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Thread: Ac hot 1987

  1. #1
    Join Date
    Nov 2006
    Location
    West Des Moines, Iowa
    Posts
    328
    My Cars
    1986 635csi Schwarz

    Ac hot 1987

    Compressor seems to be working ok, r12 a little bit low but no love from the vents. It was mediocre a year ago, now no cold, just warm air. Mechanic friend thinks maybe exp valve, but looks like major dash disassembly to check. Any insight? Want to fix it before I sell

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    Steve
    '86 635csi black
    '16 535d Xdrive Jatoba Brown
    '62 AustinHealy Replica (w/350SBC)
    '71 Jaguar XKE 2+2

  2. #2
    Join Date
    Jul 2018
    Location
    Netherlands
    Posts
    292
    My Cars
    1982 628CSi
    Fill refrigerant to the specified level? When there is too little fluid the AC won't work properly, but, there is too little in there so you might want to do leak testing first with a contrast fluid. This will tell you where a leak can be found. You'll need to see a shop for this.

  3. #3
    Join Date
    Nov 2006
    Location
    West Des Moines, Iowa
    Posts
    328
    My Cars
    1986 635csi Schwarz
    Mechanic put guages on it, added dye and an old stock 12oz can of r12. Still warm. That's why he thinks it might be the expansion valve. I'd just replace it if I could. Looks like nearly the entire dash would have to come out to get to it. Im grasping for straws looking for anything else to try first.

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    Steve
    '86 635csi black
    '16 535d Xdrive Jatoba Brown
    '62 AustinHealy Replica (w/350SBC)
    '71 Jaguar XKE 2+2

  4. #4
    Join Date
    Feb 2009
    Location
    Pittsburgh, PA
    Posts
    1,718
    My Cars
    '86 635CSi, '08 128i
    Did you check the cabin air temp sensor in the dash kick panel? They rarely fail but the vac hose boot tends to fall off, sometimes it's disconnected from the intake manifold. I've also forgotten to plug it back in on occasion.
    Save the manuals!
    '08 128i 6MT, '86 635CSi 5MT (B32, Motronic 1.3, WBO2, G265, 18# FW, 3.46 torsen)
    Past projects:
    '96 318iS, sold 4/23 '90 535iM, RIP 1/23 '90 535iA RIP 6/22 '91 318i, sold 7/19 '97 M3 sedan, sold 11/18 '85 735i, RIP 2/18 '92 325iC, sold 7/16 '91 318iS, sold 6/16 '84 745i, sold 10/14 '82 633CSi, traded 9/12 '90 325i, RIP '87 325 sold '89 525i, traded '87 325iS, RIP

  5. #5
    Join Date
    Nov 2010
    Location
    Santa Ana, CA USA
    Posts
    984
    My Cars
    1988 m6
    Quote Originally Posted by smiller View Post
    Compressor seems to be working ok, r12 a little bit low but no love from the vents. It was mediocre a year ago, now no cold, just warm air. Mechanic friend thinks maybe exp valve, but looks like major dash disassembly to check. Any insight? Want to fix it before I sell

    Sent from my SM-N950U using Tapatalk
    Steve,

    You can still get a recharge with R12,
    I went to a local independent Bimmer dealer,
    They would only do it if they provided the R12, and they charged me $95.00 for each can,
    My m6 required two 8oz cans, of r12.
    The Labor was $150. + the 2 cans.
    I took my 2 cans of R12 with me that I had purchased on ebay, but they would not use mine.

    Best,
    Jay
    '88 M6 Cinnabar Red / Nappa Natur Highline Interior (10-87) Santa Ana, California. USA

    My NEW Website, Link : https://www.jaysbmwparts.com

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  6. #6
    Join Date
    May 2006
    Location
    Spokane WA
    Posts
    433
    My Cars
    89 635CSi, Nissan Murano
    If you have dual air inthe 87 I found with my 89 the only way to get the AC working right was they hadto completely evacuate the system and then a complete refill, now its workinggreat. For some reason with the dual units you can't "just add"refrigerant, it had to be drained and refilled. At least that’s the way it was withmine.
    SprCpe
    1989 635csi # 3268410
    Built in Germany with love.
    Ostatecznym maszyny jazdy BMW

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