2/24/2023 0 Comments Ac compressor clutch![]() ![]() And that it has a variable solenoid or valve internally to adjust ac pressure. I thought the x5 didn't have an ac clutch. Can somebody confirm on their vehicle if this is normal? It very well may be, but I'm used to vehicles that when you turn off the AC button, it kills the compressor entirely. The clutch on this appears to only be disengaging with the entire HVAC unit turned OFF (aka no lights or anything on). My testing before this job showed 10-11 volts at the clutch with the HVAC unit on and AC button OFF but I'm not sure if this should be enough voltage to lock the clutch. HOWEVER, I have noticed that anytime the HVAC panel is "lit up" - even with the AC button OFF - that the clutch spins. After getting this back together the AC works perfectly again. I also did a new serpentine belt, tensioner, and idler pulley while I was in there. Here's the pulley installed (prior to grinding) as well as a comparison picture of the race height:Īfter all that I was able to get it together. So I pulled the clutch back off and used the old shims and got the clutch spaced to about what "feels" right. This all caused it to align fairly goofy and the shims provided with the new kit weren't enough and practically locked the clutch to the pulley when I tightened the bolt down. I ended up taking a Dremel and grinding down the inner race flush to the bearing seal and this just barely gave me enough room to get the clip in. I got to comparing the two pulleys and you can see the inner race of the bearing on the aftermarket pulley is significantly "taller" than the OEM. Thankfully the new pulley slid right on, but when fully seated did not leave enough room for the retaining clip to go in. I also ran into trouble with the pulley install. Getting the new stuff on was much more difficult retainer clip wise than taking the OEM stuff off. I resorted to using my cell phone in my other hand on the video screen to try to line up the snap ring pliers with the clips and it still was a nightmare. I have to say, messing with these retainer clips blind was a huge headache. Look how little clearance there is between the radiator: ![]() Thankfully I had a pully puller that fit. I rented an AC clutch removal tool from O'Reilly's but not all that unsurprisingly it didn't fit. Here's how much space we're left with after fan assembly and plastic duct removal: Looks peaceful sitting here but this fan assembly was very annoying to get out: Onto the very tight, very annoying work of replacing the clutch/coil ON the vehicle.įought the fan assembly out. ![]() With the HVAC unit on and AC button ON, the compressor power wire was getting ~14 volts and no AC clutch engagement so this confirmed to me the clutch/coil was the culprit here: With the HVAC unit on but AC button OFF, the compressor power wire was getting 10-11 volts (little odd, but I'm not sure how complicated the BMW AC circuit is): I could see space was tight and likely going to be a pretty annoying job so I did some testing with my multimeter before I started. Long story short I did get this fixed and only cost me $48.03 but I do need a favor if somebody doesn't mind looking at their X5 for me? More on that later. The only part I could find for this was an aftermarket on eBay from seller "coldfusionacparts" and brand name CoolTech MPN 574. Magically, the entire compressor is always bad with any AC problem lol.Īnyway, despite not finding a whole bunch of info on this error message I took a chance on a new AC clutch and coil assembly. I did find some threads/people with this same situation who all ended up replacing the entire compressor - which is par for the course with a shop. Being BMW, what little info I could find online from owners just resulted in tAkE iT tO tHe DeAlEr responses, but I'm not sure what the point of forums and communities are if that's the answer to everything. Well, nobody replied here and couldn't find much information online about this. ![]()
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