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  #1  
Old 01-01-2020, 12:32 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Broken compressor pulley on N62

Hey everyone. I misdiagnosed a bad pulley last week. Found out today that it was the compressor pulley that went. Some metal shavings stuck to the old oil on the block so Iím guessing the bearing grinded until failure. The pulley wobbles back and forth freely but everything else looks intact. What kinda job am I looking at? Just replace the pulley portion? I have never worked on a compressor except to install belts. Realoem was not very helpful for identifying parts of the compressor and I canít find much in newtis. Help appreciated. Video below.





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Old 01-01-2020, 01:45 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Looks like I will just replace the pulley as a whole since the compressor appears undamaged. If anyone has any advice or warnings please let me know. Seems pretty straight forward (unbolt old, bolt on new with loctite) and accessible from the top. Click image for larger version

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Old 01-01-2020, 03:03 PM
twh twh is offline
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There is a thread on E70 or E60 with someone who has a pretty detailed DIY with pictures. Maybe a year or two old.
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Old 01-01-2020, 03:09 PM
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This one:
https://www.bimmerfest.com/forums/sh....php?t=1119121
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Old 01-01-2020, 05:33 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Quote:
Originally Posted by twh View Post
There is a thread on E70 or E60 with someone who has a pretty detailed DIY with pictures. Maybe a year or two old.



Thanks TWH. He attempted the bearing replacement first. I think Iíll just replace the whole clutch pulley with the bearing installed. Looks like 3 small bolts, one center bolt, and whatever that thin metal locking piece is. Looks accessible from the top. Hoping itís that simple.


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Old 01-02-2020, 02:10 AM
deroy deroy is online now
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Broken compressor pulley on N62

Quote:
Originally Posted by BabyUnicornTaco View Post
Thanks TWH. He attempted the bearing replacement first. I think Iíll just replace the whole clutch pulley with the bearing installed. Looks like 3 small bolts, one center bolt, and whatever that thin metal locking piece is. Looks accessible from the top. Hoping itís that simple.





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Pulling (half?) a (broken?) bearing off the compressor front face is never simple. I guess we all know that 'loosen bolt, remove part' in reality easily turns into a weekend long session of hammering, swearing, bruised hands, and a few trips to the hardware store. So. May I suggest to have a bearing puller ready, be ready to have to loosen the compressor to create (more) space. And keep the car in driveable condition, in case it all goes horribly wrong and you capitulate to your Indy.

Last edited by deroy; 01-02-2020 at 02:34 AM.
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Old 01-02-2020, 06:09 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Quote:
Originally Posted by deroy View Post
Pulling (half?) a (broken?) bearing off the compressor front face is never simple. I guess we all know that 'loosen bolt, remove part' in reality easily turns into a weekend long session of hammering, swearing, bruised hands, and a few trips to the hardware store. So. May I suggest to have a bearing puller ready, be ready to have to loosen the compressor to create (more) space. And keep the car in driveable condition, in case it all goes horribly wrong and you capitulate to your Indy.


Thanks. Iíll pick up a bearing puller from harbor freight and keep it on hand. One as low-profile as possible. Good idea. This is new territory for me. I may break this down into a few steps to keep it drivable at all times.

1. Remove the pulley and see if the bearing is seized.
2. Hope I have enough room for the bearing puller if the bearing is seized.
3. Compare the old pulley parts to new ones ordered 4. Install.
5. Replace both belts.

I think I can stop at any of these steps and the X5 will be drivable. I really hope the bearing is not a big issue to remove. Iím lucky itís winter and I have some time.


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Old 01-11-2020, 08:32 PM
BabyUnicornTaco BabyUnicornTaco is offline
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I picked up a bearing pulley set in 3 different sizes from harbor freight. Iíll see what fits. This is the next project.


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Old 01-12-2020, 03:58 PM
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Broken compressor pulley on N62

I want to be prepared for this job but Iíve never worked with a bearing, seized or not. In my head I expect to pull off the clutch and find the pulley just dangling with the bearing still attached to some sort of shaft. Does this sound like what I should expect? If so is my best case scenario to use a bearing pulley and remove the old bearing before installing an entire new pulley and clutch? This is my thinking because the only thing that is not functioning is the pulley itself. It just wobbles completely loose. Trying to avoid a complete compressor replacement.


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Old 01-12-2020, 08:29 PM
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It is very rare that a bearing falls completely apart. More often, the bearing race and/or one or more of the balls, begins to spall. That's just a fancy way of saying that the hardened surface of the race and/or the ball has some wear and becomes rougher and may even lose material. It almost looks like flaking of the metal surface. When that happens, the free material now mixes with the lubricant and makes an abrasive paste and makes things worse. The bearing puller grabs around the inner race, just off the shaft. When you pull the out, the inner race comes out and the outer race with it. I'm sure there are youtube videos on using a bearing puller. Another thing you can do it use a Dremel to cut the outer race off, pull the balls out and the cut the inner race off. The main problem of using the Dremel on the car is the debris it creates and your ability to keep it from fouling something else nearby. Sometimes it is ok and sometimes not.
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Old 01-13-2020, 03:59 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Broken compressor pulley on N62

