Xoutpost.com - AC delay before cooling

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Quote:

Originally Posted by upallnight (Post 1052759)

The later days X5s with the variable displacement compressors uses a control valve, but he has a 2003 BMW which should still use the old compressor.

The variable displacement compressor with control valve was used in the e53 3.0i from October '2002.

Quote:

Originally Posted by deepblonde (Post 1052766)

The variable displacement compressor with control valve was used in the e53 3.0i from October '2002.

Perhaps in the Land Down Under they received the variable compressor in 2002,
But the regular compressor was used up to 2006 here in the States.

64526918000
Air-conditioner compressor
Weight:7.130 kgPrice:$1174.35

Part 64526918000 was found on the following vehicles:
X5 E53 (08/1999 — 09/2006)

Quote:

Originally Posted by upallnight (Post 1052771)

Part number 64526918000 IS for a variable displacement compressor with control valve!
RealOEM.com - Online BMW Parts Catalog
See under notes? "From 10/2002"

And cross reference- see USA:
RealOEM.com - Part Search

And info on variable displacement compressors as fitted to e53 X5, note the part number: 64526918000 .
BMW A/C Compressors: February 2013

Quote:

Originally Posted by DanSanDiego (Post 1053495)

I tried the Ice 32, but couldn't get much of it to go into the system. The symptoms haven't changed. I can get the system to start cooking the air by revving the RPMs above 3,000 (while in park or neutral) otherwise the AC takes 10+ min before it gets cold. With Fall starting I've got time to research this and may just end up replacing the compressor in Spring. Note: When the AC is cold it is very cold (40 degrees coming out of the vents).

If the AC is very cold like you say suddenly after revving the RPMs above 3000 rpm, then that sounds like the control valve.
They can be modified to work differently;
But if you don't want to risk buying a new compressor and having the same problem all over again, you can try this, just to get by:
If when driving the X5 above 3000rpm, it doesn't work, it's because the ECU won't allow the compressor to cut in with full throttle or an aggressive throttle position.
So , when driving and you want to force the valve to work without waiting 10 minutes, shift the transmission to manual, drop it down to increase the RPMs to about 3500rpm, without flooring it; cruise for at least 30 seconds until you feel the cold air, then back to auto mode, and it'll be fine until your car sits overnight.

Quote:

Originally Posted by DanSanDiego (Post 1054219)

Has anyone changed the compressor control valve (sometimes called refrigerant control valve - rcv)? I can get lots of pictures of the valve (part # mt2280) but I can find any pictures or details about its location on (or in) the compressor.

Control valve can be replaced, but you have to remove compressor anyway.
Here is a thread about similar delayed a/c...
http://www.xoutpost.com/bmw-sav-foru...-ac-delay.html

Quote:

Originally Posted by DanSanDiego (Post 1054219)

Has anyone changed the compressor control valve (sometimes called refrigerant control valve - rcv)? I can get lots of pictures of the valve (part # mt2280) but I can find any pictures or details about its location on (or in) the compressor.

If I had to guess I would say that it is located underneath the bolt next to the black connector.

http://i.ebayimg.com/images/g/K4sAAO...Fx/s-l1600.jpg

Here's a Youtube video on where the valve is located and how a variable displacement compressor work.

https://www.youtube.com/watch?v=BVPgFUfM2R0