads on the drier for the aux fan for my 420sel. i intend to replace them and cure my leaky a/c once and for all. My question is that when i replace these items do i need to by some sort of o rings for them or do these parts come with them or even need them. the expansion valve looks like a PITA so I dont want to do it over again and i cant afford to throw away 150 dollars worth of r12. thanks for any replies

__________________
1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual

I had to get my own o-rings... it seems like i ordered some extras as well.

the expansion valve is a PIA...i thought it would be impossible to do on a
w124...it just took a lot of patience...a lot of patience

you will swear you can't get the wrenches in there..but you can.

__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]

On the 124 it can help a lot to remove the black plastic trim pieces above the expansion valve.

The new drier will probably have plugs with o-rings underneath. Should you use them? Probably not, if you remembered to order new ones.

__________________
2012 E350
2006 Callaway SC560

so all three items need o-rings purchased separatly?

__________________
1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual

New o-rings for every part that you replace is always a good idea in MVAC.

These guys are near you and know their stuff. Go there and ask for what you need. They'll have it.

http://www.caawparts.com/index.asp?Page=Home

__________________
The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

thats funny because i bought this car from one of the managers at that company and he didnt even fix the leak before he sold it.

__________________
1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual