There’s some preventative measure for the oil pump nut, but I’m not super familiar with it
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You can check it to see if it's loose. If it's not, leave it alone.
If it is loose, take it off clean up the threads, make sure there is no oil on the threads and use Loctite red on it.
Chances of it being loose are pretty slim
Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
H&R sport springs, UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers
Emma - 2005 BMW 330ci ZHP 6MT Estorilblau Individual
Sportline 8s 18x8.5F - 18x9.5R | APEX ARC-8 18x8.5 Square | aFe Intake | 135i Brembo F/R Calipers | 26mm Front/20mm Rear Sway Bars | Z4 Mirror
M3 Dead Pedal | Lexus ES300 Yellow Fog Light Retrofit | Koni Yellows/H&R Springs | Llumar CTX 40% | Coby Tri-Stitch Wheel & Boots
Awaiting Install: M3 Wing Mirrors
Just got finished installing a new AC condenser, receiver, schrader valves and expansion valve, as well as new o-rings. The bolt holding one of the ac lines to the double pipe thing that goes to the expansion valve snapped in half while I was trying to remove it. Spent 2 days trying to remove the broken bolt from that double pipe thing using everything I could think of. Torch, penetrating spray, vice grips, extraction bits, drill, but nothing worked. That bastard was practically welded in there. So I went and bought the pipe from a guy parting out his e46 for $10 and called it good. Put the AC back together, vacuumed it, then put in new freon, just to learn that it still isn't working. Compressor engages, but doesn't seem to pull pressure from the low side to the high side. I give up. Gonna let a shop handle this. I just hope it's an easy fix and not gonna require a new compressor...
~ 2005 330ci ZHP Silbergrau | Black cube | Leather ~
Current Mods: Akebono brake pads, Bilstein B4 Rear Shocks, Beisan Systems VANOS Rebuild, G.A.S. DISA O-ring, Morimoto fog lights, StopTech SS brake lines, Subwoofer tennis ball mod, Switchback Angel Eyes (turn signal), Zimmermann drilled rotors.
My project thread ---> http://www.zhpmafia.com/forums/showt...into-a-reality
Was there oil in the system? It needs that. Also the compressors have a habit of leaking...
Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
H&R sport springs, UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers
Emma - 2005 BMW 330ci ZHP 6MT Estorilblau Individual
Sportline 8s 18x8.5F - 18x9.5R | APEX ARC-8 18x8.5 Square | aFe Intake | 135i Brembo F/R Calipers | 26mm Front/20mm Rear Sway Bars | Z4 Mirror
M3 Dead Pedal | Lexus ES300 Yellow Fog Light Retrofit | Koni Yellows/H&R Springs | Llumar CTX 40% | Coby Tri-Stitch Wheel & Boots
Awaiting Install: M3 Wing Mirrors
~ 2005 330ci ZHP Silbergrau | Black cube | Leather ~
Current Mods: Akebono brake pads, Bilstein B4 Rear Shocks, Beisan Systems VANOS Rebuild, G.A.S. DISA O-ring, Morimoto fog lights, StopTech SS brake lines, Subwoofer tennis ball mod, Switchback Angel Eyes (turn signal), Zimmermann drilled rotors.
My project thread ---> http://www.zhpmafia.com/forums/showt...into-a-reality
If the system is vacuumed, sealed, and properly charged and still not "compressing" or getting a high/low pressure difference, my bet is on the compressor being bad. They need oil for lubrication PAG oil usually, though it can vary between compressor models. How many miles on the car/compressor? Do you use the auto mode on climate control settings all the time? This seems to make the compressor run heavily in my experience.
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-Brettski
At this point the compressor is the only culprit, I just hope it's a relatively easy fix. Almost 90k on the car now, but I bought it at 84k, and AC was not working back then either. I have not used the AC for that reason, so I never really fiddled with the climate control. One shop already told me the compressor was fine, but I think they based this on the fact that the clutch engages, and it does not make any funny sounds.
~ 2005 330ci ZHP Silbergrau | Black cube | Leather ~
Current Mods: Akebono brake pads, Bilstein B4 Rear Shocks, Beisan Systems VANOS Rebuild, G.A.S. DISA O-ring, Morimoto fog lights, StopTech SS brake lines, Subwoofer tennis ball mod, Switchback Angel Eyes (turn signal), Zimmermann drilled rotors.
My project thread ---> http://www.zhpmafia.com/forums/showt...into-a-reality