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04-26-2019, 09:12 AM | #1 |
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Drain plug stripped..
I usually torque around 10-12Nm for two drain plugs on the oil pan, but I was half asleep as usual and torqued one of them to 17Nm which stripped the 6mm hex plug. Probably will have to take it to the specialist shop for the next oil change.
Is there a chance I've damaged the oil pan hole as well?
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04-26-2019, 10:18 AM | #2 |
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yep most likely you have stripped the pan, since the bolt is steel and the pan aluminum.
It happened to me recently, I had a shop install a Time Cert (google it, you can purchase it on amazon, just make sure you get the right thread pitch) and that fixed it. |
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04-26-2019, 10:29 AM | #3 | |
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I would have liked BMW to offer aluminum or magnesium drain plugs even at a higher price.. I am uncertain if my shop is willing to put time-sert into my oil pan.
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Last edited by kyrix1st; 04-26-2019 at 10:37 AM.. |
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04-26-2019, 10:32 AM | #4 |
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I don't see why they wouldn't. And yea a new oil pan is super expensive. Plus all the labor. At that point I'd say do the rod bearings as well.
TIME-SERT M12 X 1.50 Metric Drain Plug Repair Kit https://www.amazon.com/dp/B003SER3PA..._mqYWCbVA42R2S There is the url for the time cert. if your shop won't do it find one who will. I'd at least try that before dishing out for a oil pan. Bunch of member have done it themselves and no problem as well. |
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04-26-2019, 10:58 AM | #5 |
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Good lord, did they at least remove the oil pan to install the timesert? Between drilling and taping the threads, timesert installs make for a lot of metal particles. I wouldn't want that anywhere near the oil.
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04-26-2019, 11:08 AM | #6 |
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yah thats the proper way, but if yer gonna pull the pan, mite as well replace it.
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04-26-2019, 11:13 AM | #7 |
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That really sucks. I don't see why the shop wouldn't do a time cert though. Might as well do bearings while you're in there if you haven't yet (if you end up pulling the pan).
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04-26-2019, 11:27 AM | #8 |
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Most shops install the time sert into an installed pan. They grease the bit and clean the particles regularly and then flush the pan. It is ideal to remove the pan, but will cost hours more in labor and is not necessary.
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04-26-2019, 11:33 AM | #9 |
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I dunno about you guys, but the only time I've ever stripped threads is when using a torque wrench. Usually because there was antiseize or other lube on the fastener which throws the torque spec way off (torque specs are usually for "dry" applications).
I've never stripped a thread using a simple ratchet, so I don't bother using a torque wrench on the drain bolts.
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04-26-2019, 11:44 AM | #10 |
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Really not a big deal. The shop I worked at did 50-70 oil changes a day and we did TONS of oil pan repair, on the car. Larger self-cutting threaded plugs are available, you can drill/tap in the next larger size, or use an insert with no problem. Just flush it with a few quarts of oil (the oil you just drained out is fine) and done.
If you really want to you can weld the pan up and re-thread, but I'm not adventurous enough to try that on the car. |
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04-26-2019, 11:44 AM | #11 | |
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Quote:
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04-27-2019, 10:43 PM | #14 | |
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04-27-2019, 11:17 PM | #15 |
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It's 25nm which isn't much, if it stripped it's because it was way over torqued at a prior oil change. You don't need to use a toque wrench, use your smallest wrench and pinch it.
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04-28-2019, 02:45 AM | #16 |
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done this since day 1 on all my BMWs, no issues. 1/4 drive wrench (if you want to be exact) with an adapter and hand tight.
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05-27-2019, 06:50 PM | #17 |
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Another one
Happend to me yesterday changing the oil, first time after buying the car. Could tell the bolt was coming out crooked. My fears were realized pulling the metal pan threads out. I ordered the kit, hopefully will fix it. Unreal some people should not be allowed to work on cars. This was done at a shop before I bought it. They cross threaded it and kept going, surprised it wasn't leaking...
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05-27-2019, 07:27 PM | #19 | |
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But yes, some people should look but never touch.
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05-27-2019, 09:50 PM | #20 |
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No it’s not, if you are a mechanic and you feel a bolt going in badly but you continue to “send it” you clearly don’t take pride in your work.
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05-27-2019, 10:17 PM | #21 | |
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05-27-2019, 11:58 PM | #22 |
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I recently had this dilemma on my first oil change in the car. Honestly, I just listened to my local coder, GORDON.M3. He recommended hand tight with a quarter turn. After my first change, I lifted the car up and changed the drain plugs again just because of the loads of stripped plugs and pans threads I read. Thankfully it was fine. From my experience, everyone I've spoken to that stripped something has used a torque wrench. So I highly recommend going for feel instead. Hand tight and then a quarter turn or less.
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