Quote:
Originally Posted by twh View Post
It is very rare that a bearing falls completely apart. More often, the bearing race and/or one or more of the balls, begins to spall. That's just a fancy way of saying that the hardened surface of the race and/or the ball has some wear and becomes rougher and may even lose material. It almost looks like flaking of the metal surface. When that happens, the free material now mixes with the lubricant and makes an abrasive paste and makes things worse. The bearing puller grabs around the inner race, just off the shaft. When you pull the out, the inner race comes out and the outer race with it. I'm sure there are youtube videos on using a bearing puller. Another thing you can do it use a Dremel to cut the outer race off, pull the balls out and the cut the inner race off. The main problem of using the Dremel on the car is the debris it creates and your ability to keep it from fouling something else nearby. Sometimes it is ok and sometimes not.


What you are saying makes sense. I have the tiniest of metal flakes around this area. They have stuck to old oil. Iím not against a shop doing this but if they screw up itís such an easy out for them to say ďyou need a new compressor.Ē At least since the pulley has completely detached I think I should be able to get a close up of the bearing soon, once I get the front plate off. I fully believe the compressor itself remains fully functional. This is the bearing puller set I purchased. https://www.harborfreight.com/three-...-pc-63953.html


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Last edited by BabyUnicornTaco; 01-13-2020 at 04:01 AM.
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Old 01-13-2020, 08:46 AM
twh twh is offline
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What you have there are called three jaw puller. They are typically not going to be able to be used for what you need. The reason is that you need to get behind the bearing and there will not be enough room to get this in there.

You will most likely need one of these two:

bearing separator:
https://shop.harborfreight.com/media...3/63662_W3.jpg

3 jaw bearing puller:
https://shop.harborfreight.com/media...mage_17892.jpg

The idea is the separator is thin enough to get behind the whole bearing. You close it down enough to get a firm grip around the inner race, but not enough to marr the shaft.

The 3 jaw bearing puller works like a regular 3 jaw puller, but the jaw teeth go inside the bearing between the inner and outer race and hook onto the inner race.
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Old 01-13-2020, 09:19 AM
deroy deroy is online now
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Címon babyunicorn, leave the keyboard and get to work


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Old 01-13-2020, 10:35 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Címon babyunicorn, leave the keyboard and get to work


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Need to get the separator and correct bearing puller first. Iím still a few days away from getting the opportunity. No one is more anxious about it than me!


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Old 01-13-2020, 10:47 AM
deroy deroy is online now
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Assuming you have a second car, I would take the pulley off first and then see what tools you need.


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Old 01-13-2020, 10:52 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Assuming you have a second car, I would take the pulley off first and then see what tools you need.


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I plan on doing that. Nothing is spinning right now anyway so I could take the pulley off and still drive it correct? The condenser wonít know the difference or will it cause issues? I planned on removing the clutch, pulley, and bearing then identifying the best replacement while still driving it.


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Old 01-13-2020, 11:39 AM
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I plan on doing that. Nothing is spinning right now anyway so I could take the pulley off and still drive it correct? The condenser wonít know the difference or will it cause issues? I planned on removing the clutch, pulley, and bearing then identifying the best replacement while still driving it.


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No it wont cause issues. I drove around for weeks without the ac belt when my condenser was leaking.


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Old 01-13-2020, 12:45 PM
twh twh is offline
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+1...if your car has a separate belt for the A/C, just cut it off. No issues driving around that way as long as it doesn't run anything else like the alternator, etc.
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Old 01-13-2020, 02:26 PM
BabyUnicornTaco BabyUnicornTaco is offline
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+1...if your car has a separate belt for the A/C, just cut it off. No issues driving around that way as long as it doesn't run anything else like the alternator, etc.


I have been without the belt for a few weeks. This week it is 78 degrees here in Charleston. I need my ac even in the winter.


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Old 01-13-2020, 02:34 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Ya know since I have you guys here. Anything preventing me from having the vents blow set to 60 even though the condenser is not engaged? Not gonna ruin anything right? Just want some cooler air.


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Old 01-13-2020, 02:50 PM
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Mine didnt fail. Your hcvs are working, they will just close. Interesting test; what will the system do when itís 80 outside.
To be safe, id keep the ac button in off position.

Blah disclaimer blah blah.


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Old 01-22-2020, 05:16 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Would the bolt labeled #2 spin counter clockwise or clockwise to loosen? I think itís counter clockwise. Want to be sure. I think I found some sort of mount that I can wedge a screwdriver against to keep the outer part from spinning so I can get the bolt to budge. Click image for larger version

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Old 01-23-2020, 01:32 AM
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Lookup part number and with that google for pictures, so you can see the thread.


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Old 01-23-2020, 03:22 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Lookup part number and with that google for pictures, so you can see the thread.


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I canít find any help on part numbers but it appears that one of our moderators has done this before. I found one of Hsurfís old posts. Click image for larger version

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Old 01-24-2020, 08:17 PM
BabyUnicornTaco BabyUnicornTaco is offline
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Can anyone confirm this? Am I turning the bolt clockwise or counter clockwise to loosen. The bolt in the center of the clutch plate surrounded by the three smaller bolts.


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