|
|
|
12-07-2013, 01:38 PM | #1 |
Enlisted Member
12
Rep 45
Posts |
DIY: Replacing the AC Compressor
Hey Guys,
I am in the process of changing my AC compressor, and thought I'd try and document the process for others. I am using this as a placeholder for now, and also as a place to save my reference links. Once I am done I will put together the steps and fill in any gaps that I can with pictures of the process. Resources: BMW Manual - http://bmw.workshop-manuals.com/1_Se...ex.php?id=2527 Torque Spec References - http://bmw.workshop-manuals.com/1_Se...ex.php?id=3491 Cowl, microfilter, and airbox removal - http://www.e90post.com/forums/showthread.php?t=654820 Charge pipe removal - http://www.activeautowerke.com/pdf/A...ff%20valve.pdf Step 0: Have a shop evacuate your AC system and tell you how much oil you need to add back Step 1: Prepare Cowl for Removal 1a: Unclip the 6 clips holding the wiring over the engine - *Careful, these clips break easily (just ask the tech who broke 2 while doing work on my car.) 1b: Remove the 6 8mm bolts holding on the Pollen Micro Filter, and remove the filter and housing. 1c: Remove the 2 rubber tabs (1 on each cover) holding the ECU/ABS covers on. 1d: Unclip the plastic covers and remove them. (2 clips on each cover) Step 2: Cowl Removal 2a: Remove the 2 8mm bolts securing the cowl 2b: Remove the two electrical clips, and unhook the wiring from the cowl (just pull up on the clips) 2c: Remove the 2 rubber tabs. 1 on each side of the cowl 2d: Lift up on the cowl, then pull it out towards the front of the car Step 3: Remove the Airbox remove vacuum fitting (squeeze it off) and unhook the hose Remove front hose clamp with a flathead screwdriver unclip snorkel/scoops from airbox unhook (pull up) 3 rubber wire holders on the back of the airbox Unscrew the hose clamp (already undone in the photo, sorry) pull up on airbox. it is held on by 3 rubber grommets Step 4: Remove Air Intake Scoops 4 torx bolts Step 5: Remove chargepipe disconnect diverter valves (slide/twist the grey clips clockwise and the valves then just slide off). I hung these out of the way instead of disconnecting the vacuum line. use a flathead screwdriver and pull up on the raised part of the metal clip holding the pipe to the throttle body remove hose clamp on other end of charge pipe (flathead screwdriver) Remove the torx bolt securing the chargepipe unclip sensor wiring near the back of the throttle body (squeeze) Step 6: Remove Radiator fan remove 1 torx bolt on the top of the passenger's side unclip (squeeze) wiring harness on driver's side (top) unclip the wiring harness from the top of the radiator unhook clip near top/middle of the fan bracket on the driver's side unclip FMIC charge piping from radiator fan bracket unclip coolant hose on top of the fan bracket lift up very carefully Step 7: Loosen intake piping for more space to work remove 2 torx bolts holding the front turbo intake pipe to the block Step 8: Loosen coolant/AC lines for more space remove the coolant lines around the compressor from their holder's/clips to allow flexibility of the lines Unclipped the AC hose that runs in front of the engine to allow more room for removing the compressor through the top of the engine Step 9: Remove serpentine belt make note of the belt routing Insert the T60 wrench into the tensioner pulley and apply pressure to loosen the tension on the belt Slide the belt off the pulley and ease off the pressure on the tensioner pulley Step 10: Compressor Removal final prep Remove wiring clip from AC compressor (squeeze) remove the 2 torx bolts holding the coolant lines from their holder's/clips Step 11: Loosen 3 13mm bolts holding in AC Compressor One is hard to get to as you cannot see it from the top. It is directly below the top bolt on the front, and the same size. You can find and loosen it by feel. I was not able to remove the bolt from the hole entirely until I removed the compressor (I was able to loosen in 100% however.) Step 12: Remove the AC Compressor The bolt holes for the compressor actually sit on a little lip, so you will have to pull the compressor up about 1/4" to get it off this lip. Then you can free remove it. Once the compressor was off of the lip, I moved it to the front of the engine, and pulled it up between the engine and the radiator to remove it from the engine bay. Step 13: Replace the Drier It is cheap, so why not do it now too. Step 14: Start with step 12 and work your way backwards to install everything Step 15: Put a pump on the A/C for at least 1 hour, then charge the AC
__________________
N54 Powered 135i
Last edited by licwid; 01-09-2014 at 07:21 PM.. Reason: more info |
03-19-2014, 12:11 PM | #3 |
Pablo
40
Rep 263
Posts |
Other than the compressor, what parts did you replace (serpetine belt, belt tensioner, etc.) Also where did you find the best prices for these parts? Thanks
__________________
BMW PPK V2, M3 26mm sway bar, M3 front control arm kit, M3 steering wheel, BMW 313 wheels w Michelin PSS
|
Appreciate
0
|
07-26-2023, 09:25 PM | #7 |
Enlisted Member
6
Rep 48
Posts |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|