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#31
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
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#32
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Quote:
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#33
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What missing after 4 pages on this problems beside the pic of the "Hot Wife" is the low and high side readings of the system. Unless the OP can provide us with this info, my advice is to take it into a AC specialist. Better than just throwing parts at the problem and hoping that will fix it.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#34
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That's not a lot of miles and would definitely be an early compressor failure.
Even if your fan was to blame the aircon would still be cool at highway speeds. So I'd be leaning away from the fan itself as the cause for no cooling. Quote:
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
#35
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If it's a variable valve that always spins, does that mean there would be no shim to ad or remove to adjust the air gap as that's a clutch related part? I'm probably going to tear into mine today if there's a possibility of me being able to fix it like that, otherwise I'll probably have to bite the bullet and get a new compressor. I know my aux fan and hvac panel are fine and not the problem. Is therr anyway to clean out the valves in the compressor, like if they're getting stuck and that's why they intermittently work?
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2006 X5 3.0i 2000 323i R.I.P. |
#36
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#37
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Ok, a little update. I checked and it is a variable displacement compressor, but it has a clutch. It's an internally regulated, aka by pressure and not by electronics. I also checked and contrary to what I believed, the clutch was not spinning when the ac was off, but it does engage and spin up each time with the ac on. It looked like it, but I put my hand down there and it does engage/disengage.
Still no cold AC though. My aux fan does come on if I disconnect the pressure, but doesn't always come on when I have the ac on, only if it's working. Could this possibly be a bad pressure sensor for the fan? I also read that some people have experienced if you rev the engine over 4k it kicks on and starts working. I'm in the car in my driveway as I'm typing this. Right now I reved the engine over 4k and almost instantly it went icy cold and the aux fan kicked on. So what is going on?
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2006 X5 3.0i 2000 323i R.I.P. |
#38
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But I'd be apt to replace the compressor if all else seems good. Same with the expansion valve and receiver dryer. At the mileages these things are getting to I replace all sorts of stuff whether it's broken or not since parts (in at least some cases) will start to fail.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
#39
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So I did some searching and found that the kicking on at 4k rpms symptom was likely due to low pressure in the system. Our variable displacement compressors use the refrigerant pressure to regulate the displacement of the compressor. This makes sense then. Low pressure would make it not adjust to the right displacement to cool. Revving the engine to 4k would spin the pulley and clutch faster and increase pressure enough for it to work.
So I went to the store and bought another can of r134a. When I started filling it up, the aux fan revved up really high like if I pulled the plug. I filled it up to about 43psi and it seems happier like this in terms of kicking on, but it still isn't really cold like I'm used to, that seems to come and go. Perhaps it needs to be fully purged and then fly charged to spec with both high and low side gauges instead of just using a low side gauge/filler combo. I'm going to see about renting a set of gauges from Auto zone to get it really tuned in, but I think the problem here was definitely the pressure of the system since the clutch was engaging with the ac on and the aux fan was working. I'll update, but this may be our problem, possibly because we're not used to working with variable displacement internally regulated compressors. Older cars had a fixed displacement compressor, which was much simpler and as long as the clutch engaged it would pump. These require a set pressure to determine the displacement and how much to pump on top of it. Edit: drove it a bit. It seems to be doing better, especially while moving. I checked the pressure again. When filling it, it was shaky and would go between 43 and 55 as the compressor cycled. After driving and checking it again it's sitting solid at 37psi. I'll see how it acts after it sits for a few hours. That seems to be when it's had problems kicking on.
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2006 X5 3.0i 2000 323i R.I.P. Last edited by phathom; 05-26-2017 at 02:35 PM. |
#40
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At idle a variable displacement compressor is hardly pumping any refrigerant (AKA Freon) so there is less load on the engine. When the engine is revved up or at high rpm the the variable displacement compressor knows this so it increase the displacement in the compressor by varying the angle of the rotor that is used to move the pistons. This increase in displacement allows more refrigerant to be pumped through the system which in turns create a greater cooling effect (AKA Air Conditioning).
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
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