Subject: AC fix and correct R12 expansion valve? Author: cjarvis : member since February, 2010 : 49 posts Posted on: 2010-03-15 13:07:04

Morning guys...

I am pretty sure my slooowww AC leak is the expansion valve (has a drop of oil hanging from the bottom, and all the fittings under the hood are dry) Its a 5/85 build 745i, still running R12. Mobile Traditions/Maximillian's ( AC Part List ) says 64 11 1 363 581 is for pre 9/85 but doesn't specify R12 or R134. They also list 64 51 1 372 503 as after 9/85 with a note of R12. But if you order a 64 51 1 372 503 from the dealer, it has R134 stamped on it!?!? 64 11 1 363 581 is NLA from the dealer.

So I am thinking the Maximillian's R12 note on 64 51 1 372 503 is an error, and that 64 11 1 363 581 is the correct R12 valve. Searching on that p/n, this valve pops up and "looks" correct, but it doesn't say if its R12 or R134a:

E23 Expansion Valve But my guess is its the correct valve. What do you guys think?

Also, I thought I'd drain and replace the oil while the system is open. Does anyone know how many ounces? Any objections to this stuff: AC Oil

Thanks for any advice...

Craig

Craig in MI
85 M635CSi
85 745i
71 F-250

• AC fix and correct R12 expansion valve? (url) - cjarvis 2010-03-15 13:07:04 (398 views)
  • That is one of the COMMON leak points... - johnhstein, 85-M6CSi, 85 745i 2010-03-15 18:32:31 (346 views)
  • Re: AC fix and correct R12 expansion valve? - Hitmanx 2010-03-15 18:29:02 (731 views)
    • I agree.. r-12 if you can find it or - johnhstein, 85-M6CSi, 85 745i 2010-03-15 18:34:08 (321 views)
      • Great advice.. - cjarvis 2010-03-16 12:00:42 (311 views)
        • Re: Great advice.. - Hitmanx 2010-03-16 20:51:11 (332 views)
  • Re: AC fix and correct R12 expansion valve? - limeyexpat 2010-03-15 16:22:45 (327 views)
    • Al Gore will unleash ManBearPig upon you! (nt) - Vern 2010-03-15 20:51:52 (295 views)
      • Re: Al Gore will unleash ManBearPig upon you! - limeyexpat 2010-03-16 09:46:33 (297 views)
        • Its not Al Gore or Eric I am worried about... - cjarvis 2010-03-16 11:13:28 (320 views)
          • Re: Its not Al Gore or Eric I am worried about... - Hitmanx 2010-03-16 20:40:55 (360 views)
          • Be careful.. no methane discharges allowed... :-) (nt) - johnhstein, 85-M6CSi, 85 745i 2010-03-16 11:50:52 (329 views)