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| 07-27-2008, 06:01 PM | #1 |
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Oil nut crusher ring.
Can someone explain why the crusher ring on the oil nut need to replaced every oil change?
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| 07-27-2008, 06:25 PM | #2 | |
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Now, some people choose to anneal the washer with a blow torch but why go through all of that when it comes with the BMW filter anyway? :iono:
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| 07-27-2008, 06:27 PM | #3 |
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The name explains it - it's crushed in the process of tightening - once crushed it has to be tossed - can't be re-used.
See this: http://www.freepatentsonline.com/6952875.html Now talk to the guys building the bottom ends of engines about re-using ARP bolts. ; -) |
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| 07-27-2008, 11:28 PM | #4 |
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Thanks for the information. Changed my oil today and didn't want to toss away the old ring because it looked much better than the copper replacement.
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| 07-28-2008, 04:34 PM | #5 | |
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| 07-29-2008, 02:38 AM | #6 | |
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One on the car is aluminum. The replacement from BMW filter is cooper. The old one looks shinier, like my precious. 
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| 07-29-2008, 05:05 AM | #7 |
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Except copper works better as a crush washer.... :smile:
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