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Low side AC port on 1986 M635?

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milroy
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Location: England, UK

Low side AC port on 1986 M635?

Post by milroy » Thu Jun 02, 2016 12:47 pm

Does anyone know where the LOW pressure air conditioning refill port is on a 1986 M635?

I've located the HIGH under the large washer bottle but the LOW isn't in the same place as a 635...

GRNSHRK
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milroy, gonna move your thread . . .

Post by GRNSHRK » Thu Jun 02, 2016 4:21 pm

...to the mechanical section, where it will be seen and addressed more appropriately :lol:
:mrgreen:
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milroy
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Re: Low side AC port on 1986 M635?

Post by milroy » Thu Jun 02, 2016 5:47 pm

Its okay after a day of head scratching and research it appears the PO changed the low pressure AC hose for one WITHOUT a port...less than ideal, you got to love a tryer ](*,)

Thanks

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Da_Hose
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Re: Low side AC port on 1986 M635?

Post by Da_Hose » Thu Jun 02, 2016 6:47 pm

Yeah, that stinks. Now you can only test with the low side port before the regulator. That doesn't tell you the real low side pressure being seen by the pump, though.

Jose
1987 M6 - My dream car

milroy
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Re: Low side AC port on 1986 M635?

Post by milroy » Fri Jun 03, 2016 6:37 am

I'm looking for the correct replacement hose on RealOEM, however it comes up with the standard hose (approx 45 degree connection to compressor) whereas I require the unique M635 hose with closer to 90 degree radius.

Anyone know the part number?
AC hose.png
AC hose.png (194.52 KiB) Viewed 1994 times

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dwcains
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Re: Low side AC port on 1986 M635?

Post by dwcains » Fri Jun 03, 2016 6:44 am

Have you checked with an A/C shop about having a hose custom-made. I have a non-original compressor and condensor on my car, and it was inexpensive and simple to have new hoses made.
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johnn635
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Re: Low side AC port on 1986 M635?

Post by johnn635 » Sun Aug 06, 2017 10:46 am

I know this is an old post, but I am searching for all info on M635 air con, and compressor/R134A conversion. My M635 June 86 has the pipe with the low pressure port and a 45 deg bend. This is correct for the M635 with the Bosch/Behr 'wing cell' compressor. I suspect the PO changed the pipe because so far as I can tell, a brand new OEM pipe stll uses a non barrier hose. My old pipe I intend to use the fittings from if there is any evidence of leaking. Barrier hose is easily available from the same people - Codan - who make the OEM part.
John

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